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Re: Non-delivery reports from postmaster@ewetel.de



Am Fri, Dec 01, 2023 at 11:02:47PM +0000 schrieb Andy Smith:
> Hi,
> 
> Is anyone else receiving non-delivery report emails from
> postmaster@ewetel.de for every email they post to debian-user? They
> look like this:
> 
>     From: postmaster@ewetel.de
>     To: andy@strugglers.net
>     Subject: E-Mail Abweisungsbenachrichtigung / email bounce notification
> 
> It goes on to state that the message wasn't delivered because the
> recipient's mailbox is full.
> 
> I've received one for every email I've sent to debian-user over the
> last 4 days. Anyone else? If so, can you let
> listmaster@lists.debian.org know?

Hello Andy,
I have received one mail like that when posting to the l10 list.
The mail appeared in the list in spite of that message. With further
mails everything has been back to normal.
> 
> Naturally, ewetel.de should be rejecting these messages inside the
> SMTP connection if they can't be delivered to their user.
> 
> Failing that, they should be sending NDRs to the envelope sender,
> which is the Debian mailing list software, which would then take
> care of unsubscribing the undeliverable address.
> 
> It seems to have done the very broken thing of sending an NDR to the
> from address. If that assessment is correct, Debian listmasters will
> need to disable delivery to this subscriber manually.
> 
> But, possibly whatever problem it was has fixed itself by now. If
> ewetel were ALSO sending an NDR to the envelope sender then the
> subscriber would have been disabled eventually.

Kind regards,
Christoph

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