Baptiste Daroussin <b...@freebsd.org> wrote:

> No it was not sent to the whole list but only to the people whom mail server
> have bounced an incoming mail.

Apologies. I should have checked the header more closely. I've never had one
of these before, and I received one the same time as I saw the posting from
Matthias about the same thing.

> It is not a configuration, this can happen in 2 cases:
> - a change in the on your email provider which start bouncing emails (hence 
> the
>   fact we don't stop those emails)
> - but most case it is due to the antispam on your provider side, when a spam
>   managed to passthrough our (freebsd) antispam infrastructure.

I run my own mailservers - The only antispam measure I use is the spamhaus SBL.

I just checked the log - my end refused it because of:

2023 Aug  2 17:26:25 <mail.crit> donotpassgo sm-mta[60105]: 372GQP6W060096: 
SYSERR(root): Too many hops 27 (25 max): from 
<freebsd-net+bounces-3720-freebsd-lists=dyslexicfi
sh....@freebsd.org> via mx2.freebsd.org, to <freebsd-li...@dyslexicfish.net>

(The same for 3720 and 3719)

> To receive the email that has bounced:
>
> mail freebsd-net+get-3...@freebsd.org (not that there is a good chance that it
> bounces again if this was not a configuration change that has been fixed.

Tried that, and it bounced again, same message.

> and raw version: 
> https://lists.freebsd.org/archives/freebsd-net/2023-August/003718.txt

If you look at that, it appears that the message was sent out from the list
to a subscriber, where it looped a few times, and then got injected back into
the freelist - this is presumably why a few people got the bounce.

Cheers, Jamie

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