Replies to Tickets no longer possible after port change from 443 to 8443

Technical assistance
1

Infos:

  • Used Zammad version: 5.4.1
  • Used Zammad installation type: installation package
  • Operating system: Ubuntu 18.04 LTS
  • Browser + version: 8443 (SSL)

Expected behavior:

  • Replying to tickets should work despite port changeover

Actual behavior:

  • As soon as we change the port from 443 to 8443 and try to send a reply in a ticket, we get the following error message: Channel: Microsoft365::Account out Can’t use Channel::Driver::Smtp: #<Net::SMTPSyntaxError: 501 5.5.4 Invalid domain name [BE1P281CA0058.DEUP281.PROD.OUTLOOK.COM] > and Can’t use Channel::Driver::Smtp: #<Net::SMTPSyntaxError: Net::SMTPSyntaxError>

Bild1

2

I’d start with the error; “Invalid Domain Name”, as it states directly in your error.

3

Just a side note because I see people doing this:
The mails from Zammads notification channel do not support replies by agents.

While tricking sender addresses to ensure the answer is routed back to an existing channel, this is not behaving the way people expect. Especially not towards to your customer. Also note that this potentially leaks agent information (email address and personal signatures) and thus should be avoided.

It’s not supported by Zammad in any way.

4

The domain name is correct, what other steps can we try?

5

I’d check your azure application and make sure it’s pointing to the correct URL. I suspect if Zammad is on a new port, then your callback url is on a new port.

https://admin-docs.zammad.org/en/latest/settings/security/third-party/microsoft.html

6

We have checked it.

This is exactly the error, in Microsoft Azure the port can be changed to 8443 without problems. If we change the port in Zammad to 84435 it will cause the problem.

7

The notification sender is configured in the email settings.
By default it’s set to “fqdn” which in your case which ports obviously won’t be correct.

https://admin-docs.zammad.org/en/latest/channels/email/settings.html