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From: Udo Rader (listudobestsolution.at)
Date: Mon Nov 30 2009 - 15:57:42 CST
I know, this issue has been discussed quite often, but nevertheless I am
just wondering if something was possible to circumvent the missing
list of recipients.
Imagine a situation where there is a main postfix gateway used for spam
defence, transporting successfully passed emails to their end points
defined in transport_maps.
Without knowledge about the valid email addresses that each transport
endpoint supports, the main gateway will just have to accept any email
address for any defined transport endpoint domain.
Now what I am wondering if it was possible that the main gateway used
the SMTP "VRFY" command with the transport endpoints before actually
sending a email to them.
That way we could get rid of the potentially huge relay_recipient_maps.
Is this doable?
Udo Rader, CTO