When a replied messages is moved to an IMAP mailbox its (r)replied flag is lost and it acquires a (N)ew flag in the mbox.
Here are my settings: mutt-1.3.28 set folder=imap://10.0.2.1/INBOX set spoolfile=imap://10.0.2.1/INBOX set mbox=+In record=+Out The strange thing is that when (C)opying a (r)eplied message to an IMAP box the flag is kept, so obviously it's not an IMAP issue. -- HIPPOLYTE: Approuvez le respect qui me ferme la bouche ; Et sans vouloir vous-même augmenter vos ennuis, Examinez ma vie, et songez qui je suis. (Phèdre, J-B Racine, acte 4, scène 2)