Hi,
Some old domains still have their MX records pointing towards my server
but no more address. Their domain is not listed in relay_domains anymore.
When a server tries to send a message to a previously existing address,
it gets a 554 'Relay access denied' answer. I would like them get a more
friendly 550 let's say 'Sorry, this domain has no email service here'
I can change 554 to 550 with the relay_domains_reject_code, but as I do
not have a complete understanding of RFC 5321, I was wondering if
there's more adequate way to do this.
Vincent
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