7 Jul
2019
7 Jul
'19
12:10 a.m.
- andrew bernard:
first le me ask how does Hyperkitty thread messages? Is it based on the message-id in the header, guaranteed unique, or on the subject header?
See https://tools.ietf.org/html/rfc5322#section-3.6.4 for an explanation of message threading. It is ID-based, the subject header does not factor into it (no matter what Microsoft thinks of this).
-Ralph