On Thu, Jun 11, 2015 at 01:25:44PM -0400, Xu Wang wrote: > > I would really like to know if a message has been replied to (e.g. > using a certain message id). It seems that all I need to do is check > for the "replied" tag. But often this tag is not there, even when > there has been a reply (I have confirmed this through the thread > display and checking the message that replied to the message to make > sure it indeed has header "replied-to:<MSG-ID>"). You do not give enough details, but I would guess you are probably reading and replying emails from real maildirs in mutt-kz. The synchronising of notmuch tags and maildir flags happen correctly only when you read and reply from virtual folders. Of course they are synchronised again when `notmuch new' is run the next time. But until such time, the tags and flags will not be in sync, if you are using real folders instead of virtual folders. Hope this helps, -- Suvayu Open source is the future. It sets us free.