On Wed, 2009-01-07 at 12:16 +0000, Patrick O'Callaghan wrote: > Can you give a specific example where the MUA uses the References > header to display messages (i.e. derives some information from it that > is not present in the In-Reply-To header, other than simply copying it > to further replies)? You can test for that yourself with any collection of messages belonging to a thread, remove the messages linked directly together by the in-reply-to headers. (Copy a thread to a test folder, remove the every second generation of messages.) If the mailer manages to keep the related messages grouped together as a related thread, even without messages being linked as replies to another message, then it's using the reference headers. -- [tim@localhost ~]$ uname -r 2.6.27.9-73.fc9.i686 Don't send private replies to my address, the mailbox is ignored. I read messages from the public lists. -- fedora-list mailing list fedora-list@xxxxxxxxxx To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines