I just set up a Postfix+Dovecot Mail System. This system uses only virtual users. I set the mailboxes up in /var/vmail/DOMAIN/USER in the Maildir format. Now I connected (successfully :D) with my IMAP Client to the thing and created a folder and moved an existing mail from INBOX to the folder. And now I can't find this mail on the file-system. It is gone from cur but there is no other folder created in /var/vmail/DOMAIN/USER.
Where do the folders go?
/var/vmail/DOMAIN/USERvia IMAP. Where is thiscuryou mention located in the file system? Did you perhaps move it to a local folder on your client? You do know that subfolders start with a dot in Maildir format (so you needls -aoption)?