From: Jack Browning (gdtrfb55gmail.com)
Date: Wed Jun 02 2010 - 01:48:26 CDT

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On Tue, Jun 1, 2010 at 6:17 PM, Wietse Venema <wietseporcupine.org> wrote:
> Jack Browning:

>> No address rewriting is occurring even though Postfix is invoking its
>> SMTP client to deliver the mail to the remote host, and my generic map
>> (after postmap and a reload) contains an entry like this:
>>
>> zzzzzzjnjroos.net    xxxxxxatt.net
>
> Sorry this is very incorrect.
>
> The from= line, logged by the queue manager, is not subject to SMTP
> generic mapping. It never was, and it never will.
>
> SMTP generic mapping is implemented in the Postfix SMTP client.
> This mapping is done only for information that is sent over the
> network.  This also explains why:
>
> 1) SMTP generic mapping has no effect on SASL password lookup.  It
> never did, and it never will.
>
> 2) SMTP generic mapping does not change with the destination host.
> It never did, and it never will.
>
>        Wietse

Live and learn. Since the fix suggested earlier in this thread --
keying the remote username:password entries to the users' local
addresses -- produces the desired result, the issue didn't involve
generic mapping at all. No generic mapping was done until the message
was actually sent to the remote server, and the message was not being
sent because the mis-keyed password lookup table resulted in bad (or
no) credentials being presented to the remote server, which rejected
the authentication attempt and terminated the session before the
message itself was transmitted. No transmission = no rewriting.

Anyway, that's my story, and I'm sticking to it.

JEB

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