blacklisting not working

Matt Kettler mkettler at
Thu May 22 18:23:48 IST 2008

Raymond Norton wrote:
> I have this network blacklisted ( (using mysql), but it 
> keeps coming through. I have tried a few different variations to block 
> the whole 172.14 network, but its not working. The spammer also puts a # 
> sign in every subject. What would be the best way to blacklist them?

The best way? Assuming your server is the front-end MX for your domain, and not 
downstream of a forwarder, configure your MTA to 550 it durring the SMTP session 
prior to the start of the DATA phase. In sendmail, you'd do it with a REJECT 
entry in /etc/mail/access.

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