Re: NANOG Featured on "Packet Pushers" Podcast Network! 🦃 Happy Thanksgiving! + More

[Niels Bakker via NANOG <nanog () lists nanog org>]

* Mel Beckman [Fri 28 Nov 2025, 22:13 CET]:
> But the news () nanog org header only appears because it is a CC.  This 
> may not be consistent and it’s certainly not obvious or convenient 
> to filter on.

No. The list software has to replace the original sender's address in 
the From: header with the list address because DKIM/SPF/DMARC. It then 
places the original sender's address not in the Reply-To: header but 
in the Cc: header because it has to go somewhere to stay preserved, 
I guess. So the news@ address (not header) doesn't appear in Cc: by 
accident, it appears there because it's the original email's sender.


        -- Niels.
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