We have a mail server setup and the FQDN for the server is SERVERX.WINDOWSDOMAIN.LOCAL. The server responds to port 25 SMTP requests with that name. I would like to change it to respond with mail.ourinternetdomain.com instead of the .local name. The server is working and it is sending and receiving mail for "mail.ourinternetdomain.com", but I think this change is necessary to help us with SPAM (we use ORF). Is this change possible and how do I go about changing it?