Greylisting (WAS: Re: MailScanner ANNOUNCE: 4.57 released)

Nerijus Baliunas nerijus at
Sun Dec 3 13:11:35 GMT 2006

On Sun, 03 Dec 2006 08:39:39 +0000 "Michele Neylon :: Blacknight" <michele at> wrote:

> the milters are for sendmail afaik, while postfix has postgrey...

>From :

Postfix version 2.3 introduces support for the Sendmail version 8 Milter (mail filter) protocol. This protocol is used by applications that run outside the MTA to inspect SMTP events (CONNECT, DISCONNECT), SMTP commands (HELO, MAIL FROM, etc.) as well as mail content. All this happens before mail is queued.

The reason for adding Milter support to Postfix is that there exists a large collection of applications, not only to block unwanted mail, but also to verify authenticity (examples: SenderID+SPF and Domain keys) or to digitally sign mail (example: Domain keys). Having yet another Postfix-specific version of all that software is a poor use of human and system resources. 

So let's please stop arguing. Milter support for postfix is here and it will be used
more and more in the future.


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