Before debian squeeze to wheezy upgrade postfix presents some warn menssages. looks like deprecated things i don´t no anyone can confirm it. make upgrade of all packages and dist-upgrade before run upgrade script and select for reconfigure everyting latest with ispconfig installer. squeeze Package: postfix Version: 2.7.1-1+squeeze1 :~# postconf -m btree cidr environ hash internal mysql nis pcre proxy regexp sdbm static tcp unix wheezy Package: postfix Version: 2.9.6-2 :~# postconf -m btree cidr environ fail hash internal memcache mysql nis proxy regexp sdbm sqlite static tcp texthash unix i don´t no if the fresh install have the same probem. -------------------------------------------------- /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_maildir_extended=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/master.cf: unused parameter: smtpd_bind_address=127.0.0.1 . ok [....] Starting Postfix Mail Transport Agent: postfixpostconf: warning: /etc/postfix/main.cf: unused parameter: virtual_maildir_limit_message="The user you are trying to reach is over quota." postconf: warning: /etc/postfix/main.cf: unused parameter: virtual_mailbox_limit_override=yes postconf: warning: /etc/postfix/main.cf: unused parameter: virtual_maildir_extended=yes postconf: warning: /etc/postfix/main.cf: unused parameter: virtual_overquota_bounce=yes postconf: warning: /etc/postfix/main.cf: unused parameter: virtual_create_maildirsize=yes postconf: warning: /etc/postfix/master.cf: unused parameter: smtpd_bind_address=127.0.0.1 postconf: warning: /etc/postfix/main.cf: unused parameter: virtual_maildir_limit_message="The user you are trying to reach is over quota." postconf: warning: /etc/postfix/main.cf: unused parameter: virtual_mailbox_limit_override=yes postconf: warning: /etc/postfix/main.cf: unused parameter: virtual_maildir_extended=yes postconf: warning: /etc/postfix/main.cf: unused parameter: virtual_overquota_bounce=yes postconf: warning: /etc/postfix/main.cf: unused parameter: virtual_create_maildirsize=yes postconf: warning: /etc/postfix/master.cf: unused parameter: smtpd_bind_address=127.0.0.1 ------------------------------------------------------------