Killing That Spam With Postgrey And Postfix (HowtoForge)

Posted Jul 3, 2006 17:31 UTC (Mon) by freemars (subscriber, #4235)
Parent article: Killing That Spam With Postgrey And Postfix (HowtoForge)

If you want to use postgrey with virtual domains (particularly under Ubuntu) there's a howto I found useful at http://www.howtoforge.com/greylisting_postfix_postgrey

My experience is that Postgrey helps, but doesn't eliminate spam. The next step, imHo, might be software that detects emails to fake, 'bait' addresses and auto-adds that IP address to a local blacklist. Postgrey would help in this by delaying spam a few minutes -- maybe long enough so that spambot will send an email to one of your 'bait' addresses.

The most effectie way to generate spam to a 'bait' address is to submit it to the 'remove me' mechanism in any spam you get.

Killing That Spam With Postgrey And Postfix (HowtoForge)

Posted Jul 3, 2006 18:03 UTC (Mon) by mattdm (subscriber, #18) [Link]

Yeah; I had a similarly disappointing experience. It decreased the total volume of incoming spam somewhat, but had no measurable effect on that which was getting through SpamAssassin. Since I have plenty of CPU power for running SA, the annoyances of greylisting weren't worth the considerable drawbacks.