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Subject: Re: FW: schwabsignature message termination
From: Brad Knowles (blkskynet.be)
Date: Thu Jun 08 2000 - 11:35:24 CDT

At 12:01 PM -0400 2000/6/8, Mark Hoffman wrote:

> I have been dealing with an ISP who claims that Postfix is not sending a
> "CRLF . CRLF" to his mail exchanger to end the sent messages. Without
> verifying it myself, I am skeptical that this is the case, since I send out
> 250,000 emails a day from 10 Postfix servers, and he is the only one
> complaining. Attached is the email trail for your viewing pleasure.

        Note that mail for "sandybeach.com" is hosted by mail.netos.com,
which runs Post.Office v3.1.2. AT&T WorldNet is one other known
major customer of another product by the same company (InterMail
vM.4.01.02.39 201-229-119-122, according to
gateway1.worldnet.att.net/mtiwgwc25.worldnet.att.net), and I wouldn't
be surprised at all if many other software.com customers had similar
problems.

        Interestingly, the host acme-reston.va.rr.com reports "220
SMTP/cmap
ready_________________________________________________________________
_______________________________________________________", and only
when closing the connection does it then add "221
acme-reston.va.rr.com ESMTP server closing connection". Sigh....
More majorly broken dain-bramage.

        Of course, I won't even attempt to think about the kind of crap
MSN might be running.

> Has anyone else run into this?

        If everyone else in the world running postfix was having these
kinds of problems getting mail to sites like AT&T WorldNet, Road
Runner, or MSN, I can guarantee you that you would have heard about
it here.

        The fact that the problems seem to be sites like hotmail that
can't possibly handle the load that they've created for themselves,
would tend to indicate that the sorts of problems you're seeing just
aren't an issue with postfix.

        In fact, now that I think about it, I believe that it was after
Post.Office 3.1.2 that software.com added the "feature" that allowed
them to close the open relay hole. I'd be willing to bet that on top
of everything else, this guy is an open relay, too. 

--
   These are my opinions -- not to be taken as official Skynet policy
======================================================================
Brad Knowles, <blkskynet.be>                || Belgacom Skynet SA/NV
Systems Architect, Mail/News/FTP/Proxy Admin || Rue Colonel Bourg, 124
Phone/Fax: +32-2-706.13.11/12.49             || B-1140 Brussels
http://www.skynet.be                         || Belgium