diff --git a/core/nginx/conf/nginx.conf b/core/nginx/conf/nginx.conf
index 82e7ca36..9ce12980 100644
--- a/core/nginx/conf/nginx.conf
+++ b/core/nginx/conf/nginx.conf
@@ -307,7 +307,7 @@ mail {
       starttls only;
       {% endif %}
       protocol smtp;
-      smtp_auth plain;
+      smtp_auth plain login;
       auth_http_header Auth-Port 587;
     }
 
@@ -316,7 +316,7 @@ mail {
       listen 465 ssl;
       listen [::]:465 ssl;
       protocol smtp;
-      smtp_auth plain;
+      smtp_auth plain login;
       auth_http_header Auth-Port 465;
     }