Re: [Exim] a spammer

If you just want to reject all mail with sender addresses in any domain
service by a specific set of nameservers, one way of accomplishing that
might be to block traffic to/from those nameservers at your border
router, and make sure you have sender_verify set.. Exim will be unable
to do the DNS lookup and will be unable to verify the sender address,
and will not accept it.. Its also possible you could use an option in
bind 8.x servers to list those servers as 'bogus'..

On Wed, 15 Nov 2000, Peter Radcliffe wrote:

> Dennis Taylor <ismgr@???> probably said:
> > A significant amount of spam comes from email addresses with domains like
> > "2die4.com", "myself.com", "soon.com", and other idiotic names. These are
> > all owned by inamecorp.com and serviced by their DNS servers (165.251.1.2
> > and .3). Smtp rejects always go to mail-intake-1.iname.net, where they're
> > rejected.
>
> This probably means that they're not real accounts, spammers make up
> random addresses to use as the sender address on their spam and
> because mail.com (nee iname) have _so_ many domains it'll be fairly
> likely that these random domains are registered to them.
>
> Part of mail.com's business is having all these domains so their users
> can pick their address from them.
>
> > What I'm wondering is, is there a way to A) detect that an incoming 'from'
> > address is served by the spamcorp dns servers, and reject it? and B) send
> > the reject straight to the inamecorp.com postmaster?
>
> I would strongly advise against doing that, especially the latter.
> You could legitimately be accused of spamming _them_, since they
> probably have nothing to do with 90% of the mail you get.
>
> P.
>
>

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