offlineimap(1) on Linux
The text 4f6d724db903, as Debian 7 (Wheezy) shipped it.
Powerful IMAP/Maildir synchronization and reader support
Flags it lists
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-1 -
-P -
-a -
-c -
-d -
-f -
-k -
-l -
-o -
-q -
-u