16 Dec
2022
16 Dec
'22
12:49 p.m.
On 12/16/22 10:04 AM, ic wrote:
In my experience, threading is done by clients looking for the In-Reply-To: header, not subject. Subject is a heuristic fallback, in case In-Reply-To is absent.
I believe the References: header is what most clients use as well? -- Brielle Bruns The Summit Open Source Development Group http://www.sosdg.org / http://www.ahbl.org