diff --git a/app/config/variables.php b/app/config/variables.php
index ffc3cb998d..13bde2d04f 100644
--- a/app/config/variables.php
+++ b/app/config/variables.php
@@ -408,7 +408,7 @@ return [
             ],
             [
                 'name' => '_APP_SMTP_SECURE',
-                'description' => 'SMTP secure connection protocol. Empty by default, change to \'tls\' if running on a secure connection.',
+                'description' => 'SMTP secure connection protocol. Empty by default, change to \'tls\' or \'ssl\' if running on a secure connection.',
                 'introduction' => '',
                 'default' => '',
                 'required' => false,
diff --git a/app/controllers/api/projects.php b/app/controllers/api/projects.php
index 8314a21f30..9e08c3774a 100644
--- a/app/controllers/api/projects.php
+++ b/app/controllers/api/projects.php
@@ -1446,7 +1446,7 @@ App::patch('/v1/projects/:projectId/smtp')
     ->param('port', 587, new Integer(), 'SMTP server port', true)
     ->param('username', '', new Text(0, 0), 'SMTP server username', true)
     ->param('password', '', new Text(0, 0), 'SMTP server password', true)
-    ->param('secure', '', new WhiteList(['tls'], true), 'Does SMTP server use secure connection', true)
+    ->param('secure', '', new WhiteList(['tls', 'ssl'], true), 'Does SMTP server use secure connection', true)
     ->inject('response')
     ->inject('dbForConsole')
     ->action(function (string $projectId, bool $enabled, string $senderName, string $senderEmail, string $replyTo, string $host, int $port, string $username, string $password, string $secure, Response $response, Database $dbForConsole) {