offlineimap(1) on Linux
The text 9b617f5cc9aa, as Debian 4.0 (Etch) shipped it.
Powerful IMAP/Maildir synchronization and reader support
Flags it lists
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--help -
-1 -
-P -
-a -
-c -
-d -
-h -
-l -
-o -
-u