I used ispcp before. Be glad to have ispconfig now. So here is my Question: I have used the Howto for Debian7 and dovecot. If i go to my systemsettings in ispconfig, i can choose between dovecot and courier. By default, dovecot was choosed. But for keep migration from ispcp simple, i would like to use courier to migrate my mails. Can i only switch dovecot to courier, or have i to do some additional work to make this switch work? Is there a need to create other Directorys? In best case, i would like to migrate all Mail-Username and passwords to ispconfig... is this possible? I also would use dovecot, but I'm affraid, that migrating is not such easylike 1-2-3.