Converting existing users mail format from mbox to maildir?
we are upgrading our mail server sendmail/uwimap to new hardware and postfix/dovecot.
my question is how do we convert users mail format from mbox to maildir? the reason we want to do that is because some users mail is very slow and from searching online we discovered mail format could be one factor when users mbox is large and that maildir format would fix this issue.
thank you for you help