Mail loop at a2000.nl (was Re: [HACKERS] PATCH for pgconnection.h)

Vince Vielhaber <vev(at)michvhf(dot)com> writes:
> Looks like someone's mailer reinjected this one.

Yes, along with five others that were also about two weeks old.
I recall having noticed several other such incidents in the recent
past, all bearing headers that indicate the retransmitted messages
originally went from the mail list to one <Z(dot)Nijmeyers(at)cable(dot)a2000(dot)nl>.

Start of reinjection of this one (note date):

Received: from hardy-1.a2000.nl ([127.0.0.1]) by hardy-1.a2000.nl
(Netscape Messaging Server 3.6) with SMTP id AAA5185;
Mon, 26 Jul 1999 13:34:05 +0200

Immediately prior Received: lines:

Received: from smtp1.a2000.nl ([192.168.17.19]) by hardy-1.a2000.nl
(Netscape Messaging Server 3.6) with ESMTP id AAT19D0
for <Z(dot)Nijmeyers(at)cable(dot)a2000(dot)nl>; Fri, 9 Jul 1999 06:48:41 +0200
Received: from hub.org ([209.167.229.1])
by smtp1.a2000.nl with esmtp (Exim 2.02 #4)
id 112SYe-0002lN-00
for Z(dot)Nijmeyers(at)cable(dot)a2000(dot)nl; Fri, 9 Jul 1999 06:46:44 +0200
Received: from hub.org (hub.org [209.167.229.1])
by hub.org (8.9.3/8.9.3) with ESMTP id AAA39425;
Fri, 9 Jul 1999 00:40:25 -0400 (EDT)
(envelope-from owner-pgsql-hackers(at)hub(dot)org)

This morning I sent a polite note to postmaster(at)cable(dot)a2000(dot)nl, warning
them that they've got a problem with mail looping. It promptly bounced
back with

postmaster(at)cable(dot)a2000(dot)nl:
SMTP error from remote mailer after RCPT TO:
<postmaster(at)cable(dot)a2000(dot)nl>:
host hardy-1.a2000.nl [192.168.17.13]:
550 Invalid recipient <postmaster(at)cable(dot)a2000(dot)nl>

(Sending to postmaster(at)a2000(dot)nl instead probably won't help, since it
MX's to the same machines.)

I conclude that a2000.nl is run by a bunch of idiots who can't read
RFCs, let alone operate a mail server competently. I expect that
we will continue to get blessed with regurgitated messages until Marc
pulls any a2000.nl addresses from the mailing lists :-(

regards, tom lane