I just upgraded my network's (Windows Small Business Server 2003 with about 20 clients connected) firewall from a Sonicwall Soho3 to a Sonicwall TZ 190. I threw in all the configurations from the last firewall and everything seems to be working fine except i can't send e-mails! The network uses Exchange with Outlook 2003. I can receive them easily but when i try to send one i get the following error:
There was a SMTP communication problem with the recipient's email server. Please contact your system administrator. <mycompany.com #5.5.0 smtp;550 relaying mail to gmail.com is not allowed>
Now i figure it might be a DNS problem and i forgot to add a setting. There's just a billion more settings in the TZ then there was in the Soho. I've gone into the system manager > SMTP server and checked to make sure all the authentication settings are right. I know it has to do something with the firewall i just can't put my finger on the setting. If i plug the Soho3 back in everything works fine(incoming and outoing). Help is much appreciated!