Sendmail error mesage

Chris Kottaridis chriskot at
Thu Oct 25 10:41:57 PDT 2007

The output of my crontabs seem to be getting deferred. My nightly
backups are run out of operator's crontab.
The crontab has:

MAILTO chriskot at

I see this error message in the maillogs:

Oct 25 10:53:56 admin sm-mta[97771]: l9MJH0ZG068875:
to=<chriskot at>, ctladdr=<operator at admin.wagnerleader> (2/5), delay=2+21:36:56, xdelay=00:00:01, mailer=esmtp,
pri=12901052, [74.52.23
7.48], dsn=4.3.0, stat=Deferred: 451 Could not complete sender verify

What does "451 Could not complete sender verify callout" mean ?

    Chris Kottaridis   (chriskot at

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