[exim] Deny domains with nonexistent MX

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Autor: Odhiambo G. Washington
Data:  
Para: exim-users
Asunto: [exim] Deny domains with nonexistent MX
Hello,

Forgive me if I have missed an obvious answer to this in spec.txt.

What is the best way to deny smtp service to a sender_domain whose
MX records don't exist? I would like to do this even if the host is
in my +relay_from_hosts. For example, if I host a domain and I disable
dns entries for it, sender_addresses using that domain and are in my
+relay_from_hosts can still send mail via my server. I want to stop
that as well.
Other than listing them in a file and doing a lookup, is there another
straight way within exim, something close to what reverse_host_lookup,
but this time for MX only?



        cheers
       - wash 
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Odhiambo Washington                    . WANANCHI ONLINE LTD (Nairobi, KE)  |
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