Skip to content

Instantly share code, notes, and snippets.

@fduran

fduran/gist:1870498

Created February 20, 2012 18:25
Show Gist options
  • Star 0 You must be signed in to star a gist
  • Fork 0 You must be signed in to fork a gist
  • Save fduran/1870498 to your computer and use it in GitHub Desktop.
Save fduran/1870498 to your computer and use it in GitHub Desktop.
Download ZIP
Defending against Spam using Linux Postfix
Raw
gistfile1.txt
Defending against Spam using Linux Postfix
www.fduran.com
0) Consider outsourcing mail service
1) Spamassassin: good in its time, it's past its useful life since there are better options and it's a CPU hog.
2) Use black list servers, like Spamhaus and Spamcop:
In Posfix configuration file /etc/postfix/main.cf append:
smtpd_recipient_restrictions = ... reject_rbl_client zen.spamhaus.org reject_rbl_client bl.spamcop.net
This stops most spam before it's processed further by server.
3) If blacklist wasn't enough then you can also use greylisting: http://rimuhosting.com/knowledgebase/linux/mail/greylisting%20with%20postgrey
---
Somehow related: to check if your mail server is blaclisted: http://www.mxtoolbox.com/Public/Tools/Blacklists.aspx
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment