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Date: Sat, 10 Oct 2009 19:43:57 -0500
From: Kevin Kinsey <kdk@daleco.biz>
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To: Jeff Laine <wtf.jlaine@gmail.com>, freebsd-questions@freebsd.org
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Subject: Re: Tcpwrappers, sendmail, and unknown hosts...
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Jeff Laine wrote:
> On Sat,10-10-2009 [12:31:01], Kevin Kinsey wrote:
>> Seems like a lot of the spam we fight comes from
>> hosts with no DNS entries.  What about using this?
>>
>> ----------------------------------
>> $grep sendmail /etc/hosts.allow
>>
>> sendmail : KNOWN : allow
>> sendmail : UNKNOWN : deny
>> ---------------------------------
>>
>> Comments?  anyone tried it?
>>
> 
> Hi Kevin!
> 
> What you need is 'require_rdns' feature.
> Also from my own expirience, dnsbl feature of 
 > Sendmail works great for spammers scum.

TYTY!  Bang-Smack-Out of the park.  Lemme
know where I can send {$beverage}.

Mail queue (Sendmail dual + amavid-new + spamassassin)
is down from 100+ to < 10 after adding that to .mc
and rebooting.  Thanks a bunch  :-)

Kevin Kinsey
DaleCo, S.P.