There was an unexpected problem communicating with SMTP: Unexpected return code

[W0tch3r]

Hello,

i configured the smtp plugin correctly and the send of the test mail was successful.

I use the office 365 smtp with an application password.

But everytime i add a comment and the notification was send i get the following error:

There was an unexpected problem communicating with SMTP: Unexpected return code - Expected: 354, Got: 503 | 503 Bad sequence of commands

Although this error occurs, the email is sent correctly.

Any idea how do i can disable this error message or why is it happening.

Thank you all in advance :)