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Using procmail on mail relay

2007-10-21 06:41:53

I do understand procmail is a local delivery agent, but is there any way at all 
to use it to grab and redirect certain spams on a mail relay set up as follows:
 
1) MX1 = first relay used to filter via rbls only, then rest relayed to MX2
 
2) MX2 = 2nd relay used with spamassassin and ClamAV for more filtering,
         then rest to the various domains hosted on different servers
         -- no local users on MX2
 
Am using FBSD-6.2x/sendmail-8.13.8 and latest version of procmail.
 
I'm trying to eliminate the backscatter or blowback to MX1 from MX2 for 
rejected emails.
 
These MXes are handling about 100k emails daily.
 
I've tried various methods, but no joy.
 
Any tips appreciated.
 
Thanks,
Jack
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