diff --git a/snappymail/v/0.0.0/app/libraries/MailSo/Smtp/SmtpClient.php b/snappymail/v/0.0.0/app/libraries/MailSo/Smtp/SmtpClient.php
index 9c745119f..1e3097e63 100644
--- a/snappymail/v/0.0.0/app/libraries/MailSo/Smtp/SmtpClient.php
+++ b/snappymail/v/0.0.0/app/libraries/MailSo/Smtp/SmtpClient.php
@@ -120,7 +120,9 @@ class SmtpClient extends \MailSo\Net\NetClient
 		$sPassword = $aCredentials['Password'];
 
 		$type = '';
-		array_unshift($aCredentials['SASLMechanisms'],'LOGIN');
+		// https://github.com/the-djmaze/snappymail/pull/423
+//		$aCredentials['SASLMechanisms'][] = 'LOGIN';
+		\array_unshift($aCredentials['SASLMechanisms'], 'LOGIN');
 		foreach ($aCredentials['SASLMechanisms'] as $sasl_type) {
 			if ($this->IsAuthSupported($sasl_type) && \SnappyMail\SASL::isSupported($sasl_type)) {
 				$type = $sasl_type;