diff --git a/Net/SMTP.php b/Net/SMTP.php
index 7b5a63f..38fbcab 100644
--- a/Net/SMTP.php
+++ b/Net/SMTP.php
@@ -199,6 +199,13 @@ class Net_SMTP
      */
     protected $gssapi_cname = null;
 
+    /**
+     * SCRAM SHA-Hash algorithm.
+     *
+     * @var string
+     */
+    protected $scram_sha_hash_algorithm = null;
+
     /**
      * Instantiates a new Net_SMTP object, overriding any defaults
      * with parameters that are passed in.
@@ -252,6 +259,11 @@ public function __construct($host = null, $port = null, $localhost = null,
         if (@include_once 'Auth/SASL.php') {
             $this->setAuthMethod('CRAM-MD5', array($this, 'authCramMD5'));
             $this->setAuthMethod('DIGEST-MD5', array($this, 'authDigestMD5'));
+            $this->setAuthMethod('SCRAM-SHA-1', array($this, 'authScramSHA1'));
+            $this->setAuthMethod('SCRAM-SHA-224', array($this, 'authScramSHA224'));
+            $this->setAuthMethod('SCRAM-SHA-256', array($this, 'authScramSHA256'));
+            $this->setAuthMethod('SCRAM-SHA-384', array($this, 'authScramSHA384'));
+            $this->setAuthMethod('SCRAM-SHA-512', array($this, 'authScramSHA512'));
         }
 
         /* These standard authentication methods are always available. */
@@ -1153,6 +1165,138 @@ public function authXOAuth2($uid, $token, $authz, $conn)
         return true;
     }
 
+
+
+
+    /**
+     * Authenticates the user using the SCRAM-SHA-1 method.
+     *
+     * @param string $uid   The userid to authenticate as.
+     * @param string $pwd   The password to authenticate with.
+     * @param string $authz The optional authorization proxy identifier.
+     *
+     * @return mixed Returns a PEAR_Error with an error message on any
+     *               kind of failure, or true on success.
+     * @since  1.11.0
+     */
+    protected function authScramSHA1($uid, $pwd, $authz = '')
+    {
+        $this->scram_sha_hash_algorithm = 'SCRAM-SHA-1';
+        return $this->authScramSHA($uid, $pwd, $authz);
+    }
+
+    /**
+     * Authenticates the user using the SCRAM-SHA-224 method.
+     *
+     * @param string $uid   The userid to authenticate as.
+     * @param string $pwd   The password to authenticate with.
+     * @param string $authz The optional authorization proxy identifier.
+     *
+     * @return mixed Returns a PEAR_Error with an error message on any
+     *               kind of failure, or true on success.
+     * @since  1.11.0
+     */
+    protected function authScramSHA224($uid, $pwd, $authz = '')
+    {
+        $this->scram_sha_hash_algorithm = 'SCRAM-SHA-224';
+        return $this->authScramSHA($uid, $pwd, $authz);
+    }
+
+    /**
+     * Authenticates the user using the SCRAM-SHA-256 method.
+     *
+     * @param string $uid   The userid to authenticate as.
+     * @param string $pwd   The password to authenticate with.
+     * @param string $authz The optional authorization proxy identifier.
+     *
+     * @return mixed Returns a PEAR_Error with an error message on any
+     *               kind of failure, or true on success.
+     * @since  1.11.0
+     */
+    protected function authScramSHA256($uid, $pwd, $authz = '')
+    {
+        $this->scram_sha_hash_algorithm = 'SCRAM-SHA-256';
+        return $this->authScramSHA($uid, $pwd, $authz);
+    }
+
+    /**
+     * Authenticates the user using the SCRAM-SHA-384 method.
+     *
+     * @param string $uid   The userid to authenticate as.
+     * @param string $pwd   The password to authenticate with.
+     * @param string $authz The optional authorization proxy identifier.
+     *
+     * @return mixed Returns a PEAR_Error with an error message on any
+     *               kind of failure, or true on success.
+     * @since  1.11.0
+     */
+    protected function authScramSHA384($uid, $pwd, $authz = '')
+    {
+        $this->scram_sha_hash_algorithm = 'SCRAM-SHA-384';
+        return $this->authScramSHA($uid, $pwd, $authz);
+    }
+
+    /**
+     * Authenticates the user using the SCRAM-SHA-512 method.
+     *
+     * @param string $uid   The userid to authenticate as.
+     * @param string $pwd   The password to authenticate with.
+     * @param string $authz The optional authorization proxy identifier.
+     *
+     * @return mixed Returns a PEAR_Error with an error message on any
+     *               kind of failure, or true on success.
+     * @since  1.11.0
+     */
+    protected function authScramSHA512($uid, $pwd, $authz = '')
+    {
+        $this->scram_sha_hash_algorithm = 'SCRAM-SHA-512';
+        return $this->authScramSHA($uid, $pwd, $authz);
+    }
+
+    /**
+     * Authenticates the user using the SCRAM-SHA method.
+     *
+     * @param string $uid   The userid to authenticate as.
+     * @param string $pwd   The password to authenticate with.
+     * @param string $authz The optional authorization proxy identifier.
+     *
+     * @return mixed Returns a PEAR_Error with an error message on any
+     *               kind of failure, or true on success.
+     * @since  1.11.0
+     */
+    protected function authScramSHA($uid, $pwd, $authz = '')
+    {
+        if (PEAR::isError($error = $this->put('AUTH', $this->scram_sha_hash_algorithm))) {
+            return $error;
+        }
+        /* 334: Continue authentication request */
+        if (PEAR::isError($error = $this->parseResponse(334))) {
+            /* 503: Error: already authenticated */
+            if ($this->code === 503) {
+                return true;
+            }
+            return $error;
+        }
+
+        $auth_sasl = new Auth_SASL;
+        $challenge = base64_decode($this->arguments[0]);
+        $cram      = $auth_sasl->factory($this->scram_sha_hash_algorithm);
+        $auth_str  = base64_encode($cram->getResponse($uid, $pwd, $challenge));
+
+        if (PEAR::isError($error = $this->put($auth_str))) {
+            return $error;
+        }
+
+        /* 235: Authentication successful */
+        if (PEAR::isError($error = $this->parseResponse(235))) {
+            return $error;
+        }
+    }
+
+
+
+
+
     /**
      * Send the HELO command.
      *