Authentication Failed!

Infos:

  • Used Zammad version: 5.2.x
  • Used Zammad installation type: package
  • Operating system: Ubuntu 20.04
  • Browser + version: Chrome

Expected behavior:

Add a new mail succesfully.

Actual behavior:

More exactly, this error appear today, and it was unexpected, just start the below error on all the mails that I was trying to send:

Next to this, I was reading a lot of forums with this error and this was a old error on 2020.
I just tried to delete that email on zammad and tried to configure again but now I receive the below error:

I already verified the password, the email, I change the password and tried again but everything works bad :frowning:

It also appear with gmail accounts.

Steps to reproduce the behavior:

Just try to add a new email.