Postfix main.cf

Failed to start 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_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_create_maildirsize=yes
/usr/sbin/postconf: warning: /etc/postfix/main.cf: unused parameter: virtual_mailbox_extended=yes
Where are these lines in ehcp, to no longer modify main.cf ?
Tnx.