Postfix Enabler can help Mac OS X users set up a totally functional buzzword-compliant mail server in less than a minute, the Mac Way. It sets up SMTP, POP3 and IMAP services, with or without SSL support. It even sets up SSL test certs so that you can test the SSL connection. It enables SASL Authentication so you can connect to ISPs who require the SMTP connection to be authenticated. Or, the other way around, it allows you to turn on SMTP-AUTH on the server, so you can authorise remote users who need to send mail through it. Plus, it has a few other features, including the ability to set up a roving SMTP server for PowerBook users to send mail wherever they are, whenever they want, so long as they have an Internet connection.
What is new in this release:
Added a radio button (the Relay Mail button in the Mail Server panel) for the user to make sure that the server is not acting as an Open Relay when it's placed directly on a broadband line, as opposed to being behind a router or Airport Base Station.