[gauravrishi]

I have follow all the step given under this Virtual Users And Domains With Postfix, Courier, MySQL And SquirrelMail (Ubuntu 12.10) and was sucessfully done all step but i am getting this error while restarting postfix
/usr/sbin/postconf: warning: /etc/postfix/main.cf: unused parameter: virtual_maildir_limit_message="The user you are trying to reach is over quota."
/usr/sbin/postconf: warning: /etc/postfix/main.cf: unused parameter: virtual_maildir_extended=yes
/usr/sbin/postconf: warning: /etc/postfix/main.cf: unused parameter: virtual_mailbox_limit_override=yes
/usr/sbin/postconf: warning: /etc/postfix/main.cf: unused parameter: virtual_overquota_bounce=yes
/usr/sbin/postconf: warning: /etc/postfix/main.cf: unused parameter: virtual_maildir_limit_message="The user you are trying to reach is over quota."
/usr/sbin/postconf: warning: /etc/postfix/main.cf: unused parameter: virtual_maildir_extended=yes


and also not able to login into webmail getting ERROR:
ERROR: Connection dropped by IMAP server.
. I have checked that all service are running fine but there is no maildir under /home/vmail/

Kindly help me in this