From: Victor Duchovni (Victor.DuchovniMorganStanley.com)
Date: Tue Jul 18 2006 - 10:49:36 CDT

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On Tue, Jul 18, 2006 at 11:44:55AM -0400, Wietse Venema wrote:

> It would have to implement not only the input address rewriting
> that is currently done in cleanup and trivial-rewrite, but also
> the output address rewriting that happens in, for example, the
> local delivery agent (to maintain consistency between virtual(5)
> and local(8) aliases).

Perhaps another reason why address validation should stop at the input
to virtual expansion, verifying the validity of that address, and not
its expanded value, but in any case, I agree that map chains would
solve a different problem (more flexible maps). For accurate recipient
verification it seems that Postfix would have to do the work internally
by doing at least the 1-to-1 (canonical and masquerade) expansion in
smtpd(8) and perhaps also virtual(5) and perhaps aliases(5), but here
is some diversity of opinion.

--
        Viktor.

P.S. Morgan Stanley is looking for a New York City based, Senior Unix
     system/email administrator to architect and sustain the Unix email
     environment. If you are interested, please drop me a note.

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