Grant skrev den 2013-04-01 12:10:
roundcube seems to require mysql. What is it used for if mail is kept in the .maildir?
no no, roundcube does not need mysql, it does need a backend for user prefs, not for mailstorage
backend can be any storage as sql/sqlite/pdo but only for user prefs and if wanted for address books, but it all depends on what admin wants, its not user selected