Written by Chris Buechler and last updated on 01/27/2005 - [ freebsd ]

If you run a groupware email server on your LAN like Microsoft Exchange, Lotus Notes, or similar, setting up a secure mail forwarder is a good alternative to opening port 25 from the Internet directly to your LAN server. Typically with these servers, you don't want to put them on a DMZ segment for performance reasons, but you have to let in email from the Internet. Opening a port to these servers, and into your LAN, can be risky. The combination of Postfix and FreeBSD makes for a secure, low maintenance solution that just might help you sleep better at night.