having trouble using offlineimap to copy folders to a local store for spamassasin to use. Says "no folder to sync (folderfilter issue?)"

Thinking I simply did not know the proper folder name, did telnet to dovecot server for list of folders, see this,(snippet):

. . .

• LIST (\HasNoChildren \UnMarked) "." Cabinet.Missed-SPAM
• LIST (\HasNoChildren) "." Cabinet.Missed-HAM
• LIST (\HasNoChildren \UnMarked) "." Cabinet.Marked-SPAM . . .

What is the significance of not one being not "UnMarked"?

joe a.