diff --git a/nextcloud/ns.config.php b/nextcloud/ns.config.php
index 056c877..f1dce32 100644
--- a/nextcloud/ns.config.php
+++ b/nextcloud/ns.config.php
@@ -7,3 +7,14 @@
    'check_for_working_wellknown_setup' => false,
    'log_type' => 'errorlog'
 );
+
+//verify the SMTP server self-signed certificate
+if (getenv('SMTP_TLS_VERIFY') === 'False' || getenv('SMTP_SECURE') === 'none') {
+   $CONFIG['mail_smtpstreamoptions'] = array(
+      'ssl' => array(
+         'allow_self_signed' => true,
+         'verify_peer' => false,
+         'verify_peer_name' => false
+      )
+   );
+}