On 01/04/17 10:40, Kenneth Porter wrote: > What makes Postfix superior in fighting spam? One major feature that comes to mind is postscreen: http://www.postfix.org/POSTSCREEN_README.html http://www.postfix.org/postscreen.8.html > How do I integrate MIMEDefang, SpamAssassin, and ClamAV with Postfix? There are many guides online that tell you how to do this. > Are there migration guides for moving one's Sendmail anti-spam and AV > configurations to Postfix? Let me google that for you: http://lmgtfy.com/?q=sendmail+to+postfix Peter