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Re: A real bounce between GMX and bendel.debian.org

On 10/10/2021 17:18, Thomas Schmitt wrote:

Hi,

although i seem not to be worth to be targeted by our bounce assassin,
my mail provider and bendel.debian.org are at odds enough to produce
a real bounce message, which then causes a warning mail from
listmaster@lists.debian.org .

I am trying to make sense out of the given bounce report

   https://lists.debian.org/bounces/79gUBBa56gHKY3wtHzNKdg

It is hard to distinguish the hearsay by bendel.debian.org from the
message parts which come from my provider's server mx00.emig.gmx.net.
Especially i wonder from where bendel takes the association to my
mail address (and which mentionings show its conclusions about my
address).

Whatever, the reason for the bounce is that GMX accuses debian-user
of not meeting its requirements
   https://www.gmx.net/mail/senderguidelines
All points there look like they are not volatile problems but rather
persistent ones. But listmaster@lists.debian.org wrote i had

  1 bounce out of 68 mails in one day (1%, kick-score is 80%)

So why did the other 67 succeed ?


That seems unrelated to the OVH bounces.
My mailserver bounced the same email (and I got a warning like that). Since I run my own mailserver, and can look at the logs and see exactly why it has been rejected, and here's what I got:
2021-10-10 16:07:37 1mZeAb-0005Mc-Hn H=bendel.debian.org [2001:41b8:202:deb:216:36ff:fe40:4002] X=TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM:256 CV=no F=<bounce-debian-user=eduardo=kalinowski.com.br@lists.debian.org> rejected after DATA: header syntax (malformed address: >\n may not follow Pierre-Elliott =?utf-8?Q?B=C3=A9cue?= <peb@debian.org>: failing address in "From:" header is: Pierre-Elliott =?utf-8?Q?B=C3=A9cue?= <peb@debian.org>>): malformed address: >\n may not follow Pierre-Elliott =?utf-8?Q?B=C3=A9cue?= <peb@debian.org>: failing address in "From:" header is: Pierre-Elliott =?utf-8?Q?B=C3=A9cue?= <peb@debian.org>> 

And this is From header:

From: Pierre-Elliott =?utf-8?Q?B=C3=A9cue?= <peb@debian.org>>

(There does seem to be an extra > in there.)
In this case, my server bounced a mail, and so the listserver is correct in sending me that notification. And since it was just one email, I did not get unsubscribed.
However, perhaps the listserver should have not accepted that email with the (possibly) invalid From header in the first place.
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