diff --git a/Troubleshooting-Mail.md b/Troubleshooting-Mail.md
index 382b1a4..bc3ae70 100644
--- a/Troubleshooting-Mail.md
+++ b/Troubleshooting-Mail.md
@@ -11,6 +11,8 @@ In [Wekan v5.02](https://github.com/wekan/wekan/blob/master/CHANGELOG.md#v502-20
 
 [Source](https://github.com/wekan/wekan-snap/issues/151)
 
+This maybe requires setting per-application password in Google Account settings for Gmail.
+
 ```
 sudo snap set wekan mail-url='smtp://user@gmail.com:password@smtp.gmail.com:587'
 ```