Re: Hashcash in Exim

"Eric S. Johansson" <[email protected]> Sat, 08 Sep 2007 09:10:17 -0400
Newsgroups gmane.mail.spam.hashcash
Message-ID <[email protected]>
Paul Schmidt wrote:
> Is there a way to generate Hashcash in Exim in the background?  I want 
> to do this for a single domain on our dedicated server, not all domains.

sadly there may be none.  you need an mta that lets you distinguish between 
inbound and outbound traffic.  I've faked it with postfix by using content or 
stamping filters on different port/address mappings (2 ip addresses:25 or 1 ip 
and ports 25/587.  when I last looked at exim, it only had a simple filter 
infrastructure suitable for inbound filtering only.  has this changed?

--- eric

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