Plugin for backup of mail box

[umashanker_p28]

Hai
i am having postfix+dovecot+roundcube+postfixadmin setup in our mail server.
I want to give the backup facility to users so that they can backup their mailboxes. And later they can restore whenever requires.

Is there any such facility or plugin available in roundcube 0.5

[SKaero]

Check out the Zip Download plugin http://www.tehinterweb.co.uk/roundcube/#pizipdownload and the Import Messages plugin http://www.tehinterweb.co.uk/roundcube/#piimportmessages