My exim4 mail server sends notification using the wrong extension, I mean:
Mail Delivery System <Mailer-Daemon@mydomain.err>
This server is a multi-domain server and mydomain.err is one of managed domains but not the main one. I would like to set the main domain and the daemon address but I cannot find it in the configuration, I did a grep in all exim configuration looking for mydomain.err and I find it only here:
Where can I change the daemon address and the main domain?