It does not work to send email within our company between local users. Our OSX Server 10.6 always uses the SMTP relay to send messages, even though they are send to an account that is also on the server.
In Mail settings on the OSX server:
Domain Name is set to: style-xp.com
Hostname is set to: server.stylexp.int
SMTP is activated and the options for the external smtp relay are set.
What can we do, to keep mails within the company if they are send to local accounts? It is much easier, due to large files we have to send from one to each other.