Sendmail: How does one blacklist annoying spammers?

Greg Woods woods at ucar.edu
Fri Jun 25 22:57:54 UTC 2010


On Fri, 2010-06-25 at 15:29 -0700, Daniel B. Thurman wrote:

> Are you talking about something like this from sendmail.mc:
> 
> FEATURE(`dnsbl', `relays.ordb.org', `"Rejected due to Open Relay see 
> http://www.ordb.org/lookup/?host=" $&{clientaddr} " for more 
> information"')dnl
> 

Yes, that is a DNS Block List (DNSBL). So is Spamhaus. There are a lot
of them out there.

--Greg





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