Не могу отправлять почту снаружи с помощью постфикса

У меня ниже сервер:

    [root@SR5S2]# uname -a
Linux SR5S2 2.6.16.60-0.74.7-smp #1 SMP Fri Nov 26 09:16:10 UTC 2010 x86_64 x86_64 x86_64 GNU/Linux
[root@SR5S2]# 

я настроил

/etc/postfix/main.cf

вот такой файл (здесь я удалил все комментарии, чтобы его было проще читать):

queue_directory = /var/spool/postfix
command_directory = /usr/sbin
daemon_directory = /usr/lib/postfix
data_directory = /var/lib/postfix
mail_owner = postfix
mydomain = EXCHANGESERVER.COM
myorigin = EXCHANGESERVER.COM
inet_interfaces = localhost                        
mydestination = 10.220.1.1
unknown_local_recipient_reject_code = 550
relay_domains = 10.220.1.1                      
relayhost = 10.220.1.1
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
debug_peer_level = 2
debugger_command =
     PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin
     ddd $daemon_directory/$process_name $process_id & sleep 5
sendmail_path = /usr/sbin/sendmail
newaliases_path = /usr/bin/newaliases
mailq_path = /usr/bin/mailq
setgid_group = maildrop
html_directory = /usr/share/doc/packages/postfix/html
manpage_directory = /usr/share/man
sample_directory = /usr/share/doc/packages/postfix/samples
readme_directory = /usr/share/doc/packages/postfix/README_FILES
inet_protocols = all
biff = no
mail_spool_directory = /var/mail
canonical_maps = hash:/etc/postfix/canonical
virtual_alias_maps = hash:/etc/postfix/virtual
virtual_alias_domains = hash:/etc/postfix/virtual
relocated_maps = hash:/etc/postfix/relocated
sender_canonical_maps = hash:/etc/postfix/sender_canonical
masquerade_exceptions = root
masquerade_classes = envelope_sender, header_sender, header_recipient
myhostname = EXCHANGESERVER.COM
program_directory = /usr/lib/postfix
defer_transports = 
relayhost = 10.220.1.1
mailbox_command = 
mailbox_transport = 
strict_8bitmime = no
disable_mime_output_conversion = no
smtpd_sender_restrictions = hash:/etc/postfix/access
smtpd_helo_required = no
smtpd_helo_restrictions = 
strict_rfc821_envelopes = no
smtpd_recipient_restrictions = permit_mynetworks,reject_unauth_destination
smtp_sasl_auth_enable = yes
smtpd_sasl_auth_enable = no
smtpd_use_tls = no
smtp_use_tls = no
mailbox_size_limit = 0
message_size_limit = 10240000

Я перезапустил постфиксную службу с помощью

/etc/init.d/postfix restart

Но когда я пытаюсь отправить почту (пробовал с sendmail, mail и mailx с точно таким же результатом), я получаю следующее сообщение в /var/log/mail:

Apr 19 17:43:47 SR5S2 postfix/pickup[15543]: A74F5DEC74: uid=0 from=<root>
Apr 19 17:43:47 SR5S2 postfix/cleanup[25616]: A74F5DEC74: message-id=<[email protected]>
Apr 19 17:43:47 SR5S2 postfix/qmgr[15544]: A74F5DEC74: from=<[email protected]>, size=344, nrcpt=1 (queue active)
Apr 19 17:43:47 SR5S2 postfix/qmgr[15544]: A74F5DEC74: to=<[email protected]>, relay=none, delay=0.04, delays=0.03/0.01/0/0, dsn=4.3.0, status=deferred (mail transport unavailable)

В котором говорится, что реле не было настроено. Но дело в том, что как видно из вышеописанного main.cf - он настроен.

Любые подсказки, почему я получаю эту ошибку? Где искать решение этой проблемы? Потратил уже 2 дня на эту проблему и никаких успехов :(

Вот вывод postconf -n:

[root@SR5S2]# postconf -n
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
biff = no
canonical_maps = hash:/etc/postfix/canonical
command_directory = /usr/sbin
config_directory = /etc/postfix
daemon_directory = /usr/lib/postfix
data_directory = /var/lib/postfix
debug_peer_level = 2
defer_transports = 
disable_dns_lookups = no
disable_mime_output_conversion = no
html_directory = /usr/share/doc/packages/postfix/html
inet_interfaces = 10.10.10.10
inet_protocols = all
mail_owner = postfix
mail_spool_directory = /var/mail
mailbox_command = 
mailbox_size_limit = 0
mailbox_transport = 
mailq_path = /usr/bin/mailq
manpage_directory = /usr/share/man
masquerade_classes = envelope_sender, header_sender, header_recipient
masquerade_exceptions = root
message_size_limit = 10240000
mydestination = 10.220.1.1
mydomain = EXCHANGESERVER.COM
myhostname = EXCHANGESERVER.COM
mynetworks_style = subnet
myorigin = azerconnect.az
newaliases_path = /usr/bin/newaliases
queue_directory = /var/spool/postfix
readme_directory = /usr/share/doc/packages/postfix/README_FILES
relay_domains = 10.220.1.1
relayhost = 10.220.1.1
relocated_maps = hash:/etc/postfix/relocated
sample_directory = /usr/share/doc/packages/postfix/samples
sender_canonical_maps = hash:/etc/postfix/sender_canonical
sendmail_path = /usr/sbin/sendmail
setgid_group = maildrop
smtp_sasl_auth_enable = yes
smtp_use_tls = no
smtpd_helo_required = no
smtpd_helo_restrictions = 
smtpd_recipient_restrictions = permit_mynetworks,reject_unauth_destination
smtpd_sasl_auth_enable = no
smtpd_sender_restrictions = hash:/etc/postfix/access
smtpd_use_tls = no
strict_8bitmime = no
strict_rfc821_envelopes = no
unknown_local_recipient_reject_code = 550
virtual_alias_domains = hash:/etc/postfix/virtual
virtual_alias_maps = hash:/etc/postfix/virtual
[root@SR5S2]#