When using the mailutil utility to copy mail/move from a folder to another, some MUA-specific flags are lost, like the Junk or label flags that Mozilla uses.
Mailutil tries to copy keywords, but (depending upon the mail store) some keywords may not copy in the IMAP server. Newer versions of UW imapd do a *much* better job at preserving keywords on copy, but there remain some limitations.
-- Mark --
http://staff.washington.edu/mrc Science does not emerge from voting, party politics, or public debate. Si vis pacem, para bellum.
