I cannot send or receive e-mail internally at all since I've installed this new exchange server. Is there anything I am missing here ? It's an out of the box install... I went out on register.com's site this past thursday and changed the mx records to point * to mydomainname.com which is pointing to my public IP address. I have a firewall in which I have enabled port 25 for smtp connections and redirected to my internal exchange server's IP address. My servername is serverMail.mydomainname.com I thought that the X400 protocol delivered all mail internally before trying to resolve anything outside of the domain ? However I am unable to send any e-mail to any users created in this new domain ????/ I had an smtp connector setup for internal and external mail, but deleted it and recreated and still get same results, no mail being delivered.....I've used Exchange 5.5 for years, but never used 2003. Any help would greatly be appreciated.