On 03/12/2016 01:44 PM, Richard Damon wrote: > The normal definition of the 'Thread' is a chain of message linked by > In-Reply-To: and References: headers to Reference-Id: headers. > > Every email message has a unique Reference-Id: header to identify it.
Richard's answer is generally good, but the name of the header is Message-Id:, not Reference-Id: The definitive reference on threading is <https://www.jwz.org/doc/threading.html> Some mail clients (mostly Microsoft ones I think) put a Thread-Index: header in messages, but for various reasons this is not useful for determining threading on an email list with posts from many sources. -- Mark Sapiro <m...@msapiro.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan _______________________________________________ Mailman-Developers mailing list Mailman-Developers@python.org https://mail.python.org/mailman/listinfo/mailman-developers Mailman FAQ: http://wiki.list.org/x/AgA3 Searchable Archives: http://www.mail-archive.com/mailman-developers%40python.org/ Unsubscribe: https://mail.python.org/mailman/options/mailman-developers/archive%40jab.org Security Policy: http://wiki.list.org/x/QIA9
