Jaroslaw Rafa via mailop skrev den 2023-03-05 20:45:
It's obvious to check MX for *recipient* domain, but not
for sender...
reject_mumble_sender is very hard ?, you have it as recipient, hmmp :)
tip dont accept mail for unknown domains, rfc 7505 does create this, but
keeps domain valid for homepages, just not for email
most defailt mta configs does not need custom restricktions for this to
work
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