[Greylist-users] Exim Implementation

martin dempsey mjd at digitaleveryware.com
Mon Jun 23 12:42:41 PDT 2003

I've got a greylisting implementation working for exim processing email on a 
couple mailservers. Its done exactly according to Evan Harris's spec and 
currently supports all features execpt recipient domain whitelisting which 
hasn't been implemented yet (no immediate need). 

I had to quickly add code to allow matches from mailservers in the same /24 
subnet since matching only exact ip addresses was a problem in real life with 
some of the domains who were using multiple mailservers to send mail to users 
on my system.  Based on my experience, I don't think its wise to match the 
exact ip.

My implementation for exim uses exim 4's local_scan interface, so it is 
written in "C" and has to be compiled into the exim executable.  I am going 
to test it for a week or so. If you are interested in using it after that, 
let me know. I'll make the code available under the GPL for anyone to use or 

More information about the Greylist-users mailing list