SMTP Error When Replying to Ticket or Closing

Technical assistance
1

Currently have a M365 account setup for email handling. Getting the following error when trying to reply to tickets or any activity that generates a sent email.

"Can’t use Channel::Driver::Smtp: #<Net::SMTPAuthenticationError: 503 AUTH command used when not advertised > "

This is Zammad version 4.1.x (old, we know :frowning: )

2

Zammad 4.x way out of service. Upgrade asap and try again. There changed so much in the past years that it will be easier to upgrade and try again.

3

Firewall issue, resolved now…have it working now with Microsoft 365.

4

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