Can this be done? I have a construction company on our site, they utilize 1 of our 2 T1's to access there email through pop3/smtp, construction.com that is hosted on a site that just got blaclisted, dumbadministrator.org They can send all email but once on the dumbadministrator.org server it cannot go out. Our firewall and exchange is on the other T1, can i set it up so that their emails that they use our smtp to send email? When i change the smtp settings in outlook from mail.dumbadministrator.org to mail.ourserver.org I recieve an error that the email address is invalid. Is there anything I can do to assist them in sending email without putting them on our domain and giving them accounts?