On Mon, Jul 03, 2006 at 06:43:43PM +0200, Anthony wrote:
> Hello.
>
> In order to prevent spam, I'd like Exim 4 (I run Debian) to reject
> incoming mail
> if sender's domain doesn't exist.
> What should be modified in the configuration files for this ?
you could switch on callout verification of senders, which
will test that the sender's address is deliverable, rather
than just that their domain exists -- add,
require verify = sender/callout
to the MAIL ACL. You could also check just that the
domain-part of the address exists with the dns lookup at
the same point, but I haven't an example to hand.
--
``Around 1,500 spectators turned up,... lured by the novel combination of
death, an elephant and electricity. Mercifully, Topsy died extremely quickly,
and without a trumpet, which may have had something to do with the carrots
laced with cyanide that she had been fed.'' (from The Economist)
