FYI I am using SM V15 (now 1 version behind), with Thunderbird and IMAP,  both LAN access via non-secure ports (143/25) and WAN access using SSL (993/465 - insecure ports are closed to the outside world) and am having no issues with these.

Hello! Sorry to hear you're having trouble connecting to your SmarterMail server. When you say that you did a change to the domain name - what do you mean here? Was the server moved to a new location, or did just the domain name change? Can you provide the host name of the newly configured mail server so that we can complete testing? Thanks in advance!

Hello,

Thank you for your replies. The server did not move to a different location, only the domain name was changed through Smartmail admin settings, Manage -> Options -> Rename domain name.

Currently, the server is mail.corgosonline.de, and that is original from the first configuration. But once i rename it, thunderbird doesn't login using the mail server configured, i.e. using the new name of the server.

Is that procedure correct for renaming a domain name? do I have to do some other things?

Best regards,

joao