On Fri, Nov 03, 2023 at 12:18:05PM -0400, Chris Siebenmann wrote:
> > The modification to List-Id also leaves me wondering about
> > "Sender". I was previously under the impression mailing lists
> > used/modified this, but apparently not.
> My impression is that Sender is relatively obscure now. It was
> originally mostly used to identify a human who had sent the message
> 'on behalf of' the From: address. In practice various mail clients
> and MTAs would add a Sender: if they could identify that the
> submitter of the message wasn't the From:. Most mailing lists didn't
> set a Sender: because they weren't acting this way (or didn't
> consider themselves to be).
I believe exim still adds a Sender header when a message is submitted
via stdin with the -f option (which can only happen when you're one
of the "trusted" users).
I should check what hapens when you do this with msmtp, the program
I task with the submission role.
--
Ian
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