On 2026-08-23 18:39:55 +0200, Alejandro Colomar via Mutt-dev wrote:
> > Is there any standards-based support for it?
>
> There's no support nor restriction from standards.
RFC 2076:
In e-mail: reference to other References: RFC 822: 4.6.3
related messages, in Usenet News: RFC 1036: 2.1.5.
reference to replied-to-articles.
RFC 822:
4.6.3. REFERENCES
The contents of this field identify other correspondence
which this message references. Note that if message identif-
iers are used, they must use the msg-id specification format.
but this has been dropped later and is not present in RFC 5322, which
just describes it in the reply case.
--
Vincent Lefèvre <[email protected]> - Web: <https://www.vinc17.net/>
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Work: CR INRIA - computer arithmetic / Pascaline project (LIP, ENS-Lyon)