From: Victor Duchovni (Victor.Duchovnimorganstanley.com)
Date: Tue May 13 2008 - 15:56:54 CDT

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On Tue, May 13, 2008 at 02:13:11PM -0400, Joey wrote:

> > > sendmail -f colvdiyfqnaturalfoodchain.com \
> > > testaccountclientserver.net < testfile
> > >
> > > This times out sending to the exchange server.
> >
> > Now we're getting somewhere. So this means exchange can't handle
> > domains that have "many" MX records.

When I do the same test sending to our Exchange (2003) servers the
delivery is immediate (40 ms latency):

    2008-05-13T16:45:51-0400 amnesiac postfix-out/pickup[15319]:
            4B34548008: uid=0 from=<colvdiyfqnaturalfoodchain.com>
    2008-05-13T16:45:51-0400 amnesiac postfix-out/cleanup[2089]:
            4B34548008: message-id=<20080513204551.4B34548008amnesiac.example.com>
    2008-05-13T16:45:51-0400 amnesiac postfix-out/qmgr[8991]:
            4B34548008: from=<colvdiyfqnaturalfoodchain.com>,
        size=328, nrcpt=1 (queue active)
    2008-05-13T16:45:51-0400 amnesiac postfix-out/smtp[1267]:
            4B34548008: to=<viktorexchange.example.com>,
        relay=exchange.example.com[192.0.2.1]:25,
        delay=35, delays=34/0/0.01/0.04, dsn=2.6.0, status=sent
        (250 2.6.0 <20080513204551.4B34548008amnesiac.example.com>
        Queued mail for delivery)
    2008-05-13T16:45:51-0400 amnesiac postfix-out/qmgr[8991]:
            4B34548008: removed

Perhaps the exchange servers you are sending to are doing SPF checks or
other things they should not be doing when they are not edge servers (or
at all).

--
        Viktor.

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