[Dovecot] how to configure dovecot, Error

[Roland Schmid]

Hi,

we are using Squirrelmail, imapd is dovecot. OS is Debian Sarge.
When I want to login with Squirrelmail the connection to the imap-server
is aborted. /var/log/mail.log gives the these log-entries:
Oct 25 14:39:36 webserver dovecot: imap(rs.messegrafik-schreiber.de):
mbox: Can't create root IMAP folder
/home/rs.messegrafik-schreiber.de/mail: Permission denied
Oct 25 14:39:36 webserver dovecot: imap(rs.messegrafik-schreiber.de):
MAIL environment missing and autodetection failed (home
/home/rs.messegrafik-schreiber.de)
Oct 25 14:39:36 webserver dovecot: imap-login: Login:
user=<rs.messegrafik-schreiber.de>, method=PLAIN, rip=127.0.0.1,
lip=127.0.0.1, secured
Oct 25 14:39:36 webserver dovecot: child 31339 (imap) returned error 89

Need help, thanks.

Roland