rmail threading

[Richard Stallman]

[[[ To any NSA and FBI agents reading my email: please consider    ]]]
[[[ whether defending the US Constitution against all enemies,     ]]]
[[[ foreign or domestic, requires you to follow Snowden's example. ]]]

  > Is the below good enough?  If it is, I can easily code a similar
  > "previous-by-thread" command.

It is a start, but what is really needed is a summary command
to generate a summary containing the messages of a thread established
by message-IDs.

In fact, I never use rmail-next-same-subject; I don't even remember
it is there.  I always use rmail-summary-by-topic, after which
I can see all the messages of the thread-by-subject.

-- 
Dr Richard Stallman (https://stallman.org)
Chief GNUisance of the GNU Project (https://gnu.org)
Founder, Free Software Foundation (https://fsf.org)
Internet Hall-of-Famer (https://internethalloffame.org)