Ignacio Vazquez:
> transport_maps = hash:/etc/postfix/transport
> local_recipient_maps = $transport_maps, $virtual_mailbox_maps,
> $alias_maps, $alias_database

By design, transport maps decide how Postfix should DELIVER a
recipient.

By design, transport maps do not decide what recipients Postfix
should ACCEPT from random SMTP clients. Using transport maps for
that purpose is fundamentally unsafe.

It is safe to use transport maps to REJECT mail, for example by
resolving domains or recipients to the error: transport.

Just another blunt posting from Wietse's keyboard.

        Wietse

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