Greetings,
I've been trying to figure out two things for my qmail boxes this morning,
though no luck so far with googling:
1) How to block all MX servers for a domain?
I'm getting inundated with large amounts of junk mail from various
mailservers owned by a large ISP. The mail can come from any number of
servers, like:
mx1.largeISP.com
mx2.largeISP.com
some_name_mx.largeISP.com
Is there a way I can universally block all incoming SMPT connections from
*.largeISP.com?
2) I'm setting up an additional mailserver and plan on migrating some
virtual domains from existing qmail server A to new qmail server B.
While I'll be updating MX records to make sure mail for these domains
flows to the correct MX server, there'll be a period of time where cached
DNS lookups cause mail for moved domains to still try to flow to server A.
Is there a way to get qmail on server A to forward mail for:
<any_user>@<moved_virtual_domain>.com
to
<any_user>@<moved_virual_domain>.com on server B?
In other words, forward all incoming mail for <moved_virtual_domain> on
server A to server B to avoid bounces and slow deliveries while the new
DNS info is propogating?
Many thanks in advance,
--Duncan
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