I hope I'd be able to get this solved. I have exchange server 2003 set up on SBS 2003 premium edition, and just like the former. I'd want exchange to interface from my ISP hosting my email. The way exchange is configured goes thus: I have a local domain email address setup on the exchange for all users. The pop3 connector downloads emails from users mails from the ISP's server and distributes to the users exchange mailbox. The SMTP connector is setup to forward all outgoing emails to the ISP's server. 2 email addresses are setup on exchange 1. Internal domain name and 2. external domain name(which is the domain name registered with our ISP). The external email @mycompany.com is the primary address. This actually works well as exchange can send and recieve emails, only for the fact that emails at our external domain i.e our email domain @mycompany.com aren't routed out of the exchange server. The emails are delivered to the local exchange email box. This is a major concern as our exchange server is not up and running for 24 hours, so emails generated internally wouldn't be accessible by remote workers as soon as exchange server is down. Is it possible for emails at our domain be sent via the ISP and delivered to the mail server of our ISP and then it would accessible even after it has been downloaded by the pop3 connector as we intend to always leave a copy of our messages on the server.