diff --git a/src/mail.js b/src/mail.js
index b4aaa3569..0df3ea485 100644
--- a/src/mail.js
+++ b/src/mail.js
@@ -197,7 +197,7 @@ async function checkOutboundPort25() {
             relay.status = false;
             relay.value = `Connect to ${constants.PORT25_CHECK_SERVER} failed: ${error.message}. Check if port 25 (outbound) is blocked`;
             client.destroy();
-            relay.errorMessage = `Connect to ${constants.PORT25_CHECK_SERVER} failed.`;
+            relay.errorMessage = `Connect to ${constants.PORT25_CHECK_SERVER} failed: ${error.message}`;
             resolve(relay);
         });
     });