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

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Hi,

i got unsubscribed a second time:
  Date: Mon, 11 Oct 2021 07:45:53 +0000 (UTC)
  From: debian-user-request@lists.debian.org
  Message-Id: <20211011074553.C8C2820462@bendel.debian.org>

My proposal is to disable the auto unsubscription feature, which is an
unusual behavior of a mailing list. It is just too vulnerable to external
interference.


Dan Ritter wrote:
> The cannon appears to be manually aimed.

I get this impression too. My first unsubscription happened immediately
after i expressed my disappointment about not being targeted.
Further i doubt that any normal mail server can be configured to produce
fake bounces.
I think that we see genuine malware at work.


> Subscribe to debian-user with an alias which goes where you want
> it, and continue posting as scdbackup@gmx.net.
> [...]
> I hope that helps until the listmasters figure out how to avoid
> accepting conunterfeit evidence.

I still riddle whether the test mails have been discontinued after only
one day of use, or whether my test mail fell into the same pit at GMX as
did the (actually unsuspicious) mail
  From: Pierre-Elliott =?utf-8?Q?B=C3=A9cue?= <peb@debian.org>>
  Subject: Re: Then it happened to me...
  Date: Sun, 10 Oct 2021 21:05:44 +0200
  Message-ID: <87lf303dit.fsf@jaatynyt>


Eduardo M KALINOWSKI wrote:
> 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:
> [...] header syntax (malformed address: >\n may not follow
> Pierre-Elliott =?utf-8?Q?B=C3=A9cue?= <peb@debian.org> [...]

So Pierre-Elliot Bécue wrote an accent aigu in his name which the mail
server disliked.
I remember to have had own mails rejected by GMX when i wrote non-ASCII
characters in the Subject: header. But i did not bother to encode them
as quoted printable.

RFC 2047 permits such a From line:
  "5. Use of encoded-words in message headers
   An 'encoded-word' may appear in a message header or body part header
   according to the following rules:
   [...]
   (3) As a replacement for a 'word' entity within a 'phrase', for example,
   one that precedes an address in a From, To, or Cc header. [...]
  "
In "8. Examples" there is no "utf-8" to see, but the examples with
  =?ISO-8859-1?Q? ... ?=
look similar enough.

We cannot deny a list user the right to write his own name into "From:".
And hardly i can influence GMX to accept Q-encoded UTF-8.

Whatever, this cannot be the same reason why GMX would bounce a test mail
from listmaster@lists.debian.org as quited by piorunz in
  https://lists.debian.org/msgid-search/9492fecf-89a8-3932-7740-f437beac5497@gmx.com
  Date: Fri, 8 Oct 2021 19:41:31 +0100

So i assume that such a mail was not sent to me. Pity. It seemed to be a
good idea to reduce the false unsubscriptions.


Have a nice day :)

Thomas

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Thread

A real bounce between GMX and bendel.debian.org "Thomas Schmitt" <scdbackup@gmx.net> - 2021-10-10 22:20 +0200
  Re: A real bounce between GMX and bendel.debian.org "Thomas Schmitt" <scdbackup@gmx.net> - 2021-10-10 22:50 +0200
  Re: A real bounce between GMX and bendel.debian.org Eduardo M KALINOWSKI <eduardo@kalinowski.com.br> - 2021-10-11 03:10 +0200
    Re: A real bounce between GMX and bendel.debian.org "Thomas Schmitt" <scdbackup@gmx.net> - 2021-10-11 10:20 +0200
    Re: A real bounce between GMX and bendel.debian.org Brian <ad44@cityscape.co.uk> - 2021-10-11 14:00 +0200
    Re: A real bounce between GMX and bendel.debian.org Cord Beermann <cord@debian.org> - 2021-10-13 11:20 +0200
  Re: A real bounce between GMX and bendel.debian.org Joe <joe@jretrading.com> - 2021-10-11 09:50 +0200
  Re: A real bounce between GMX and bendel.debian.org Andrei POPESCU <andreimpopescu@gmail.com> - 2021-10-11 12:50 +0200

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