I have used the instructions from the following URL: http://flurdy.com/docs/postfix/ to create an mail server on a Xen node which runs Debian Sarge, with additional changes to use MySQL 5, after i have completed the howto, and try to logon, the following errors apears, who can help me out.

Jan 9 12:37:36 xen01 postfix/master[2995]: warning: /usr/lib/postfix/trivial-rewrite: bad command startup -- throttling
Jan 9 12:37:37 xen01 imaplogin: LOGIN FAILED, ip=[::ffff:127.0.0.1]
Jan 9 12:37:37 xen01 imaplogin: LOGIN: DEBUG: ip=[::ffff:127.0.0.1], command=LOGOUT
Jan 9 12:37:37 xen01 imaplogin: LOGOUT, ip=[::ffff:127.0.0.1]
Jan 9 12:38:36 xen01 postfix/trivial-rewrite[3153]: warning: connect to mysql server 127.0.0.1: Can't connect to MySQL server on '127.0.0.1' (111)
Jan 9 12:38:36 xen01 postfix/trivial-rewrite[3153]: fatal: mysql:/etc/postfix/mysql_alias.cf(0,100): table lookup problem
Jan 9 12:38:37 xen01 postfix/smtpd[3094]: warning: premature end-of-input on private/rewrite socket while reading input attribute name
Jan 9 12:38:37 xen01 postfix/smtpd[3094]: warning: problem talking to service rewrite: Success
Jan 9 12:38:37 xen01 postfix/master[2995]: warning: process /usr/lib/postfix/trivial-rewrite pid 3153 exit status 1
Jan 9 12:38:37 xen01 postfix/master[2995]: warning: /usr/lib/postfix/trivial-rewrite: bad command startup -- throttling

Regards,

Arjan