diff --git a/api/src/Mail.php b/api/src/Mail.php
index 52ba7f4b40..b0ce372711 100644
--- a/api/src/Mail.php
+++ b/api/src/Mail.php
@@ -7171,4 +7171,21 @@ class Mail
 		error_log(__METHOD__.' ('.__LINE__.') '.' NOT DONE YET!' . ' hookValue = '. $_hookValues);
 
 	}
+
+	/**
+	 * This function gets array of email addresses in RFC822 format
+	 * and tries to normalize the addresses into only email addresses.
+	 *
+	 * @param array $_addresses Addresses
+	 */
+	static function stripRFC822Addresses ($_addresses)
+	{
+		$matches = array();
+		foreach ($_addresses as &$address)
+		{
+			preg_match("/<([^\'\" <>]+)>$/", $address, $matches);
+			if ($matches[1]) $address = $matches[1];
+		}
+		return $_addresses;
+	}
 }
diff --git a/mail/inc/class.mail_compose.inc.php b/mail/inc/class.mail_compose.inc.php
index b666ec9607..a4328a0834 100644
--- a/mail/inc/class.mail_compose.inc.php
+++ b/mail/inc/class.mail_compose.inc.php
@@ -2964,7 +2964,7 @@ class mail_compose
 					$smime_success = $this->_encrypt(
 						$mail,
 						$_formData['smime_encrypt'] == 'on'? Mail\Smime::TYPE_SIGN_ENCRYPT: Mail\Smime::TYPE_SIGN,
-						$_formData['to'],
+						Mail::stripRFC822Addresses($_formData['to']),
 						$identity['ident_email'],
 						$_formData['smime_passphrase']
 					);
@@ -2980,7 +2980,7 @@ class mail_compose
 					$smime_success =  $this->_encrypt(
 						$mail,
 						Mail\Smime::TYPE_ENCRYPT,
-						$_formData['to'],
+						Mail::stripRFC822Addresses($_formData['to']),
 						$identity['ident_email']
 					);
 				}