rejecting botnets with sendmail

Res res at
Thu Nov 2 05:02:17 GMT 2006

On Wed, 1 Nov 2006, Rick Cooper wrote:

>> Sendmail works the identical way, its an "enhanced dnsbl" feature
> That which I listed above (hopefully correct syntax) was from sendmail. In
> my exim configuration it looks like
> deny  message  = rejected because $sender_host_address is in a black list \
> 				 at $dnslist_domain $dnslist_text
> hosts = !/somedir/Mail_local_net:!/somedir/mail_relay_from_hosts
> senders = !/somedir/Mail_sender_white_list.conf
> dnslists   = ${readfile{/somedir/mail_rbl_lists}{:}}
> Which says, basically, if the host is *not* in my local network list, and
> it's not a host I relay for and the sender is not in a special whitelist,
> then submit to the rbls listed in /somedir/mail_rbl_lists. If the host is
> already excluded the call is never made (wasted). The lists can be changed
> without having to do anything with exim, if the file changes exim reads it
> again, otherwise it's cached.

4 lines for what sendmail does by default compilation, whoa


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