My mailserver has been working perfectly until today, and i can´t figure out what is wrong.
Students can log into webmail, but are unable to send mail.
The squirrelmail configtest reports everything to be OK, allthough the smtp-check takes about 90 seconds.

mail log:
Feb 16 14:08:38 Leonardo postfix/smtpd[2423]: fatal: unsupported dictionary type: http
Feb 16 14:08:39 Leonardo postfix/master[2015]: warning: process /usr/libexec/postfix/smtpd pid 2423 exit status 1
Feb 16 14:08:39 Leonardo postfix/master[2015]: warning: /usr/libexec/postfix/smtpd: bad command startup — throttling

postconf -n:
command_directory = /usr/sbin
config_directory = /etc/postfix
content_filter = smtp-amavis:[127.0.0.1]:10024
daemon_directory = /usr/libexec/postfix
debug_peer_level = 2
enable_server_options = yes
html_directory = no
inet_interfaces = all
mail_owner = postfix
mailbox_size_limit = 0
mailbox_transport = cyrus
mailq_path = /usr/bin/mailq
manpage_directory = /usr/share/man
maps_rbl_domains =
mydestination = $myhostname,localhost.$mydomain,stud.c-k.no
mydomain = stud.c-k.no
mydomain_fallback = localhost
myhostname = stud.c-k.no
mynetworks_style = host
newaliases_path = /usr/bin/newaliases
queue_directory = /private/var/spool/postfix
readme_directory = /usr/share/doc/postfix
sample_directory = /usr/share/doc/postfix/examples
sendmail_path = /usr/sbin/sendmail
setgid_group = postdrop
smtpd_client_restrictions = permit_mynetworks reject_rbl_client http://relays.ordb.org reject_rbl_client http://bl.spamcop.net permit
smtpd_pw_server_security_options = login,cram-md5,plain
smtpd_recipient_restrictions = permit_sasl_authenticated,permit_mynetworks,reject_unauth_destination,permit
smtpd_sasl_auth_enable = yes
smtpd_tls_key_file =
smtpd_use_pw_server = yes
unknown_local_recipient_reject_code = 550

Help is greatly appreciated

/ståle