Hi Oswald, thanks for answering and your comments.
> the first client-side message has no U= infix, which suggests that it's not > from mbsync - or that something messed up the file name afterwards, which > might explain ... something ... i guess. but both files are apparently from > the same process. very mysterious, indeed. Ok, I think I slowly get an idea what is going on. Let me start with (parts of) my configuration, only the relevant account (I sync 4 accounts): *** Expunge None Create Both Remove Both MaildirStore preining-local Path ~/Maildir/Preining/ SubFolders Verbatim Trash Trash IMAPStore preining-remote Host preining.info User norbert PassCmd "...." SSLType IMAPS Channel preining-INBOX Far :preining-remote:INBOX # rename INBOX to preining since I sync several accounts, and # then all would show up in mutt sidebar as INBOX Near :preining-local:preining SyncState * Expunge Both Channel preining-REST Far :preining-remote: Near :preining-local: Pattern * Pattern !INBOX Pattern !preining SyncState * Expunge Both Group inboxes Channels logic-INBOX *************** It seems the problem is that: * all is in sync * I move a message from INBOX to Trash via a different client (mobile) * then I sync only INBOX using mbsync * mbsync moves the disappearing message to trash which is defined as "Trash" which is linked to the Trash on the imap server * at some point I run mbsync on the Trash folder and get the copy that was moved by Android into it. I can see this because the mssage without the U=NNNNNNNN part in the filename, like 1627618004.158330_1.bulldog:2,T appears only after I have deleted a message on the server, and then syncronize the INBOX only. Now my questions are: * Is my above idea correct? And if yes, ... * should I simply remove the "Trash Trash" configuration? (what I want is that emails that disappear are simply removed, no need to keep them somewhere as backup) * Does it have any connection to the Expunge setting? Thanks Norbert -- PREINING Norbert https://www.preining.info Fujitsu Research + IFMGA Guide + TU Wien + TeX Live + Debian Dev GPG: 0x860CDC13 fp: F7D8 A928 26E3 16A1 9FA0 ACF0 6CAC A448 860C DC13 _______________________________________________ isync-devel mailing list isync-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/isync-devel