From: Wietse Venema (wietseporcupine.org)
Date: Mon Mar 03 2003 - 11:50:22 CST

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Brian Johnson:
> I've been having trouble with ONE mailing list server (eg
> phpgroupware-usersgnu.org) that responds with:
>
> <phpgroupware-developersgnu.org>: host mx10.gnu.org[199.232.76.166] refused to
> talk to me: 501 Syntactically invalid HELO argument(s)
>
> I can post to other lists and individuals without problem
>
> Does anyone have any ideas what is happening?

Long ago there was this scientist Aristotle who made claims about
the number of legs of certain insects. The funny thing was, no-one
bothered checking his claims. It took almost a thousand years before
someone took the trouble to examine the insect and count its legs.

You can do a better job. You can actually log the SMTP conversation
and see with your own eyes what HELO command your machine is sending.
Once we have this information someone might actually be able to
figure out what the problem is.

See the DEBUG_README file for instructions.

        Wietse

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