postfix mail routing
I want to have Postfix route mail to two relays based on the sender. If the
sender is from domain1 then I want to use the relay that is authorised with
SPF for domain1, if the sender is from domain2 then I want to use the relay
that has SPF records for domain2.
Any ideas on how to do this?
Before anyone asks, for domain1 I don't control the DNS (can't add another IP
address to the SPF record) and also don't control the outbound mail server
(it will refuse to act as an outbound relay for mail from other domains).
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