On Tue, Nov 01, 2022 at 12:18:43AM +0100, Wolfgang Pfeiffer wrote:
> Kevin,
> Thanks for your quick response!
> 
> TL;DR:
> if you're suggesting that the
> 
> "From: Wolfgang Pfeiffer <r...@gmx.net>"
> 
> header in my future emails to this Fedora list should be replaced with
> something along the line of this:
> 
> "From: Wolfgang Pfeiffer via <users@lists.fedoraproject.org"
> 
> my answer is: yes - I'm fine with that.

There's no way for me to force that to happen in the list software. 
It will automatically do that if it detects you are using DMARC with a
policy of reject or quarantine, and not if it doesn't detect that. ;(  

> On Mon, Oct 31, 2022 at 10:48:30AM -0700, Kevin Fenzi wrote:
> > On Sun, Oct 30, 2022 at 08:57:28PM +0100, Wolfgang Pfeiffer wrote:
> > ...snip...
> > > 
> > > By now the list management - provided there is one - should know about
> > > the problem. If they can't fix it I will by sending those DSNs to
> > > /dev/null - or I just unsubscribe.
> > > 
> > > Thanks a lot for your time - goes out equally to everyone having
> > > contributed to this thread.
> > 
> > Just FYI, I looked into this and:
> > 
> > So, from what I can see, I think this is whats happening:
> > 
> > 1. You send an email to the users list.
> > [ ... ]
> 
> > I can try unsubscribing the email I _think_ is being forwarded to
> > the outlook.com user.
> 
> Yes: one could try this: But the solution in the tl;dr from above might
> end the troubles in one fell swoop anyways - so no further action
> probably needed then; Provided I understood correctly, so far ..

I have already tried this, so I guess let me know when/if you get the
bounce. ;) (ie, I have unsubscribed the user who I think is forwarding
to outlook.com).

> > The list has mitigation for a similar case (DMARC).
> > It applies this to messages From: a domain publishing a DMARC policy of 
> > reject or quarantine
> > So, if you could add such a policy/support to gmx.com it could use this
> > workaround (basically it replaces your sender address with the list
> > address).
> 
> Again: Please see my tl;dr from above: is this what your suggesting in
> this last part? If yes: as I said above: I'm fine with the address
> replacement for this list and for my r...@gmx.net address ...

I can't force the list to do this. Your domain would need to enable
DMARC and set reject or quarantine for the list software to decide to
set this for you. ;( This needs a DNS entry added to your domain. 
See https://dmarc.org/overview/

kevin

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