Postfix always tries to deliver emails localy

[charms]

Hi

I have changed from sendmail to postfix and have nearly made it to have a somehow working config. I'm at the point that local mail delivery is working fine. But when i want to send an email as example from my mailserver (where postfix is running on) to an email address that is located on another mailserver (devnull@hispeed.ch), the email bounces back and i get an error that the user couldn't be found localy. Can somebody help me with this issue? Further down you'll find the log entries and my postfix config:

command:
--------------------------------------------------
root@overload:/data/conf/postfix # whoami
root
root@overload:/data/conf/postfix # mail devnull@hispeed.ch
Subject: testmail
test
.
EOT


maillog:
--------------------------------------------------
Jul 21 16:36:23 overload postfix/master[94276]: reload configuration
Jul 21 16:36:41 overload postfix/pickup[99806]: F2F804AC23: uid=0 from=<root>
Jul 21 16:36:42 overload postfix/cleanup[99812]: F2F804AC23: message-id=<20030721143641.F2F804AC23@overload.ugly-sheep.org>
Jul 21 16:36:42 overload postfix/qmgr[99807]: F2F804AC23: from=<root@ugly-sheep.org>, size=322, nrcpt=1 (queue active)
Jul 21 16:36:42 overload postfix/virtual[99814]: F2F804AC23: to=<devnull@hispeed.ch>, relay=virtual, delay=1, status=bounced (unknown user: &quot;devnull@hispeed.ch&quot
Jul 21 16:36:42 overload postfix/cleanup[99812]: D77334AC25: message-id=<20030721143642.D77334AC25@overload.ugly-sheep.org>
Jul 21 16:36:42 overload postfix/qmgr[99807]: D77334AC25: from=<>, size=1960, nrcpt=1 (queue active)
Jul 21 16:36:42 overload postfix/trivial-rewrite[99813]: warning: do not list domain ugly-sheep.org in BOTH mydestination and virtual_mailbox_domains
Jul 21 16:36:42 overload postfix/virtual[99814]: D77334AC25: to=<chris.armstrong@ugly-sheep.org>, orig_to=<root@ugly-sheep.org>, relay=virtual, delay=0, status=sent (maildir)


main.cf:
--------------------------------------------------------
#########################################################
# SETUP VARIABLES
#########################################################
biff = no
smtpd_banner = $myhostname (SPAMMERS FUCK OF PLEASE)
debug_peer_level = 2
delay_warning_time = 4
command_directory = /usr/local/sbin
config_directory = /usr/local/etc/postfix
daemon_directory = /usr/local/libexec/postfix
program_directory = /usr/local/libexec/postfix
mail_owner = postfix

myhostname = overload.ugly-sheep.org
mydomain = ugly-sheep.org
myorigin = $mydomain
mydestination = $myhostname, $mydomain, localhost.$mydomain, localhost
mynetworks = 127.0.0.0/8, 217.8.193.3

relayhost = 217.8.192.20


#########################################################
# DELIVERY TO VIRTUAL ACCOUNTS AND ALIASES
#########################################################
virtual_alias_domains = $virtual_maps
virtual_maps = hash:/usr/local/etc/postfix/db/virtual, hash:/usr/local/etc/postfix/db/aliases
#transport_maps = hash:/usr/local/etc/postfix/db/transport


#########################################################
# ATTACK AND SPAM RULES
#########################################################
header_checks = regexp:/usr/local/etc/postfix/regex/header_checks
body_checks = regexp:/usr/local/etc/postfix/regex/body_checks

# The disable_vrfy_command parameter allows
# you to disable the SMTP VRFY command. This
# stops some techniques used by spammers to
# harvest email addresses.
disable_vrfy_command = yes

# The smtpd_etrn_restrictions parameter
# restricts what clients are allowed to
# issue the ETRN command. The present
# Postfix ETRN differs from other ETRN
# implementations in that it flushes
# mail for all destinations. This will
# change in the future.
smtpd_etrn_restriction = reject

bounce_size_limit = 65536
header_size_limit = 32768
smtpd_recipient_limit = 128
smtpd_timeout = 180
allow_untrusted_routing = no
unknown_local_recipient_reject_code = 550
strict_rfc821_envelopes = yes
smtpd_soft_error_limit = 10
smtpd_hard_error_limit = 25
smtpd_restriction_classes = verify_sender

verify_sender =
reject_unverified_sender,
permit


#########################################################
# DELIVERY TO LOCAL LDAP ACCOUNTS
#########################################################
local_transport = virtual
recipient_limit = 1500
message_size_limit = 10280000
mailbox_size_limit = 20480000

virtual_minimum_uid = 20
virtual_uid_maps = static:27
virtual_gid_maps = static:27
virtual_mailbox_maps = ldap:ldapsource
virtual_mailbox_domains = static:/usr/local/etc/postfix/static/relaydomains
virtual_mailbox_size_limit = ldap:ldapquota
virtual_mailbox_base =/data/home
virtual_maildir_extended = yes

ldapquota_timeout = 10
ldapquota_server_host = localhost
ldapquota_search_base = ou=mailaccounts,dc=ugly-sheep,dc=org
ldapqouta_server_port = 389
ldapquota_domain = ugly-sheep.org,nomex.ch
ldapquota_query_filter = (&(mail=%s)(accountstatus=active))
ldapquota_result_attribute = mailquota
ldapquota_bind = yes
ldapquota_bind_dn = cn=Manager,dc=ugly-sheep,dc=org
ldapquota_bind_pw = ******

ldapsource_timeout = 10
ldapsource_server_host = localhost
ldapsource_search_base = ou=mailaccounts,dc=ugly-sheep,dc=org
ldapsource_server_port = 389
ldapsource_query_filter = (&(mail=%s)(accountstatus=active))
ldapsource_result_attribute = mailbox
ldapsource_bind = yes
ldapsource_bind_dn = cn=Manager,dc=ugly-sheep,dc=org
ldapsource_bind_pw = ******


#########################################################
# SMTPD SENDER RESTRICTIONS
#########################################################
smtpd_client_restrictions =
permit_mynetworks,
check_client_access hash:/usr/local/etc/postfix/db/access_client,
reject_rbl_client bl.spamcop.net,
reject_rbl_client relays.ordb.org,
reject_rbl_client spews.relays.osirusoft.com,
reject_rbl_client proxies.relays.monkeys.com,
reject_rbl_client sbl.spamhaus.org,
permit

smtpd_helo_required = yes
smtpd_helo_restrictions =
permit_mynetworks,
check_helo_access hash:/usr/local/etc/postfix/db/access_helo,
reject_non_fqdn_hostname,
reject_unknown_hostname,
reject_invalid_hostname,
permit

smtpd_sender_restrictions =
permit_mynetworks,
check_sender_access hash:/usr/local/etc/postfix/db/access_sender,
reject_non_fqdn_sender,
reject_unknown_sender_domain,
permit

smtpd_recipient_restrictions = permit_mynetworks,
reject_non_fqdn_recipient,
check_relay_domains,
reject_unauth_pipelining,
reject_non_fqdn_recipient,
reject_unknown_sender_domain,
reject_unknown_recipient_domain,
reject_unauth_destination,
reject_invalid_hostname,
reject_non_fqdn_hostname,
permit