Hello. Our company uses roundcube as default webmail interface (webmail.au.syrahost.com). Customer's mailboxes stored on over 200 cPanels servers and on mail cluster. When user logged in to webmail, server check MX record for domain and RC create new IMAP session to this server and user get access to mailbox.
Now we want add to RC password plugin. What driver we can use if RC server hasn't installed dovecot or other imap server?