Killing That Spam With Postgrey And Postfix. Ever heard of greylisting? There are numerous ways to prevent spam from reaching your inbox, the most popular is probably SpamAssassin. Greylisting will not replace spam filtering software like SA but it will serve as a powerful first hurdle for spam thus reducing the ammount of spam entering the system at all. It should rather be seen as an addition to all the other anti spam features of Postfix. Apart from the obvious benefit of reducing the ammount of spam in your inbox it will give your virus scanner and SpamAssassing less work to do. Greylisting in short means that when someone wants to deliver a mail to your mailserver it will simply reply “Please come back later�. Greylisting.org Greylisting on Wikipedia There are several implementations of greylisting and it can be done with most any server. I assume you have a working Postfix installation. If you use apt-get to install Postgrey the requirements will be handled automagically.
First we install the Postgrey package with : to //Erk. KnujOn. Debian Mail Server. By Joe Stump 09/25/2003 All Linux distributions that I know of come with an MTA of some sort. The most popular is Sendmail. Other popular MTAs include Exim, postfix, and Qmail. This article discusses how to build an advanced mail server which sports all of the latest mail protocols, checks all incoming mail for spam, and scans all incoming and outgoing mail for viruses.
We will use the able Qmail MTA for SMTP and POP3. We will use vpopmail for virtual domains and Courier IMAP for our IMAP server. You are assumed to have a working knowledge of Linux, though the steps outlined should work on most UNIX variants with little effort. MySQL Installing MySQL All of the distributions that I have worked with either supplied MySQL binaries on the CD or made them available somewhere on the web. Note: Debian users can apt-get the packages mysql-client and mysql-server. Creating the Database User Log into your MySQL server as root and type the following commands to create the database for vpopmail. OpenSSL.