One way to do this now would be to enable the normal verify_sender
checks, and then in your routers block port 53 (TCP and UDP) to the
offending nameservers (and their common secondaries). Since exim wants
to MX or A lookup on the domain, it will always reject the message with
"temporarily unable to verify sender"
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David J. Chiodo \ Microwave Systems \ Campbell Network Systems
<djc@???> <davec@???> \ 820 Monroe NW Ste 411
Domain Administrator <dns@???> \ Grand Rapids MI 49503
Customer Support <support@???> \ 616-774-3131 <info@???>
Fax 616-774-3933 Tollfree 1-888-694-INET http://www.cns.net
On Thu, 5 Mar 1998, Philip Hazel wrote:
> Date: Thu, 5 Mar 1998 14:16:38 +0000 (GMT)
> From: Philip Hazel <ph10@???>
> To: John Henders <jhenders@???>
> Cc: exim-users@???
> Subject: Re: [EXIM] Regular expressions for filtering.
>
> On Thu, 5 Mar 1998, John Henders wrote:
>
> > On another note, someone was telling me that there is a ruleset for
> > sendmail around that can be set to refuse mail based on who supplies dns
> > service for the domain. This would be very handy now as there are a lot
> > of services out there that are selling people a website and the spamming
> > software, handling the dns and having someone do the spamming from
> > random dialups. Could a lookup like this be wedged into the next (not
> > the upcoming) release of exim?
>
> Idea noted.
>
> --
> Philip Hazel University Computing Service,
> ph10@??? New Museums Site, Cambridge CB2 3QG,
> P.Hazel@??? England. Phone: +44 1223 334714
>
>
> --
> *** Exim information can be found at http://www.exim.org/ ***
>
>
--
*** Exim information can be found at
http://www.exim.org/ ***
