Tcpwrappers, sendmail, and unknown hosts...

[Jeff Laine]

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.



-- 
Best regards,
Jeff

| "Nobody wants to say how this works.	|
|  Maybe nobody knows ..."		|
|  			Xorg.conf(5)	|