Heya,
On Thu Oct 13, 2022 at 5:20 PM BST, Wojtek Kosior via wrote:
> It took me a couple of minutes to understand what you're talking about.
> Indeed, instead of copy-pasting the <help-guix@gnu.org> address I clicked
> "Reply" on some random email from Guix mailing list and changed the subject.
> For years I've been certain that messages are categorized into threads by
> their subject. Now, as you wrote this, I assume there must be some thread
> meta-data that is invisibly sent by our user agents when we use "Reply" or
> "Reply all".
Yes, the In-Reply-To: header :)
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