The last post: Building your own mail server, Part 3

Adding some much-needed spam and virus filtering

FEATURE The story so far: Over the last two weeks, I've explained how you can set up a mail server to provide you with POP3 and IMAP services, for your own email, with some basic filtering of inbound connections, and the ability to connect to it and send emails from just about anywhere. This week, it's time to add more serious mail filtering tools to provide better protection against spam and viruses."