Issue Plesk Email Notifications sent as ATT00001.htm file

[JDev17]

Hi,

I am trying to fix my mail server. I am using Postfix and when Plesk sends me a notification e.g. "<mydomain.com> Notification of the customer creation" - the body is empty but the message is sent in an attachment called ATT00001.htm. Now after some research, this may be an Outlook problem but there is no solution documented on how to fix this for postfix and on another email account, the email won't even arrive...
Does this have anything to do with SSL? I secured the mail server with Let's encrypt.

PS: I don't have a revers ptr record but I don't think that this could cause the ATT00001.htm files...

Thank you in Advance
Jonas

 

[JDev17]

Nevermind, just found the answer, apparently its a known bug

 

[sebgonzes]

Nevermind, just found the answer, apparently its a known bug

Effectively, hope en early solution to this, but it's an know bug.