Edgar Fuss via Postfix-users:
> Hello,
>
> I'm looking for prior art on rejecting mails to expired accounts
> including a hint at the new address.
You could use the relocated_maps feature for this. This will reject
at RCPT TO time, with a hard-coded response "5.1.6 User has moved
to <address>".
You could also use transport_maps which gives more control over the text:
u...@example.com error:5.1.6 account no longer exists, try
<u...@else.wh.ere>
That is without the 5XX SMTP code. The Postfix SMTP server will
prepend a suitable value.
Wietse
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