diff --git a/REUSE.toml b/REUSE.toml
index df7fb28efa..1e2a9364cb 100644
--- a/REUSE.toml
+++ b/REUSE.toml
@@ -101,6 +101,12 @@ precedence = "aggregate"
 SPDX-FileCopyrightText = "2024 Nextcloud GmbH and Nextcloud contributors"
 SPDX-License-Identifier = "AGPL-3.0-or-later"
 
+[[annotations]]
+path = ["tests/data/mail-filter/*"]
+precedence = "aggregate"
+SPDX-FileCopyrightText = "2024 Nextcloud GmbH and Nextcloud contributors"
+SPDX-License-Identifier = "AGPL-3.0-or-later"
+
 [[annotations]]
 path = ".github/CODEOWNERS"
 precedence = "aggregate"
diff --git a/lib/Controller/MailfilterController.php b/lib/Controller/MailfilterController.php
new file mode 100644
index 0000000000..7609c0559a
--- /dev/null
+++ b/lib/Controller/MailfilterController.php
@@ -0,0 +1,58 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCA\Mail\Controller;
+
+use OCA\Mail\AppInfo\Application;
+use OCA\Mail\Service\AccountService;
+use OCA\Mail\Service\MailFilterService;
+use OCP\AppFramework\Http;
+use OCP\AppFramework\Http\Attribute\Route;
+use OCP\AppFramework\Http\JSONResponse;
+use OCP\AppFramework\OCSController;
+use OCP\IRequest;
+
+class MailfilterController extends OCSController {
+	private string $currentUserId;
+
+	public function __construct(IRequest $request,
+		string $userId,
+		private MailFilterService $mailFilterService,
+		private AccountService $accountService,
+	) {
+		parent::__construct(Application::APP_ID, $request);
+		$this->currentUserId = $userId;
+	}
+
+	#[Route(Route::TYPE_FRONTPAGE, verb: 'GET', url: '/api/mailfilter/{accountId}', requirements: ['accountId' => '[\d]+'])]
+	public function getFilters(int $accountId) {
+		$account = $this->accountService->findById($accountId);
+
+		if ($account->getUserId() !== $this->currentUserId) {
+			return new JSONResponse([], Http::STATUS_NOT_FOUND);
+		}
+
+		$result = $this->mailFilterService->parse($account->getMailAccount());
+
+		return new JSONResponse($result->getFilters());
+	}
+
+	#[Route(Route::TYPE_FRONTPAGE, verb: 'PUT', url: '/api/mailfilter/{accountId}', requirements: ['accountId' => '[\d]+'])]
+	public function updateFilters(int $accountId, array $filters) {
+		$account = $this->accountService->findById($accountId);
+
+		if ($account->getUserId() !== $this->currentUserId) {
+			return new JSONResponse([], Http::STATUS_NOT_FOUND);
+		}
+
+		$this->mailFilterService->update($account->getMailAccount(), $filters);
+
+		return new JSONResponse([]);
+	}
+}
diff --git a/lib/Exception/FilterParserException.php b/lib/Exception/FilterParserException.php
new file mode 100644
index 0000000000..a6ab6d8669
--- /dev/null
+++ b/lib/Exception/FilterParserException.php
@@ -0,0 +1,29 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCA\Mail\Exception;
+
+use Exception;
+
+class FilterParserException extends Exception {
+
+	public static function invalidJson(\Throwable $exception): FilterParserException {
+		return new self(
+			'Failed to parse filter state json: ' . $exception->getMessage(),
+			0,
+			$exception,
+		);
+	}
+
+	public static function invalidState(): FilterParserException {
+		return new self(
+			'Reached an invalid state',
+		);
+	}
+}
diff --git a/lib/Service/AllowedRecipientsService.php b/lib/Service/AllowedRecipientsService.php
new file mode 100644
index 0000000000..f97e03338a
--- /dev/null
+++ b/lib/Service/AllowedRecipientsService.php
@@ -0,0 +1,34 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCA\Mail\Service;
+
+use OCA\Mail\Db\MailAccount;
+
+class AllowedRecipientsService {
+
+	public function __construct(
+		private AliasesService $aliasesService,
+	) {
+	}
+
+	/**
+	 * Return a list of allowed recipients for a given mail account
+	 *
+	 * @return string[] email addresses
+	 */
+	public function get(MailAccount $mailAccount): array {
+		$aliases = array_map(
+			static fn ($alias) => $alias->getAlias(),
+			$this->aliasesService->findAll($mailAccount->getId(), $mailAccount->getUserId())
+		);
+
+		return array_merge([$mailAccount->getEmail()], $aliases);
+	}
+}
diff --git a/lib/Service/MailFilter/FilterBuilder.php b/lib/Service/MailFilter/FilterBuilder.php
new file mode 100644
index 0000000000..6d47c4e342
--- /dev/null
+++ b/lib/Service/MailFilter/FilterBuilder.php
@@ -0,0 +1,154 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCA\Mail\Service\MailFilter;
+
+use OCA\Mail\Exception\ImapFlagEncodingException;
+use OCA\Mail\IMAP\ImapFlag;
+use OCA\Mail\Sieve\SieveUtils;
+
+class FilterBuilder {
+	private const SEPARATOR = '### Nextcloud Mail: Filters ### DON\'T EDIT ###';
+	private const DATA_MARKER = '# FILTER: ';
+	private const SIEVE_NEWLINE = "\r\n";
+
+	public function __construct(private ImapFlag $imapFlag) {
+	}
+
+
+	public function buildSieveScript(array $filters, string $untouchedScript): string {
+		$commands = [];
+		$extensions = [];
+
+		foreach ($filters as $filter) {
+			if ($filter['enable'] === false) {
+				continue;
+			}
+
+			$commands[] = '# ' . $filter['name'];
+
+			$tests = [];
+			foreach ($filter['tests'] as $test) {
+				if ($test['field'] === 'subject') {
+					$tests[] = sprintf(
+						'header :%s "Subject" %s',
+						$test['operator'],
+						SieveUtils::stringList($test['values']),
+					);
+				}
+				if ($test['field'] === 'to') {
+					$tests[] = sprintf(
+						'address :%s :all "To" %s',
+						$test['operator'],
+						SieveUtils::stringList($test['values']),
+					);
+				}
+				if ($test['field'] === 'from') {
+					$tests[] = sprintf(
+						'address :%s :all "From" %s',
+						$test['operator'],
+						SieveUtils::stringList($test['values']),
+					);
+				}
+			}
+
+			if (count($tests) === 0) {
+				// skip filter without tests
+				$commands[] = '# No valid tests found';
+				continue;
+			}
+
+			$actions = [];
+			foreach ($filter['actions'] as $action) {
+				if ($action['type'] === 'fileinto') {
+					$extensions[] = 'fileinto';
+					$actions[] = sprintf(
+						'fileinto "%s";',
+						SieveUtils::escapeString($action['mailbox'])
+					);
+				}
+				if ($action['type'] === 'addflag') {
+					$extensions[] = 'imap4flags';
+					$actions[] = sprintf(
+						'addflag "%s";',
+						SieveUtils::escapeString($this->sanitizeFlag($action['flag']))
+					);
+				}
+				if ($action['type'] === 'keep') {
+					$actions[] = 'keep;';
+				}
+				if ($action['type'] === 'stop') {
+					$actions[] = 'stop;';
+				}
+			}
+
+			if (count($tests) > 1) {
+				$ifTest = sprintf('%s (%s)', $filter['operator'], implode(', ', $tests));
+			} else {
+				$ifTest = $tests[0];
+			}
+
+			$ifBlock = sprintf(
+				"if %s {\r\n%s\r\n}",
+				$ifTest,
+				implode(self::SIEVE_NEWLINE, $actions)
+			);
+
+			$commands[] = $ifBlock;
+		}
+
+		$extensions = array_unique($extensions);
+		$requireSection = [];
+
+		if (count($extensions) > 0) {
+			$requireSection[] = self::SEPARATOR;
+			$requireSection[] = 'require ' . SieveUtils::stringList($extensions) . ';';
+			$requireSection[] = self::SEPARATOR;
+		}
+
+		$stateJsonString = json_encode($this->sanitizeDefinition($filters), JSON_THROW_ON_ERROR);
+
+		$filterSection = [
+			self::SEPARATOR,
+			self::DATA_MARKER . $stateJsonString,
+			...$commands,
+			self::SEPARATOR,
+		];
+
+		return implode(self::SIEVE_NEWLINE, array_merge(
+			$requireSection,
+			[$untouchedScript],
+			$filterSection,
+		));
+	}
+
+	private function sanitizeFlag(string $flag): string {
+		try {
+			return $this->imapFlag->create($flag);
+		} catch (ImapFlagEncodingException) {
+			return 'placeholder_for_invalid_label';
+		}
+	}
+
+	private function sanitizeDefinition(array $filters): array {
+		return array_map(static function ($filter) {
+			unset($filter['accountId'], $filter['id']);
+			$filter['tests'] = array_map(static function ($test) {
+				unset($test['id']);
+				return $test;
+			}, $filter['tests']);
+			$filter['actions'] = array_map(static function ($action) {
+				unset($action['id']);
+				return $action;
+			}, $filter['actions']);
+			$filter['priority'] = (int)$filter['priority'];
+			return $filter;
+		}, $filters);
+	}
+}
diff --git a/lib/Service/MailFilter/FilterParser.php b/lib/Service/MailFilter/FilterParser.php
new file mode 100644
index 0000000000..2f52d708de
--- /dev/null
+++ b/lib/Service/MailFilter/FilterParser.php
@@ -0,0 +1,67 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCA\Mail\Service\MailFilter;
+
+use JsonException;
+use OCA\Mail\Exception\FilterParserException;
+
+class FilterParser {
+	private const SEPARATOR = '### Nextcloud Mail: Filters ### DON\'T EDIT ###';
+	private const DATA_MARKER = '# FILTER: ';
+
+	private const STATE_COPY = 0;
+	private const STATE_SKIP = 1;
+
+	/**
+	 * @throws FilterParserException
+	 */
+	public function parseFilterState(string $sieveScript): FilterParserResult {
+		$filters = [];
+		$scriptOut = [];
+
+		$state = self::STATE_COPY;
+		$nextState = $state;
+
+		$lines = preg_split('/\r?\n/', $sieveScript);
+		foreach ($lines as $line) {
+			switch ($state) {
+				case self::STATE_COPY:
+					if (str_starts_with($line, self::SEPARATOR)) {
+						$nextState = self::STATE_SKIP;
+					} else {
+						$scriptOut[] = $line;
+					}
+					break;
+				case self::STATE_SKIP:
+					if (str_starts_with($line, self::SEPARATOR)) {
+						$nextState = self::STATE_COPY;
+					} elseif (str_starts_with($line, self::DATA_MARKER)) {
+						$json = substr($line, strlen(self::DATA_MARKER));
+
+						try {
+							$data = json_decode($json, true, 10, JSON_THROW_ON_ERROR);
+						} catch (JsonException $e) {
+							throw FilterParserException::invalidJson($e);
+						}
+
+						if (is_array($data)) {
+							array_push($filters, ...$data);
+						}
+					}
+					break;
+				default:
+					throw FilterParserException::invalidState();
+			}
+			$state = $nextState;
+		}
+
+		return new FilterParserResult($filters, $sieveScript, implode("\r\n", $scriptOut));
+	}
+}
diff --git a/lib/Service/MailFilter/FilterParserResult.php b/lib/Service/MailFilter/FilterParserResult.php
new file mode 100644
index 0000000000..a8a2b3656e
--- /dev/null
+++ b/lib/Service/MailFilter/FilterParserResult.php
@@ -0,0 +1,43 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCA\Mail\Service\MailFilter;
+
+use JsonSerializable;
+use ReturnTypeWillChange;
+
+class FilterParserResult implements JsonSerializable {
+	public function __construct(
+		private array $filters,
+		private string $sieveScript,
+		private string $untouchedSieveScript,
+	) {
+	}
+
+	public function getFilters(): array {
+		return $this->filters;
+	}
+
+	public function getSieveScript(): string {
+		return $this->sieveScript;
+	}
+
+	public function getUntouchedSieveScript(): string {
+		return $this->untouchedSieveScript;
+	}
+
+	#[ReturnTypeWillChange]
+	public function jsonSerialize() {
+		return [
+			'filters' => $this->filters,
+			'script' => $this->getSieveScript(),
+			'untouchedScript' => $this->getUntouchedSieveScript(),
+		];
+	}
+}
diff --git a/lib/Service/MailFilter/FilterState.php b/lib/Service/MailFilter/FilterState.php
new file mode 100644
index 0000000000..e238da2c57
--- /dev/null
+++ b/lib/Service/MailFilter/FilterState.php
@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCA\Mail\Service\MailFilter;
+
+use JsonSerializable;
+use ReturnTypeWillChange;
+
+class FilterState implements JsonSerializable {
+	public const DEFAULT_VERSION = 1;
+
+	public function __construct(
+		private array $filters,
+	) {
+	}
+
+	public static function fromJson(array $data): self {
+		return new self($data);
+	}
+
+	public function getFilters(): array {
+		return $this->filters;
+	}
+
+	#[ReturnTypeWillChange]
+	public function jsonSerialize() {
+		return $this->filters;
+	}
+}
diff --git a/lib/Service/MailFilterService.php b/lib/Service/MailFilterService.php
new file mode 100644
index 0000000000..46a23513ba
--- /dev/null
+++ b/lib/Service/MailFilterService.php
@@ -0,0 +1,89 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCA\Mail\Service;
+
+use Horde\ManageSieve\Exception as ManageSieveException;
+use JsonException;
+use OCA\Mail\Db\MailAccount;
+use OCA\Mail\Exception\ClientException;
+use OCA\Mail\Exception\CouldNotConnectException;
+use OCA\Mail\Exception\FilterParserException;
+use OCA\Mail\Exception\OutOfOfficeParserException;
+use OCA\Mail\Service\MailFilter\FilterBuilder;
+use OCA\Mail\Service\MailFilter\FilterParser;
+use OCA\Mail\Service\MailFilter\FilterParserResult;
+use OCA\Mail\Service\OutOfOffice\OutOfOfficeParser;
+use Psr\Log\LoggerInterface;
+
+class MailFilterService {
+
+	public function __construct(
+		private AllowedRecipientsService $allowedRecipientsService,
+		private OutOfOfficeParser $outOfOfficeParser,
+		private FilterParser $filterParser,
+		private FilterBuilder $filterBuilder,
+		private SieveService $sieveService,
+		private LoggerInterface $logger,
+	) {
+	}
+
+	/**
+	 * @throws ClientException
+	 * @throws ManageSieveException
+	 * @throws CouldNotConnectException
+	 * @throws FilterParserException
+	 */
+	public function parse(MailAccount $account): FilterParserResult {
+		$script = $this->sieveService->getActiveScript($account->getUserId(), $account->getId());
+		return $this->filterParser->parseFilterState($script->getScript());
+	}
+
+	/**
+	 * @throws CouldNotConnectException
+	 * @throws JsonException
+	 * @throws ClientException
+	 * @throws OutOfOfficeParserException
+	 * @throws ManageSieveException
+	 * @throws FilterParserException
+	 */
+	public function update(MailAccount $account, array $filters): void {
+		$script = $this->sieveService->getActiveScript($account->getUserId(), $account->getId());
+
+		$oooResult = $this->outOfOfficeParser->parseOutOfOfficeState($script->getScript());
+		$filterResult = $this->filterParser->parseFilterState($oooResult->getUntouchedSieveScript());
+
+		$newScript = $this->filterBuilder->buildSieveScript(
+			$filters,
+			$filterResult->getUntouchedSieveScript()
+		);
+
+		$oooState = $oooResult->getState();
+
+		if ($oooState === null) {
+			$newScriptWithOutOfOffice = $newScript;
+		} else {
+			$newScriptWithOutOfOffice = $this->outOfOfficeParser->buildSieveScript(
+				$oooState,
+				$newScript,
+				$this->allowedRecipientsService->get($account),
+			);
+		}
+
+		try {
+			$this->sieveService->updateActiveScript($account->getUserId(), $account->getId(), $newScriptWithOutOfOffice);
+		} catch (ManageSieveException $e) {
+			$this->logger->error('Failed to save sieve script: ' . $e->getMessage(), [
+				'exception' => $e,
+				'script' => $newScript,
+			]);
+			throw $e;
+		}
+	}
+}
diff --git a/lib/Service/OutOfOffice/OutOfOfficeParser.php b/lib/Service/OutOfOffice/OutOfOfficeParser.php
index 79a532514f..28bb2abfd7 100644
--- a/lib/Service/OutOfOffice/OutOfOfficeParser.php
+++ b/lib/Service/OutOfOffice/OutOfOfficeParser.php
@@ -13,6 +13,7 @@
 use DateTimeZone;
 use JsonException;
 use OCA\Mail\Exception\OutOfOfficeParserException;
+use OCA\Mail\Sieve\SieveUtils;
 
 /**
  * Parses and builds out-of-office states from/to sieve scripts.
@@ -119,7 +120,7 @@ public function buildSieveScript(
 			$condition = "currentdate :value \"ge\" \"iso8601\" \"$formattedStart\"";
 		}
 
-		$escapedSubject = $this->escapeStringForSieve($state->getSubject());
+		$escapedSubject = SieveUtils::escapeString($state->getSubject());
 		$vacation = [
 			'vacation',
 			':days 4',
@@ -134,7 +135,7 @@ public function buildSieveScript(
 			$vacation[] = ":addresses [$joinedRecipients]";
 		}
 
-		$escapedMessage = $this->escapeStringForSieve($state->getMessage());
+		$escapedMessage = SieveUtils::escapeString($state->getMessage());
 		$vacation[] = "\"$escapedMessage\"";
 		$vacationCommand = implode(' ', $vacation);
 
@@ -183,9 +184,4 @@ public function buildSieveScript(
 	private function formatDateForSieve(DateTimeImmutable $date): string {
 		return $date->setTimezone($this->utc)->format('Y-m-d\TH:i:s\Z');
 	}
-
-	private function escapeStringForSieve(string $subject): string {
-		$subject = preg_replace('/\\\\/', '\\\\\\\\', $subject);
-		return preg_replace('/"/', '\\"', $subject);
-	}
 }
diff --git a/lib/Service/OutOfOfficeService.php b/lib/Service/OutOfOfficeService.php
index c12569b5f0..f209f021d1 100644
--- a/lib/Service/OutOfOfficeService.php
+++ b/lib/Service/OutOfOfficeService.php
@@ -13,7 +13,6 @@
 use Horde\ManageSieve\Exception as ManageSieveException;
 use InvalidArgumentException;
 use JsonException;
-use OCA\Mail\Db\Alias;
 use OCA\Mail\Db\MailAccount;
 use OCA\Mail\Exception\ClientException;
 use OCA\Mail\Exception\CouldNotConnectException;
@@ -36,8 +35,8 @@ public function __construct(
 		private OutOfOfficeParser $outOfOfficeParser,
 		private SieveService $sieveService,
 		private LoggerInterface $logger,
-		private AliasesService $aliasesService,
 		private ITimeFactory $timeFactory,
+		private AllowedRecipientsService $allowedRecipientsService,
 		ContainerInterface $container,
 	) {
 		// TODO: inject directly if we only support Nextcloud >= 28
@@ -72,7 +71,7 @@ public function update(MailAccount $account, OutOfOfficeState $state): void {
 		$newScript = $this->outOfOfficeParser->buildSieveScript(
 			$state,
 			$oldState->getUntouchedSieveScript(),
-			$this->buildAllowedRecipients($account),
+			$this->allowedRecipientsService->get($account),
 		);
 		try {
 			$this->sieveService->updateActiveScript($account->getUserId(), $account->getId(), $newScript);
@@ -155,15 +154,4 @@ public function disable(MailAccount $account): void {
 		$state->setEnabled(false);
 		$this->update($account, $state);
 	}
-
-	/**
-	 * @return string[]
-	 */
-	private function buildAllowedRecipients(MailAccount $mailAccount): array {
-		$aliases = $this->aliasesService->findAll($mailAccount->getId(), $mailAccount->getUserId());
-		$formattedAliases = array_map(static function (Alias $alias) {
-			return $alias->getAlias();
-		}, $aliases);
-		return array_merge([$mailAccount->getEmail()], $formattedAliases);
-	}
 }
diff --git a/src/components/AccountSettings.vue b/src/components/AccountSettings.vue
index 703ee899a0..d4a61327f6 100644
--- a/src/components/AccountSettings.vue
+++ b/src/components/AccountSettings.vue
@@ -55,6 +55,13 @@
 				{{ t('mail', 'Please connect to a sieve server first.') }}
 			</p>
 		</AppSettingsSection>
+		<AppSettingsSection v-if="account && account.sieveEnabled"
+			id="mail-filters"
+			:name="t('mail', 'Mail filters')">
+			<div id="mail-filters">
+				<MailFilters :key="account.accountId" ref="mailFilters" :account="account" />
+			</div>
+		</AppSettingsSection>
 		<AppSettingsSection v-if="account && account.sieveEnabled"
 			id="sieve-filter"
 			:name="t('mail', 'Sieve filter rules')">
@@ -104,6 +111,7 @@ import CertificateSettings from './CertificateSettings.vue'
 import SearchSettings from './SearchSettings.vue'
 import TrashRetentionSettings from './TrashRetentionSettings.vue'
 import logger from '../logger.js'
+import MailFilters from './mailFilter/MailFilters.vue'
 
 export default {
 	name: 'AccountSettings',
@@ -121,6 +129,7 @@ export default {
 		CertificateSettings,
 		TrashRetentionSettings,
 		SearchSettings,
+		MailFilters,
 	},
 	props: {
 		account: {
diff --git a/src/components/mailFilter/Action.vue b/src/components/mailFilter/Action.vue
new file mode 100644
index 0000000000..7f5754d780
--- /dev/null
+++ b/src/components/mailFilter/Action.vue
@@ -0,0 +1,98 @@
+<!--
+  - SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+  - SPDX-License-Identifier: AGPL-3.0-or-later
+-->
+<template>
+	<div class="mail-filter-row">
+		<div class="mail-filter-column">
+			<NcSelect :value="action.type"
+				:required="true"
+				:label-outside="true"
+				:options="availableTypes"
+				@input="updateAction({ type: $event })" />
+		</div>
+		<div class="mail-filter-column">
+			<component :is="componentInstance"
+				v-if="componentInstance"
+				:action="action"
+				:account="account"
+				@update-action="updateAction" />
+		</div>
+		<div class="mail-filter-column">
+			<NcButton aria-label="Delete action"
+				type="tertiary-no-background"
+				@click="deleteAction">
+				{{ t('mail', 'Delete action') }}
+				<template #icon>
+					<DeleteIcon :size="20" />
+				</template>
+			</NcButton>
+		</div>
+	</div>
+</template>
+<script>
+import ActionFileinto from './ActionFileinto.vue'
+import ActionAddflag from './ActionAddflag.vue'
+import ActionStop from './ActionStop.vue'
+import { NcButton, NcSelect, NcTextField } from '@nextcloud/vue'
+import DeleteIcon from 'vue-material-design-icons/Delete.vue'
+
+export default {
+	name: 'Action',
+	components: {
+		NcSelect,
+		NcTextField,
+		NcButton,
+		ActionFileinto,
+		ActionAddflag,
+		ActionStop,
+		DeleteIcon,
+	},
+	props: {
+		action: {
+			type: Object,
+			required: true,
+		},
+		account: {
+			type: Object,
+			required: true,
+		},
+	},
+	data() {
+		return {
+			availableTypes: [
+				'addflag',
+				'fileinto',
+				'stop',
+			],
+		}
+	},
+	computed: {
+		componentInstance() {
+			if (this.action.type === 'fileinto') {
+				return ActionFileinto
+			} else if (this.action.type === 'addflag') {
+				return ActionAddflag
+			} else if (this.action.type === 'stop') {
+				return ActionStop
+			}
+			return null
+		},
+	},
+	methods: {
+		updateAction(properties) {
+			this.$emit('update-action', { ...this.action, ...properties })
+		},
+		deleteAction() {
+			this.$emit('delete-action', this.action)
+		},
+	},
+}
+</script>
+<style lang="scss" scoped>
+.mail-filter-row {
+	display: flex;
+	gap: 5px;
+	align-items: baseline;
+}
+</style>
diff --git a/src/components/mailFilter/ActionAddflag.vue b/src/components/mailFilter/ActionAddflag.vue
new file mode 100644
index 0000000000..961f512cf4
--- /dev/null
+++ b/src/components/mailFilter/ActionAddflag.vue
@@ -0,0 +1,45 @@
+<!--
+  - SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+  - SPDX-License-Identifier: AGPL-3.0-or-later
+-->
+<template>
+	<NcTextField :required="true"
+		:label="t('mail', 'Flag')"
+		:value="flag"
+		@update:value="onInput" />
+</template>
+<script>
+import { NcTextField } from '@nextcloud/vue'
+
+export default {
+	name: 'ActionAddflag',
+	components: {
+		NcTextField,
+	},
+	props: {
+		action: {
+			type: Object,
+			required: true,
+		},
+		account: {
+			type: Object,
+			required: true,
+		},
+	},
+	computed: {
+		flag() {
+			return this.action.flag ?? ''
+		},
+	},
+	methods: {
+		onInput(value) {
+			this.$emit('update-action', { flag: value })
+		},
+	},
+}
+</script>
+<style lang="scss" scoped>
+.input-field {
+	min-width: 260px;
+}
+</style>
diff --git a/src/components/mailFilter/ActionFileinto.vue b/src/components/mailFilter/ActionFileinto.vue
new file mode 100644
index 0000000000..4ea61da394
--- /dev/null
+++ b/src/components/mailFilter/ActionFileinto.vue
@@ -0,0 +1,50 @@
+<!--
+  - SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+  - SPDX-License-Identifier: AGPL-3.0-or-later
+-->
+<template>
+	<NcSelect ref="select"
+		:value="mailbox"
+		:options="mailboxes"
+		:required="true"
+		@input="onInput" />
+</template>
+<script>
+
+import NcSelect from '@nextcloud/vue/dist/Components/NcSelect.js'
+import { mailboxHasRights } from '../../util/acl.js'
+export default {
+	name: 'ActionFileinto',
+	components: {
+		NcSelect,
+	},
+	props: {
+		action: {
+			type: Object,
+			required: true,
+		},
+		account: {
+			type: Object,
+			required: true,
+		},
+	},
+	computed: {
+		mailbox() {
+			return this.action.mailbox ?? undefined
+		},
+		mailboxes() {
+			const mailboxes = this.$store.getters.getMailboxes(this.account.accountId)
+				.filter(mailbox => mailboxHasRights(mailbox, 'i'))
+
+			return mailboxes.map((mailbox) => {
+				return mailbox.displayName
+			})
+		},
+	},
+	methods: {
+		onInput(value) {
+			this.$emit('update-action', { mailbox: value })
+		},
+	},
+}
+</script>
diff --git a/src/components/mailFilter/ActionStop.vue b/src/components/mailFilter/ActionStop.vue
new file mode 100644
index 0000000000..6d7184fd6d
--- /dev/null
+++ b/src/components/mailFilter/ActionStop.vue
@@ -0,0 +1,23 @@
+<!--
+  - SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+  - SPDX-License-Identifier: AGPL-3.0-or-later
+-->
+<template>
+	<p>{{ t('mail', 'The stop action ends all processing') }}</p>
+</template>
+<script>
+
+export default {
+	name: 'ActionStop',
+	props: {
+		action: {
+			type: Object,
+			required: true,
+		},
+		account: {
+			type: Object,
+			required: true,
+		},
+	},
+}
+</script>
diff --git a/src/components/mailFilter/DeleteModal.vue b/src/components/mailFilter/DeleteModal.vue
new file mode 100644
index 0000000000..3948068df3
--- /dev/null
+++ b/src/components/mailFilter/DeleteModal.vue
@@ -0,0 +1,60 @@
+<!--
+  - SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+  - SPDX-License-Identifier: AGPL-3.0-or-later
+-->
+<template>
+	<NcDialog :name="t('mail','Delete mail filter {filterName}?', {filterName: filter.name})"
+		:open="open"
+		:message="t('mail', 'Are you sure to delete the mail filter?')"
+		:buttons="buttons"
+		@closing="closeModal()" />
+</template>
+
+<script>
+import { NcDialog } from '@nextcloud/vue'
+import IconCancel from '@mdi/svg/svg/cancel.svg'
+import IconCheck from '@mdi/svg/svg/check.svg'
+
+export default {
+	name: 'DeleteModal',
+	components: {
+		NcDialog,
+	},
+	props: {
+		filter: {
+			type: Object,
+			required: true,
+		},
+		open: {
+			type: Boolean,
+			required: true,
+		},
+	},
+	data() {
+		return {
+			buttons: [
+				{
+					label: t('mail', 'Cancel'),
+					icon: IconCancel,
+					callback: () => { this.closeModal() },
+				},
+				{
+					label: t('mail', 'Delete filter'),
+					type: 'error',
+					icon: IconCheck,
+					callback: () => { this.deleteFilter() },
+				},
+			],
+		}
+	},
+	methods: {
+		deleteFilter() {
+			this.$emit('delete-filter', this.filter)
+		},
+		closeModal() {
+			this.$emit('close')
+		},
+	},
+}
+
+</script>
diff --git a/src/components/mailFilter/MailFilters.vue b/src/components/mailFilter/MailFilters.vue
new file mode 100644
index 0000000000..6736fbf50c
--- /dev/null
+++ b/src/components/mailFilter/MailFilters.vue
@@ -0,0 +1,217 @@
+<!--
+  - SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+  - SPDX-License-Identifier: AGPL-3.0-or-later
+-->
+<template>
+	<div class="section">
+		<ul>
+			<NcListItem v-for="filter in filters"
+				:key="filter.id"
+				:name="filter.name"
+				:compact="true"
+				@click="openUpdateModal(filter)">
+				<template #subname>
+					<span v-if="filter.enable">{{ t('mail', 'Filter is active') }}</span>
+					<span v-else>{{ t('mail', 'Filter is not active') }}</span>
+				</template>
+				<template #actions>
+					<NcActionButton @click="openDeleteModal(filter)">
+						<template #icon>
+							<DeleteIcon :size="20" />
+						</template>
+						{{ t('mail', 'Delete filter') }}
+					</NcActionButton>
+				</template>
+			</NcListItem>
+		</ul>
+		<NcButton class="app-settings-button"
+			type="primary"
+			:aria-label="t('mail', 'New filter')"
+			@click.prevent.stop="createFilter">
+			{{ t('mail', 'New filter') }}
+		</NcButton>
+		<UpdateModal v-if="showUpdateModal && currentFilter"
+			:filter="currentFilter"
+			:account="account"
+			:loading="loading"
+			@update-filter="updateFilter"
+			@close="closeModal" />
+		<DeleteModal v-if="showDeleteModal && currentFilter"
+			:filter="currentFilter"
+			:open="showDeleteModal"
+			:loading="loading"
+			@delete-filter="deleteFilter"
+			@close="closeModal" />
+	</div>
+</template>
+
+<script>
+import { NcActionButton, NcListItem, NcButton } from '@nextcloud/vue'
+import UpdateModal from './UpdateModal.vue'
+import { randomId } from '../../util/randomId.js'
+import logger from '../../logger.js'
+import { mapStores } from 'pinia'
+import useMailFilterStore from '../../store/mailFilterStore.js'
+import DeleteIcon from 'vue-material-design-icons/Delete.vue'
+import DeleteModal from './DeleteModal.vue'
+import { showError, showSuccess } from '@nextcloud/dialogs'
+
+export default {
+	name: 'MailFilters',
+	components: {
+		NcButton,
+		NcListItem,
+		NcActionButton,
+		UpdateModal,
+		DeleteIcon,
+		DeleteModal,
+
+	},
+	props: {
+		account: {
+			type: Object,
+			required: true,
+		},
+	},
+	data() {
+		return {
+			showUpdateModal: false,
+			showDeleteModal: false,
+			script: '',
+			loading: true,
+			errorMessage: '',
+			currentFilter: null,
+		}
+	},
+	computed: {
+		...mapStores(useMailFilterStore),
+		filters() {
+			return this.mailFilterStore.filters
+		},
+		scriptData() {
+			return this.$store.getters.getActiveSieveScript(this.account.id)
+		},
+	},
+	watch: {
+		scriptData: {
+			immediate: true,
+			handler(scriptData) {
+				if (!scriptData) {
+					return
+				}
+
+				this.script = scriptData.script
+				this.loading = false
+			},
+		},
+	},
+	async mounted() {
+		await this.mailFilterStore.fetch(this.account.id)
+	},
+	methods: {
+		createFilter() {
+			const priority = Math.max(0, ...this.filters.map((item) => item.priority ?? 0)) + 10
+
+			this.currentFilter = {
+				id: randomId(),
+				name: t('mail', 'New filter'),
+				enable: true,
+				operator: 'allof',
+				tests: [],
+				actions: [],
+				priority,
+			}
+			this.showUpdateModal = true
+			this.loading = false
+		},
+		openUpdateModal(filter) {
+			this.currentFilter = filter
+			this.showUpdateModal = true
+		},
+		openDeleteModal(filter) {
+			this.currentFilter = filter
+			this.showDeleteModal = true
+
+		},
+		async updateFilter(filter) {
+			this.loading = true
+			this.mailFilterStore.$patch((state) => {
+				const index = state.filters.findIndex((item) => item.id === filter.id)
+				logger.debug('update filter', { filter, index })
+
+				if (index === -1) {
+					state.filters.push(filter)
+				} else {
+					state.filters[index] = filter
+				}
+
+				state.filters.sort((a, b) => a.priority - b.priority)
+			})
+
+			try {
+				await this.mailFilterStore.update(this.account.id).then(() => {
+					showSuccess(t('mail', 'Filter saved'))
+				})
+				await this.$store.dispatch('fetchActiveSieveScript', { accountId: this.account.id })
+			} catch (e) {
+				logger.error(e)
+				showError(t('mail', 'Could not save filter'))
+			} finally {
+				this.loading = false
+			}
+		},
+		async deleteFilter(filter) {
+			this.loading = true
+
+			this.mailFilterStore.$patch((state) => {
+				const index = state.filters.findIndex((item) => item.id === filter.id)
+				logger.debug('delete filter', { filter, index })
+
+				if (index !== -1) {
+					state.filters.splice(index, 1)
+				}
+			})
+
+			try {
+				await this.mailFilterStore.update(this.account.id).then(() => {
+					showSuccess(t('mail', 'Filter deleted'))
+				})
+			} catch (e) {
+				logger.error(e)
+				showError(t('mail', 'Could not delete filter'))
+			} finally {
+				this.loading = false
+			}
+
+			await this.$store.dispatch('fetchActiveSieveScript', { accountId: this.account.id })
+		},
+		closeModal() {
+			this.currentFilter = null
+			this.showUpdateModal = false
+			this.showDeleteModal = false
+		},
+	},
+}
+</script>
+
+<style lang="scss" scoped>
+.section {
+	display: block;
+	padding: 0;
+	margin-bottom: 23px;
+}
+
+textarea {
+	width: 100%;
+}
+
+.primary {
+	padding-left: 26px;
+	background-position: 6px;
+	color: var(--color-main-background);
+
+	&:after {
+		 left: 14px;
+	 }
+}
+</style>
diff --git a/src/components/mailFilter/Operator.vue b/src/components/mailFilter/Operator.vue
new file mode 100644
index 0000000000..c26293822b
--- /dev/null
+++ b/src/components/mailFilter/Operator.vue
@@ -0,0 +1,48 @@
+<!--
+  - SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+  - SPDX-License-Identifier: AGPL-3.0-or-later
+-->
+<template>
+	<div>
+		<div>
+			<p>{{ t('mail', 'Operator') }}</p>
+		</div>
+		<div>
+			<NcCheckboxRadioSwitch :checked="filter.operator"
+				value="allof"
+				name="sharing_permission_radio"
+				type="radio"
+				@update:checked="updateFilter('allof')">
+				allof ({{ t('mail', 'If all tests pass, then the actions will be executed') }})
+			</NcCheckboxRadioSwitch>
+			<NcCheckboxRadioSwitch :checked="filter.operator"
+				value="anyof"
+				name="sharing_permission_radio"
+				type="radio"
+				@update:checked="updateFilter('anyof')">
+				anyof ({{ t('mail', 'If one test pass, then the actions will be executed') }})
+			</NcCheckboxRadioSwitch>
+		</div>
+	</div>
+</template>
+<script>
+import { NcCheckboxRadioSwitch } from '@nextcloud/vue'
+
+export default {
+	name: 'Operator',
+	components: {
+		NcCheckboxRadioSwitch,
+	},
+	props: {
+		filter: {
+			type: Object,
+			required: true,
+		},
+	},
+	methods: {
+		updateFilter(operator) {
+			this.$emit('update:operator', operator)
+		},
+	},
+}
+</script>
diff --git a/src/components/mailFilter/Test.vue b/src/components/mailFilter/Test.vue
new file mode 100644
index 0000000000..0b03d379a6
--- /dev/null
+++ b/src/components/mailFilter/Test.vue
@@ -0,0 +1,120 @@
+<!--
+  - SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+  - SPDX-License-Identifier: AGPL-3.0-or-later
+-->
+<template>
+	<div class="mail-filter-rows">
+		<div class="mail-filter-rows__row">
+			<div class="mail-filter-rows__row__column">
+				<NcSelect input-label="field"
+					:value="test.field"
+					:required="true"
+					:label-outside="true"
+					:options="['subject', 'to', 'from']"
+					@input="updateTest({ field: $event })" />
+			</div>
+			<div class="mail-filter-rows__row__column">
+				<NcSelect input-label="operator"
+					:value="test.operator"
+					:required="true"
+					:label-outside="true"
+					:options="['is', 'contains', 'matches']"
+					@input="updateTest({ operator: $event })" />
+			</div>
+			<div class="mail-filter-rows__row__column">
+				<NcButton aria-label="Delete action"
+					type="tertiary-no-background"
+					@click="deleteTest">
+					<template #icon>
+						<DeleteIcon :size="20" />
+					</template>
+					{{ t('mail', 'Delete test') }}
+				</NcButton>
+			</div>
+		</div>
+		<div class="mail-filter-rows__row">
+			<NcSelect v-model="localValues"
+				input-label="value"
+				class="mail-filter-rows__row__select"
+				:multiple="true"
+				:wrap="true"
+				:close-on-select="false"
+				:taggable="true"
+				:required="true"
+				@option:selected="updateTest({ values: localValues })"
+				@option:deselected="updateTest({ values: localValues })" />
+		</div>
+		<hr class="solid">
+	</div>
+</template>
+<script>
+import { NcButton, NcSelect } from '@nextcloud/vue'
+import DeleteIcon from 'vue-material-design-icons/Delete.vue'
+
+export default {
+	name: 'Test',
+	components: {
+		NcButton,
+		NcSelect,
+		DeleteIcon,
+	},
+	props: {
+		test: {
+			type: Object,
+			required: true,
+		},
+	},
+	data() {
+		return {
+			inputValue: '',
+			localValues: [],
+		}
+	},
+	mounted() {
+		this.localValues = [...this.test.values]
+	},
+	methods: {
+		updateTest(properties) {
+			this.$emit('update-test', { ...this.test, ...properties })
+		},
+		deleteTest() {
+			this.$emit('delete-test', this.test)
+		},
+	},
+}
+</script>
+<style lang="scss" scoped>
+.solid {
+	margin: calc(var(--default-grid-baseline) * 4) 0 0 0;
+}
+.mail-filter-rows {
+	margin-bottom: calc(var(--default-grid-baseline) * 4);
+	&__row {
+		display: flex;
+		gap: var(--default-grid-baseline);
+		align-items: baseline;
+		&__column {
+			display: block;
+			flex-grow: 1;
+		}
+		&__column *{
+			width: 100%;
+		}
+		&__select {
+			max-width: 100% !important;
+			width: 100%;
+		}
+
+	}
+}
+
+.values-list {
+	display: flex;
+	gap: var(--default-grid-baseline);
+	flex-wrap: wrap;
+	&__item {
+		display: flex;
+		gap: var(--default-grid-baseline);
+	}
+}
+</style>
diff --git a/src/components/mailFilter/UpdateModal.vue b/src/components/mailFilter/UpdateModal.vue
new file mode 100644
index 0000000000..b7b34a3686
--- /dev/null
+++ b/src/components/mailFilter/UpdateModal.vue
@@ -0,0 +1,177 @@
+<!--
+  - SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+  - SPDX-License-Identifier: AGPL-3.0-or-later
+-->
+<template>
+	<NcModal size="large"
+		:close-on-click-outside="false"
+		:name="t('mail','Update mail filter')"
+		@close="closeModal">
+		<form class="modal__content" @submit.prevent="updateFilter">
+			<div class="filter-name">
+				<NcTextField :value.sync="clone.name"
+					:label="t('mail', 'Filter name')"
+					:required="true" />
+			</div>
+
+			<div class="filter-operator">
+				<Operator :filter="clone" @update:operator="updateOperator" />
+			</div>
+
+			<div class="filter-tests">
+				<p>{{ t('mail', 'Tests') }}</p>
+				<Test v-for="test in clone.tests"
+					:key="test.id"
+					:test="test"
+					@update-test="updateTest"
+					@delete-test="deleteTest" />
+				<NcButton class="app-settings-button"
+					type="secondary"
+					:aria-label="t('mail', 'New test')"
+					@click="createTest">
+					{{ t('mail', 'New test') }}
+				</NcButton>
+			</div>
+
+			<div class="filter-actions">
+				<p>{{ t('mail', 'Actions') }}</p>
+				<Action v-for="action in clone.actions"
+					:key="action.id"
+					:action="action"
+					:account="account"
+					@update-action="updateAction"
+					@delete-action="deleteAction" />
+				<NcButton class="app-settings-button"
+					type="secondary"
+					:aria-label="t('mail', 'New action')"
+					@click="createAction">
+					{{ t('mail', 'New action') }}
+				</NcButton>
+			</div>
+
+			<NcTextField :value.sync="clone.priority"
+				type="number"
+				:label="t('mail', 'Priority')"
+				:required="true" />
+
+			<NcCheckboxRadioSwitch :checked.sync="clone.enable" type="switch">
+				{{ t('mail', 'Enable filter') }}
+			</NcCheckboxRadioSwitch>
+
+			<NcButton type="primary"
+				native-type="submit">
+				<template #icon>
+					<NcLoadingIcon v-if="loading" :size="16" />
+					<IconCheck v-else :size="16" />
+				</template>
+				{{ t('mail', 'Save filter') }}
+			</NcButton>
+		</form>
+	</NcModal>
+</template>
+<script>
+import { NcButton, NcCheckboxRadioSwitch, NcModal, NcTextField, NcLoadingIcon } from '@nextcloud/vue'
+import Test from './Test.vue'
+import Operator from './Operator.vue'
+import { randomId } from '../../util/randomId.js'
+import Action from './Action.vue'
+import IconCheck from 'vue-material-design-icons/Check.vue'
+
+export default {
+	name: 'UpdateModal',
+	components: {
+		IconCheck,
+		Action,
+		Operator,
+		Test,
+		NcButton,
+		NcCheckboxRadioSwitch,
+		NcLoadingIcon,
+		NcModal,
+		NcTextField,
+	},
+	props: {
+		filter: {
+			type: Object,
+			required: true,
+		},
+		account: {
+			type: Object,
+			required: true,
+		},
+		loading: {
+			type: Boolean,
+			required: false,
+		},
+	},
+	data() {
+		return {
+			clone: structuredClone(this.filter),
+		}
+	},
+	methods: {
+		createTest() {
+			this.clone.tests.push({ id: randomId(), operator: null, values: [] })
+		},
+		updateTest(test) {
+			const index = this.clone.tests.findIndex((items) => items.id === test.id)
+			this.$set(this.clone.tests, index, test)
+		},
+		deleteTest(test) {
+			this.clone.tests = this.clone.tests.filter((item) => item.id !== test.id)
+		},
+		createAction() {
+			this.clone.actions.push({ id: randomId(), type: null })
+		},
+		updateAction(action) {
+			const index = this.clone.actions.findIndex((item) => item.id === action.id)
+			this.$set(this.clone.actions, index, action)
+		},
+		updateOperator(operator) {
+			this.clone.operator = operator
+		},
+		deleteAction(action) {
+			this.clone.actions = this.clone.actions.filter((item) => item.id !== action.id)
+		},
+		updateFilter() {
+			this.$emit('update-filter', structuredClone(this.clone))
+		},
+		closeModal() {
+			this.$emit('close')
+		},
+
+	},
+}
+</script>
+<style lang="scss" scoped>
+.modal__content {
+	margin: 50px;
+}
+
+.modal__content h2 {
+	text-align: center;
+}
+
+.filter-name, .filter-operator, .filter-tests, .filter-actions {
+	margin-bottom: 8px;
+}
+
+.form-group {
+	margin: calc(var(--default-grid-baseline) * 4) 0;
+	display: flex;
+	flex-direction: column;
+	align-items: flex-start;
+}
+
+.external-label {
+	display: flex;
+	width: 100%;
+	margin-top: 1rem;
+}
+
+.external-label label {
+	padding-top: 7px;
+	padding-right: 14px;
+	white-space: nowrap;
+}
+</style>
diff --git a/src/service/MailFilterService.js b/src/service/MailFilterService.js
new file mode 100644
index 0000000000..eaabaf1046
--- /dev/null
+++ b/src/service/MailFilterService.js
@@ -0,0 +1,22 @@
+/**
+ * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+import { generateUrl } from '@nextcloud/router'
+import axios from '@nextcloud/axios'
+
+export async function getFilters(accountId) {
+	const url = generateUrl('/apps/mail/api/mailfilter/{accountId}', { accountId })
+
+	const { data } = await axios.get(url)
+
+	return data
+}
+
+export async function updateFilters(accountId, filters) {
+	const url = generateUrl('/apps/mail/api/mailfilter/{accountId}', { accountId })
+
+	const { data } = await axios.put(url, { filters })
+
+	return data
+}
diff --git a/src/store/mailFilterStore.js b/src/store/mailFilterStore.js
new file mode 100644
index 0000000000..da6d1d6fc2
--- /dev/null
+++ b/src/store/mailFilterStore.js
@@ -0,0 +1,52 @@
+/**
+ * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+import { defineStore } from 'pinia'
+import * as MailFilterService from '../service/MailFilterService.js'
+import { randomId } from '../util/randomId.js'
+
+export default defineStore('mailFilter', {
+	state: () => {
+		return {
+			filters: [],
+		}
+	},
+	actions: {
+		async fetch(accountId) {
+			await this.$patch(async (state) => {
+				const filters = await MailFilterService.getFilters(accountId)
+				state.filters = filters.map((filter) => {
+					filter.id = randomId()
+					filter.tests.map((test) => {
+						test.id = randomId()
+						return test
+					})
+					filter.actions.map((action) => {
+						action.id = randomId()
+						return action
+					})
+					return filter
+				})
+			})
+		},
+		async update(accountId) {
+			let filters = structuredClone(this.filters)
+			filters = filters.map((filter) => {
+				delete filter.id
+				filter.tests.map((test) => {
+					delete test.id
+					return test
+				})
+				filter.actions.map((action) => {
+					delete action.id
+					return action
+				})
+				return filter
+			})
+
+			await MailFilterService.updateFilters(accountId, filters)
+		},
+	},
+})
diff --git a/tests/Unit/Service/AllowedRecipientsServiceTest.php b/tests/Unit/Service/AllowedRecipientsServiceTest.php
new file mode 100644
index 0000000000..ad064d52de
--- /dev/null
+++ b/tests/Unit/Service/AllowedRecipientsServiceTest.php
@@ -0,0 +1,54 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace Unit\Service;
+
+use ChristophWurst\Nextcloud\Testing\TestCase;
+use OCA\Mail\Db\Alias;
+use OCA\Mail\Db\MailAccount;
+use OCA\Mail\Service\AliasesService;
+use OCA\Mail\Service\AllowedRecipientsService;
+use PHPUnit\Framework\MockObject\MockObject;
+
+class AllowedRecipientsServiceTest extends TestCase {
+
+	private AliasesService&MockObject $aliasesService;
+	private AllowedRecipientsService $allowedRecipientsService;
+
+	protected function setUp(): void {
+		parent::setUp();
+
+		$this->aliasesService = $this->createMock(AliasesService::class);
+		$this->allowedRecipientsService = new AllowedRecipientsService($this->aliasesService);
+	}
+
+	public function testGet(): void {
+		$alias1 = new Alias();
+		$alias1->setAlias('alias1@example.org');
+
+		$alias2 = new Alias();
+		$alias2->setAlias('alias2@example.org');
+
+		$this->aliasesService->expects(self::once())
+			->method('findAll')
+			->willReturn([$alias1, $alias2]);
+
+		$mailAccount = new MailAccount();
+		$mailAccount->setId(1);
+		$mailAccount->setUserId('user');
+		$mailAccount->setEmail('user@example.org');
+
+		$recipients = $this->allowedRecipientsService->get($mailAccount);
+
+		$this->assertCount(3, $recipients);
+		$this->assertEquals('user@example.org', $recipients[0]);
+		$this->assertEquals('alias1@example.org', $recipients[1]);
+		$this->assertEquals('alias2@example.org', $recipients[2]);
+	}
+}
diff --git a/tests/Unit/Service/MailFilter/FilterBuilderTest.php b/tests/Unit/Service/MailFilter/FilterBuilderTest.php
new file mode 100644
index 0000000000..5f2ce94c0a
--- /dev/null
+++ b/tests/Unit/Service/MailFilter/FilterBuilderTest.php
@@ -0,0 +1,65 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCA\Mail\Tests\Unit\Service\MailFilter;
+
+use ChristophWurst\Nextcloud\Testing\TestCase;
+use OCA\Mail\IMAP\ImapFlag;
+use OCA\Mail\Service\MailFilter\FilterBuilder;
+
+class FilterBuilderTest extends TestCase {
+	private FilterBuilder $builder;
+	private string $testFolder;
+
+	public function __construct(?string $name = null, array $data = [], $dataName = '') {
+		parent::__construct($name, $data, $dataName);
+		$this->testFolder = __DIR__ . '/../../../data/mail-filter/';
+	}
+
+	public function setUp(): void {
+		parent::setUp();
+		$this->builder = new FilterBuilder(new ImapFlag());
+	}
+
+	/**
+	 * @dataProvider dataBuild
+	 */
+	public function testBuild(string $testName): void {
+		$untouchedScript = '# Hello, this is a test';
+
+		$filters = json_decode(
+			file_get_contents($this->testFolder . $testName . '.json'),
+			true,
+			512,
+			JSON_THROW_ON_ERROR
+		);
+
+		$script = $this->builder->buildSieveScript($filters, $untouchedScript);
+
+		// the .sieve files have \r\n line endings
+		$script .= "\r\n";
+
+		$this->assertStringEqualsFile(
+			$this->testFolder . $testName . '.sieve',
+			$script
+		);
+	}
+
+	public function dataBuild(): array {
+		$files = glob($this->testFolder . 'builder*.json');
+		$tests = [];
+
+		foreach($files as $file) {
+			$filename = pathinfo($file, PATHINFO_FILENAME);
+			$tests[$filename] = [$filename];
+		}
+
+		return $tests;
+	}
+}
diff --git a/tests/Unit/Service/MailFilter/FilterParserTest.php b/tests/Unit/Service/MailFilter/FilterParserTest.php
new file mode 100644
index 0000000000..83e775df64
--- /dev/null
+++ b/tests/Unit/Service/MailFilter/FilterParserTest.php
@@ -0,0 +1,77 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace Unit\Service\MailFilter;
+
+use ChristophWurst\Nextcloud\Testing\TestCase;
+use OCA\Mail\Service\MailFilter\FilterParser;
+
+class FilterParserTest extends TestCase {
+	private FilterParser $filterParser;
+
+	private string $testFolder;
+
+	public function __construct(?string $name = null, array $data = [], $dataName = '') {
+		parent::__construct($name, $data, $dataName);
+		$this->testFolder = __DIR__ . '/../../../data/mail-filter/';
+	}
+
+	protected function setUp(): void {
+		parent::setUp();
+
+		$this->filterParser = new FilterParser();
+	}
+
+	public function testParse1(): void {
+		$script = file_get_contents($this->testFolder . 'parser1.sieve');
+
+		$state = $this->filterParser->parseFilterState($script);
+		$filters = $state->getFilters();
+
+		$this->assertCount(1, $filters);
+		$this->assertSame('Test 1', $filters[0]['name']);
+		$this->assertTrue($filters[0]['enable']);
+		$this->assertSame('allof', $filters[0]['operator']);
+		$this->assertSame(10, $filters[0]['priority']);
+
+		$this->assertCount(1, $filters[0]['tests']);
+		$this->assertSame('from', $filters[0]['tests'][0]['field']);
+		$this->assertSame('is', $filters[0]['tests'][0]['operator']);
+		$this->assertEquals(['alice@example.org', 'bob@example.org'], $filters[0]['tests'][0]['values']);
+
+		$this->assertCount(1, $filters[0]['actions']);
+		$this->assertSame('addflag', $filters[0]['actions'][0]['type']);
+		$this->assertSame('Alice and Bob', $filters[0]['actions'][0]['flag']);
+	}
+
+	public function testParse2(): void {
+		$script = file_get_contents($this->testFolder . 'parser2.sieve');
+
+		$state = $this->filterParser->parseFilterState($script);
+		$filters = $state->getFilters();
+
+		$this->assertCount(1, $filters);
+		$this->assertSame('Test 2', $filters[0]['name']);
+		$this->assertTrue($filters[0]['enable']);
+		$this->assertSame('anyof', $filters[0]['operator']);
+		$this->assertSame(20, $filters[0]['priority']);
+
+		$this->assertCount(2, $filters[0]['tests']);
+		$this->assertSame('subject', $filters[0]['tests'][0]['field']);
+		$this->assertSame('contains', $filters[0]['tests'][0]['operator']);
+		$this->assertEquals(['Project-A', 'Project-B'], $filters[0]['tests'][0]['values']);
+		$this->assertSame('from', $filters[0]['tests'][1]['field']);
+		$this->assertSame('is', $filters[0]['tests'][1]['operator']);
+		$this->assertEquals(['john@example.org'], $filters[0]['tests'][1]['values']);
+
+		$this->assertCount(1, $filters[0]['actions']);
+		$this->assertSame('fileinto', $filters[0]['actions'][0]['type']);
+		$this->assertSame('Test Data', $filters[0]['actions'][0]['mailbox']);
+	}
+}
diff --git a/tests/Unit/Service/OutOfOfficeServiceTest.php b/tests/Unit/Service/OutOfOfficeServiceTest.php
index 1e3aa91ec7..d2afbb7631 100644
--- a/tests/Unit/Service/OutOfOfficeServiceTest.php
+++ b/tests/Unit/Service/OutOfOfficeServiceTest.php
@@ -151,11 +151,11 @@ public function testUpdateFromSystemWithEnabledOutOfOffice(?IOutOfOfficeData $da
 				['email@domain.com'],
 			)
 			->willReturn('# new sieve script');
-		$aliasesService = $this->serviceMock->getParameter('aliasesService');
-		$aliasesService->expects(self::once())
-			->method('findAll')
-			->with(1, 'user')
-			->willReturn([]);
+		$allowedRecipientsService = $this->serviceMock->getParameter('allowedRecipientsService');
+		$allowedRecipientsService->expects(self::once())
+			->method('get')
+			->with($mailAccount)
+			->willReturn(['email@domain.com']);
 		$sieveService->expects(self::once())
 			->method('updateActiveScript')
 			->with('user', 1, '# new sieve script');
@@ -229,11 +229,11 @@ public function testUpdateFromSystemWithDisabledOutOfOffice(?IOutOfOfficeData $d
 				['email@domain.com'],
 			)
 			->willReturn('# new sieve script');
-		$aliasesService = $this->serviceMock->getParameter('aliasesService');
-		$aliasesService->expects(self::once())
-			->method('findAll')
-			->with(1, 'user')
-			->willReturn([]);
+		$allowedRecipientsService = $this->serviceMock->getParameter('allowedRecipientsService');
+		$allowedRecipientsService->expects(self::once())
+			->method('get')
+			->with($mailAccount)
+			->willReturn(['email@domain.com']);
 		$sieveService->expects(self::once())
 			->method('updateActiveScript')
 			->with('user', 1, '# new sieve script');
diff --git a/tests/data/mail-filter/builder1.json b/tests/data/mail-filter/builder1.json
new file mode 100644
index 0000000000..35ac4a6709
--- /dev/null
+++ b/tests/data/mail-filter/builder1.json
@@ -0,0 +1,24 @@
+[
+	{
+		"name": "Test 1",
+		"enable": true,
+		"operator": "allof",
+		"tests": [
+			{
+				"operator": "is",
+				"values": [
+					"alice@example.org",
+					"bob@example.org"
+				],
+				"field": "from"
+			}
+		],
+		"actions": [
+			{
+				"type": "addflag",
+				"flag": "Alice and Bob"
+			}
+		],
+		"priority": 10
+	}
+]
diff --git a/tests/data/mail-filter/builder1.sieve b/tests/data/mail-filter/builder1.sieve
new file mode 100644
index 0000000000..d20750752a
--- /dev/null
+++ b/tests/data/mail-filter/builder1.sieve
@@ -0,0 +1,11 @@
+### Nextcloud Mail: Filters ### DON'T EDIT ###
+require ["imap4flags"];
+### Nextcloud Mail: Filters ### DON'T EDIT ###
+# Hello, this is a test
+### Nextcloud Mail: Filters ### DON'T EDIT ###
+# FILTER: [{"name":"Test 1","enable":true,"operator":"allof","tests":[{"operator":"is","values":["alice@example.org","bob@example.org"],"field":"from"}],"actions":[{"type":"addflag","flag":"Alice and Bob"}],"priority":10}]
+# Test 1
+if address :is :all "From" ["alice@example.org", "bob@example.org"] {
+addflag "$alice_and_bob";
+}
+### Nextcloud Mail: Filters ### DON'T EDIT ###
diff --git a/tests/data/mail-filter/builder2.json b/tests/data/mail-filter/builder2.json
new file mode 100644
index 0000000000..d431502edc
--- /dev/null
+++ b/tests/data/mail-filter/builder2.json
@@ -0,0 +1,31 @@
+[
+	{
+		"name": "Test 2",
+		"enable": true,
+		"operator": "anyof",
+		"tests": [
+			{
+				"operator": "contains",
+				"values": [
+					"Project-A",
+					"Project-B"
+				],
+				"field": "subject"
+			},
+			{
+				"operator": "is",
+				"values": [
+					"john@example.org"
+				],
+				"field": "from"
+			}
+		],
+		"actions": [
+			{
+				"type": "fileinto",
+				"mailbox": "Test Data"
+			}
+		],
+		"priority": "20"
+	}
+]
diff --git a/tests/data/mail-filter/builder2.sieve b/tests/data/mail-filter/builder2.sieve
new file mode 100644
index 0000000000..683739fc83
--- /dev/null
+++ b/tests/data/mail-filter/builder2.sieve
@@ -0,0 +1,11 @@
+### Nextcloud Mail: Filters ### DON'T EDIT ###
+require ["fileinto"];
+### Nextcloud Mail: Filters ### DON'T EDIT ###
+# Hello, this is a test
+### Nextcloud Mail: Filters ### DON'T EDIT ###
+# FILTER: [{"name":"Test 2","enable":true,"operator":"anyof","tests":[{"operator":"contains","values":["Project-A","Project-B"],"field":"subject"},{"operator":"is","values":["john@example.org"],"field":"from"}],"actions":[{"type":"fileinto","mailbox":"Test Data"}],"priority":20}]
+# Test 2
+if anyof (header :contains "Subject" ["Project-A", "Project-B"], address :is :all "From" ["john@example.org"]) {
+fileinto "Test Data";
+}
+### Nextcloud Mail: Filters ### DON'T EDIT ###
diff --git a/tests/data/mail-filter/builder3.json b/tests/data/mail-filter/builder3.json
new file mode 100644
index 0000000000..dd7b4583d7
--- /dev/null
+++ b/tests/data/mail-filter/builder3.json
@@ -0,0 +1,55 @@
+[
+	{
+		"name": "Test 3.1",
+		"enable": true,
+		"operator": "anyof",
+		"tests": [
+			{
+				"operator": "contains",
+				"values": [
+					"Project-A",
+					"Project-B"
+				],
+				"field": "subject"
+			},
+			{
+				"operator": "is",
+				"values": [
+					"john@example.org"
+				],
+				"field": "from"
+			}
+		],
+		"actions": [
+			{
+				"type": "fileinto",
+				"mailbox": "Test Data"
+			},
+			{
+				"type": "stop"
+			}
+		],
+		"priority": "20"
+	},
+	{
+		"name": "Test 3.2",
+		"enable": true,
+		"operator": "allof",
+		"tests": [
+			{
+				"operator": "contains",
+				"values": [
+					"@example.org"
+				],
+				"field": "to"
+			}
+		],
+		"actions": [
+			{
+				"type": "addflag",
+				"flag": "Test A"
+			}
+		],
+		"priority": 30
+	}
+]
diff --git a/tests/data/mail-filter/builder3.sieve b/tests/data/mail-filter/builder3.sieve
new file mode 100644
index 0000000000..71c197d181
--- /dev/null
+++ b/tests/data/mail-filter/builder3.sieve
@@ -0,0 +1,16 @@
+### Nextcloud Mail: Filters ### DON'T EDIT ###
+require ["fileinto", "imap4flags"];
+### Nextcloud Mail: Filters ### DON'T EDIT ###
+# Hello, this is a test
+### Nextcloud Mail: Filters ### DON'T EDIT ###
+# FILTER: [{"name":"Test 3.1","enable":true,"operator":"anyof","tests":[{"operator":"contains","values":["Project-A","Project-B"],"field":"subject"},{"operator":"is","values":["john@example.org"],"field":"from"}],"actions":[{"type":"fileinto","mailbox":"Test Data"},{"type":"stop"}],"priority":20},{"name":"Test 3.2","enable":true,"operator":"allof","tests":[{"operator":"contains","values":["@example.org"],"field":"to"}],"actions":[{"type":"addflag","flag":"Test A"}],"priority":30}]
+# Test 3.1
+if anyof (header :contains "Subject" ["Project-A", "Project-B"], address :is :all "From" ["john@example.org"]) {
+fileinto "Test Data";
+stop;
+}
+# Test 3.2
+if address :contains :all "To" ["@example.org"] {
+addflag "$test_a";
+}
+### Nextcloud Mail: Filters ### DON'T EDIT ###
diff --git a/tests/data/mail-filter/builder4.json b/tests/data/mail-filter/builder4.json
new file mode 100644
index 0000000000..c02d4c469d
--- /dev/null
+++ b/tests/data/mail-filter/builder4.json
@@ -0,0 +1,15 @@
+[
+	{
+		"actions": [
+			{
+				"flag": "Flag 123",
+				"type": "addflag"
+			}
+		],
+		"enable": true,
+		"name": "Test 4",
+		"operator": "allof",
+		"priority": 60,
+		"tests": []
+	}
+]
diff --git a/tests/data/mail-filter/builder4.sieve b/tests/data/mail-filter/builder4.sieve
new file mode 100644
index 0000000000..2877d7de01
--- /dev/null
+++ b/tests/data/mail-filter/builder4.sieve
@@ -0,0 +1,6 @@
+# Hello, this is a test
+### Nextcloud Mail: Filters ### DON'T EDIT ###
+# FILTER: [{"actions":[{"flag":"Flag 123","type":"addflag"}],"enable":true,"name":"Test 4","operator":"allof","priority":60,"tests":[]}]
+# Test 4
+# No valid tests found
+### Nextcloud Mail: Filters ### DON'T EDIT ###
diff --git a/tests/data/mail-filter/builder5.json b/tests/data/mail-filter/builder5.json
new file mode 100644
index 0000000000..9cc8c89f45
--- /dev/null
+++ b/tests/data/mail-filter/builder5.json
@@ -0,0 +1,27 @@
+[
+	{
+		"actions": [
+			{
+				"flag": "Report",
+				"type": "addflag"
+			},
+			{
+				"flag": "To read",
+				"type": "addflag"
+			}
+		],
+		"enable": true,
+		"name": "Test 5",
+		"operator": "allof",
+		"priority": 10,
+		"tests": [
+			{
+				"field": "subject",
+				"operator": "matches",
+				"values": [
+					"work*report"
+				]
+			}
+		]
+	}
+]
diff --git a/tests/data/mail-filter/builder5.sieve b/tests/data/mail-filter/builder5.sieve
new file mode 100644
index 0000000000..8aad19b928
--- /dev/null
+++ b/tests/data/mail-filter/builder5.sieve
@@ -0,0 +1,12 @@
+### Nextcloud Mail: Filters ### DON'T EDIT ###
+require ["imap4flags"];
+### Nextcloud Mail: Filters ### DON'T EDIT ###
+# Hello, this is a test
+### Nextcloud Mail: Filters ### DON'T EDIT ###
+# FILTER: [{"actions":[{"flag":"Report","type":"addflag"},{"flag":"To read","type":"addflag"}],"enable":true,"name":"Test 5","operator":"allof","priority":10,"tests":[{"field":"subject","operator":"matches","values":["work*report"]}]}]
+# Test 5
+if header :matches "Subject" ["work*report"] {
+addflag "$report";
+addflag "$to_read";
+}
+### Nextcloud Mail: Filters ### DON'T EDIT ###
diff --git a/tests/data/mail-filter/builder6.json b/tests/data/mail-filter/builder6.json
new file mode 100644
index 0000000000..82c8131c1c
--- /dev/null
+++ b/tests/data/mail-filter/builder6.json
@@ -0,0 +1,36 @@
+[
+	{
+		"actions": [
+			{
+				"mailbox": "Test Data",
+				"type": "fileinto"
+			},
+			{
+				"flag": "Projects\\Reporting",
+				"type": "addflag"
+			}
+		],
+		"enable": true,
+		"name": "Test 6",
+		"operator": "anyof",
+		"priority": 10,
+		"tests": [
+			{
+				"field": "subject",
+				"operator": "is",
+				"values": [
+					"\"Project-A\"",
+					"Project\\A"
+				]
+			},
+			{
+				"field": "subject",
+				"operator": "is",
+				"values": [
+					"\"Project-B\"",
+					"Project\\B"
+				]
+			}
+		]
+	}
+]
diff --git a/tests/data/mail-filter/builder6.sieve b/tests/data/mail-filter/builder6.sieve
new file mode 100644
index 0000000000..e5a756d66e
--- /dev/null
+++ b/tests/data/mail-filter/builder6.sieve
@@ -0,0 +1,12 @@
+### Nextcloud Mail: Filters ### DON'T EDIT ###
+require ["fileinto", "imap4flags"];
+### Nextcloud Mail: Filters ### DON'T EDIT ###
+# Hello, this is a test
+### Nextcloud Mail: Filters ### DON'T EDIT ###
+# FILTER: [{"actions":[{"mailbox":"Test Data","type":"fileinto"},{"flag":"Projects\\Reporting","type":"addflag"}],"enable":true,"name":"Test 6","operator":"anyof","priority":10,"tests":[{"field":"subject","operator":"is","values":["\"Project-A\"","Project\\A"]},{"field":"subject","operator":"is","values":["\"Project-B\"","Project\\B"]}]}]
+# Test 6
+if anyof (header :is "Subject" ["\"Project-A\"", "Project\\A"], header :is "Subject" ["\"Project-B\"", "Project\\B"]) {
+fileinto "Test Data";
+addflag "$projects\\reporting";
+}
+### Nextcloud Mail: Filters ### DON'T EDIT ###
diff --git a/tests/data/mail-filter/parser1.sieve b/tests/data/mail-filter/parser1.sieve
new file mode 100644
index 0000000000..d20750752a
--- /dev/null
+++ b/tests/data/mail-filter/parser1.sieve
@@ -0,0 +1,11 @@
+### Nextcloud Mail: Filters ### DON'T EDIT ###
+require ["imap4flags"];
+### Nextcloud Mail: Filters ### DON'T EDIT ###
+# Hello, this is a test
+### Nextcloud Mail: Filters ### DON'T EDIT ###
+# FILTER: [{"name":"Test 1","enable":true,"operator":"allof","tests":[{"operator":"is","values":["alice@example.org","bob@example.org"],"field":"from"}],"actions":[{"type":"addflag","flag":"Alice and Bob"}],"priority":10}]
+# Test 1
+if address :is :all "From" ["alice@example.org", "bob@example.org"] {
+addflag "$alice_and_bob";
+}
+### Nextcloud Mail: Filters ### DON'T EDIT ###
diff --git a/tests/data/mail-filter/parser2.sieve b/tests/data/mail-filter/parser2.sieve
new file mode 100644
index 0000000000..10e91a2543
--- /dev/null
+++ b/tests/data/mail-filter/parser2.sieve
@@ -0,0 +1,11 @@
+### Nextcloud Mail: Filters ### DON'T EDIT ###
+require ["fileinto"];
+### Nextcloud Mail: Filters ### DON'T EDIT ###
+# Hello, this is a test
+### Nextcloud Mail: Filters ### DON'T EDIT ###
+# FILTER: [{"name":"Test 2","enable":true,"operator":"anyof","tests":[{"operator":"contains","values":["Project-A","Project-B"],"field":"subject"},{"operator":"is","values":["john@example.org"],"field":"from"}],"actions":[{"type":"fileinto","flag":"","mailbox":"Test Data"}],"priority":20}]
+# Test 2
+if anyof (header :contains "Subject" ["Project-A", "Project-B"], address :is :all "From" ["john@example.org"]) {
+fileinto "Test Data";
+}
+### Nextcloud Mail: Filters ### DON'T EDIT ###