We have the problem that the email notification contains an ip-adress. Since this is our internal adress, we would like mantis to use the external domain-name instead of the ip.
I assume that you are referring to the view bug link in the email.
This is derived from the server address provided by the web server (see $g_path around line 52 in config_defaults.php). Ideally, this is set through the apache server directive "ServerName".