hi I need an advice, my company use MS exchange 2003 for corperate email. I have a linux running sendmail 8.14 in the local LAN. I tried to send mail to internal network but I cannot receive it from my outlook client. How do I config sendmail server as SMTP to send mail internal LAN? it's no need to send outside world.

LAN users would normally connect direct to the internal mailserver and thus not use the MX records themselves. You could configure your internal DNS server to have a different MX record to your external DNS server if desired. You cqan configure routes/relays etc in hMail to accomplish exactly what you require. Are you planning on forwarding from the host to your internal server via SMTP? or will hMail pick the emails up from there over POP3? One of the ways I've previously accomplished the incoming mail route is to use a "dummy" subdomain between the hosts mailserver and the internal mailserver - this is transparent to all end users (whether internal or external) --- you can then set your firewall rules (or just hMail IP ranges) to only allow connections between the gateway server and internal server. If you set your MX record to 11.22.33.44 then your external emails wouldn't go via 1.2.3.4 as you request. http://www.pcfixreview.com