smd-pull(1) on Linux
The text 4c0e87e61f0e, as Debian 7 (Wheezy) shipped it.
syncs the local mail dir letting the remote one untouched
Flags it lists
-
--dry-run -
--no-delete -
--show-tags -
--template-only -
--verbose -
-d -
-n -
-s -
-t -
-v