/usr/bin/mddiff
/usr/bin/smd-check-conf
/usr/bin/smd-client
/usr/bin/smd-loop
/usr/bin/smd-pull
/usr/bin/smd-push
/usr/bin/smd-restricted-shell
/usr/bin/smd-server
/usr/bin/smd-translate
/usr/bin/smd-uniform-names
You may install this package on Debian with
apt-get
install syncmaildir