diff --git a/src/cron.js b/src/cron.js
index fc280fc7b..ad3c8252a 100644
--- a/src/cron.js
+++ b/src/cron.js
@@ -117,7 +117,7 @@ function recreateJobs(tz) {
 
     if (gJobs.systemChecks) gJobs.systemChecks.stop();
     gJobs.systemChecks = new CronJob({
-        cronTime: '00 30 * * * *', // every 30 minutes
+        cronTime: '00 30 * * * *', // every 30 minutes. if you change this interval, change the notification messages with correct duration
         onTick: cloudron.runSystemChecks,
         start: true,
         runOnInit: true, // run system check immediately
diff --git a/src/mail.js b/src/mail.js
index 503f4ce60..e56fb01a1 100644
--- a/src/mail.js
+++ b/src/mail.js
@@ -544,6 +544,8 @@ function checkConfiguration(callback) {
                 markdownMessage += '\n\n';
             });
 
+            markdownMessage += 'Email Status is checked every 30 minutes\n See the [troubleshooting docs](https://cloudron.io/documentation/troubleshooting/#mail-dns) for more information.\n';
+
             callback(null, markdownMessage);
         });
     });