It appears that Claus Assmann <ietf-smtp(_at_)ietf(_dot_)org> said:
On Wed, Jun 16, 2021, John Levine wrote:
It was locally injected with "sendmail
-fuser1(_at_)xn--5nq21jyu9d1ta(_dot_)xn--5nqx41au4nqohsp3axcg(_dot_)xn--fiqs8s
atest(_at_)xn--fct(_dot_)xn--5nqx41au4nqohsp3axcg(_dot_)xn--fiqs8s"
Do you still have that "shim" (mentioned in a usenet posting)?
Good thinking, but I got rid of the shim, typed a test message with the Mail
command, same result:
=====
Return-Path:
<johnl(_at_)xn--5nq21jyu9d1ta(_dot_)xn--5nqx41au4nqohsp3axcg(_dot_)xn--fiqs8s>
Received: from xn--5nq21jyu9d1ta.xn--5nqx41au4nqohsp3axcg.xn--fiqs8s
([IPV6:2606:4300:0:4::1003])
by mail1.iecc.com ([IPV6:2001:470:1f07:1126:33:5370:616d:6d31])
with UTF8SMTPS via TCP6 (port 22912/25) id 678041815
tls TLS1_3_ECDHE_RSA_AES_256_GCM_AEAD; 16 Jun 2021 21:12:44 -0000
Received: from xn--5nq21jyu9d1ta.xn--5nqx41au4nqohsp3axcg.xn--fiqs8s (localhost
[127.0.0.1])
by xn--5nq21jyu9d1ta.xn--5nqx41au4nqohsp3axcg.xn--fiqs8s (8.17.0.2/8.16.1)
with UTF8SMTPS id 15GLChW5086678
(version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO)
for <johnl(_at_)iecc(_dot_)com>; Wed, 16 Jun 2021 21:12:43 GMT
(envelope-from
johnl(_at_)xn--5nq21jyu9d1ta(_dot_)xn--5nqx41au4nqohsp3axcg(_dot_)xn--fiqs8s)
Received: (from johnl@localhost)
by xn--5nq21jyu9d1ta.xn--5nqx41au4nqohsp3axcg.xn--fiqs8s
(8.17.0.2/8.16.1/Submit) id 15GLChpK086677
for johnl(_at_)iecc(_dot_)com; Wed, 16 Jun 2021 21:12:43 GMT
(envelope-from johnl)
Date: Wed, 16 Jun 2021 21:12:43 GMT
From: John L
<johnl(_at_)xn--5nq21jyu9d1ta(_dot_)xn--5nqx41au4nqohsp3axcg(_dot_)xn--fiqs8s>
Message-Id:
<202106162112(_dot_)15GLChpK086677(_at_)xn--5nq21jyu9d1ta(_dot_)xn--5nqx41au4nqohsp3axcg(_dot_)xn--fiqs8s>
To: johnl(_at_)iecc(_dot_)com
Subject: a boring little message
bye
=====
Perhaps the A-labels in the domain name are confusing it?
In any event, I think you will find that expecting the users to tell
you when a message needs EAI handling rather than figuring it out when
it does the submission cleanup will cause endless pain. Neither
postfix nor exim have anything like the -U flag.
R's,
John
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