IMAP doesn't work

[jonas-krug]

I have the right creds inserted into config.php

'user_backends' => array(
    array(
        'class' => '\OCA\UserExternal\IMAP',
        'arguments' => array(
            'IMAP-DOMAIN', 993, 'tls', null, true, false
        ),
    ),
  ),

I got the following error, if I try to login with creds from Dovecot/Postfix:

ERROR: Could not connect to imap server via curl: Operation timed out after 10001 milliseconds with 0 out of 0 bytes received

This works:

curl -v -u 'MAIL:PW' imaps://SERVER/INBOX?NEW

After reload Nextcloud I get everytime following "Warning":

Can not determine user count for OCA\UserExternal\IMAP

Server configuration

User External App version: 3.2.0

Operating system: Ubuntu 20.04

Web server: apache2 - 2.4.41

Database: mariadb 10.3

PHP version: 8.2.9

Nextcloud version: 27.0.2

List of activated apps:

App list

  - activity: 2.19.0
  - announcementcenter: 6.6.2
  - bruteforcesettings: 2.7.0
  - calendar: 4.4.4
  - circles: 27.0.1
  - cloud_federation_api: 1.10.0
  - comments: 1.17.0
  - contacts: 5.3.2
  - contactsinteraction: 1.8.0
  - dashboard: 7.7.0
  - dav: 1.27.0
  - encryption: 2.15.0
  - federatedfilesharing: 1.17.0
  - federation: 1.17.0
  - files: 1.22.0
  - files_antivirus: 5.2.1
  - files_automatedtagging: 1.17.0
  - files_pdfviewer: 2.8.0
  - files_rightclick: 1.6.0
  - files_sharing: 1.19.0
  - files_trashbin: 1.17.0
  - files_versions: 1.20.0
  - firstrunwizard: 2.16.0
  - groupfolders: 15.0.2
  - logreader: 2.12.0
  - lookup_server_connector: 1.15.0
  - nextcloud_announcements: 1.16.0
  - notifications: 2.15.0
  - oauth2: 1.15.1
  - password_policy: 1.17.0
  - photos: 2.3.0
  - privacy: 1.11.0
  - provisioning_api: 1.17.0
  - quota_warning: 1.17.0
  - recommendations: 1.6.0
  - related_resources: 1.2.0
  - richdocuments: 8.1.1
  - richdocumentscode: 23.5.202
  - serverinfo: 1.17.0
  - settings: 1.9.0
  - sharebymail: 1.17.0
  - socialsharing_email: 2.6.0
  - support: 1.10.0
  - survey_client: 1.15.0
  - suspicious_login: 5.0.0
  - systemtags: 1.17.0
  - text: 3.8.0
  - theming: 2.2.0
  - twofactor_backupcodes: 1.16.0
  - twofactor_totp: 9.0.0
  - unroundedcorners: 1.0.9
  - updatenotification: 1.17.0
  - user_external: 3.2.0
  - user_status: 1.7.0
  - users_picker: 0.2.2
  - viewer: 2.1.0
  - weather_status: 1.7.0
  - workflowengine: 2.9.0

Nextcloud configuration:

Config report

{
    "system": {
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "***REMOVED SENSITIVE VALUE***"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "version": "27.0.2.1",
        "overwrite.cli.url": "https:\/\/cloud.krugson.net",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "theme": "",
        "loglevel": 2,
        "maintenance": false,
        "mysql.utf8mb4": true,
        "default_phone_region": "DE",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpmode": "smtp",
        "mail_sendmailmode": "smtp",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "587",
        "mail_smtpauth": 1,
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "memcache.local": "\\OC\\Memcache\\APCu",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 6379
        },
        "app_install_overwrite": [
            "apporder"
        ],
        "twofactor_enforced": "true",
        "twofactor_enforced_groups": [
            "admin"
        ],
        "twofactor_enforced_excluded_groups": [],
        "updater.secret": "***REMOVED SENSITIVE VALUE***",
        "user_backends": [
            {
                "class": "\\OCA\\UserExternal\\IMAP",
                "arguments": [
                    "***REMOVED SENSITIVE VALUE***",
                    993,
                    "tls",
                    null,
                    true,
                    false
                ]
            }
        ]
    }
}

[jonas-krug]

after first login, error not coming up again

[pierrecorsini]

@jonas-krug Any hint on the resolution of your issue ? I have the same problem.

[damnms]

also have the same problem, curl on the command line works like a charm

[nshah14285]

I faced the same problem, using Nextcloud 28.0.3, PHP 8.2.
Solved the issue by replacing 'tls' with 'ssl' in the settings and it worked.
I hope this helps you.