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There are a few different approaches you can take. &nbsp;For example, sendmail configuration options can be set in order to disallow certain types of mail to pass through. &nbsp;Alternately, you can set up user-by-user filtering via procmail (which is often the default MDA - mail delivery agent - on RedHat and Mandrake systems). &nbsp;Check out <a href="http://www.procmail.org" rel="ugc">www.procmail.org</a>&nbsp;and also consult a comprehensive sendmail book for more details. &nbsp;You should run sendmail 8.9.x or newer if you are indeed using sendmail at your site, because of some new anti-spam-relay logic in the newer sendmail configuration.
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There are a few different approaches you can take.  For example, sendmail configuration options can be set in order to disallow certain types of mail to pass through.  Alternately, you can set up user-by-user filtering via procmail (which is often the default MDA - mail delivery agent - on RedHat and Mandrake systems).  Check out www.procmail.org [http://www.procmail.org] and also consult a comprehensive sendmail book for more details.  You should run sendmail 8.9.x or newer if you are indeed using sendmail at your site, because of some new anti-spam-relay logic in the newer sendmail configuration.

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I setup a Linux box to be my pop &amp;&nbsp;smtp server. &nbsp;I need to know an easy, yet effective way to implement a filtering program to stop spam.
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I setup a Linux box to be my pop & smtp server.  I need to know an easy, yet effective way to implement a filtering program to stop spam.

Linux Spam filtering

Linux is a UNIX-like open source operating system with hundreds of distinct distributions, including: Fedora, openSUSE, Ubuntu, Debian, Slackware, Gentoo, CentOS, and Arch Linux. Linux is generally associated with web and database servers, but has become popular in many niche industries and applications.