Есть вебсервер, на нем postfix. При отправке письма через PHP mail() проходит минут 15 пока письмо реально уйдет. Подскажите где копать? Конфиг postfix такой:

queue_directory = /var/spool/postfix command_directory = /usr/sbin daemon_directory = /usr/libexec/postfix data_directory = /var/lib/postfix mail_owner = postfix myhostname = extmail.DOMAIN.com mydomain = DOMAIN2.ru myorigin = $myhostname inet_protocols = all mydestination = $myhostname, localhost.$mydomain, localhost unknown_local_recipient_reject_code = 550 mynetworks_style = subnet mynetworks = 127.0.0.0/8,89.21.77.88/32 relay_domains = mysql:/etc/postfix/mysql-virtual_relay_domains.cf alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases smtpd_banner = $myhostname ESMTP $mail_name ($mail_version) 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.postfix newaliases_path = /usr/bin/newaliases.postfix mailq_path = /usr/bin/mailq.postfix setgid_group = postdrop html_directory = no manpage_directory = /usr/share/man sample_directory = /usr/share/doc/postfix-2.6.6/samples readme_directory = /usr/share/doc/postfix-2.6.6/README_FILES smtp_bind_address = 88.98.112.24 inet_protocols = ipv4 smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, check_client_access hash:/etc/postfix/access-client, check_sender_access hash:/etc/postfix/whitelist, reject_unlisted_recipient, reject_non_fqdn_sender, reject_non_fqdn_recipient, reject_unauth_destination, reject_unauth_pipelining, reject_invalid_hostname, reject_unknown_sender_domain, reject_unknown_recipient_domain, reject_rbl_client cbl.abuseat.org, reject_rbl_client relays.mail-abuse.org, reject_rbl_client dnsbl.njabl.org, reject_rbl_client combined.njabl.org, reject_rbl_client bl.spamcop.net, reject_rbl_client zen.spamhaus.org, permit smtpd_client_restrictions = check_client_access hash:/etc/postfix/access-client, permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination, reject_unknown_recipient_domain, reject_invalid_hostname, reject_non_fqdn_recipient permit # ограничения на приветствие отправителя HELO/EHLO smtpd_helo_restrictions = check_helo_access hash:/etc/postfix/helo_access, permit_sasl_authenticated, permit_mynetworks, reject_non_fqdn_hostname, reject_invalid_hostname, reject_unknown_hostname, permit # ограничения, проверяемые на этапе MAIL FROM: smtpd_sender_restrictions = # принимаем почту на отправку с «чужих» хостов, если пользователь # авторизовался по логину/паролю permit_sasl_authenticated, # «своим» можно и «просто» permit_mynetworks, # см комментарий к разделу smtpd_helo_restrictions reject_non_fqdn_sender, reject_unknown_sender_domain, # если все вышеперечисленное подошло, идем дальше permit soft_bounce = no myhostname = extmail.DOMAIN.com mydomain = DOMAIN2.ru myorigin = $myhostname mydestination = localhost.$mydomain, localhost alias_maps = hash:/etc/aliases smtpd_banner = $myhostname ESMTP $mail_name # ============================================================ # LIMITS # ============================================================ message_size_limit = 51200000 smtpd_soft_error_limit = 10 smtpd_hard_error_limit = 15 smtpd_error_sleep_time = 20 anvil_rate_time_unit = 60s smtpd_client_connection_count_limit = 20 smtpd_client_connection_rate_limit = 30 smtpd_client_message_rate_limit = 30 smtpd_client_event_limit_exceptions = 127.0.0.0/8 smtpd_client_connection_limit_exceptions = 127.0.0.0/8 # ============================================================ # QUEUE # ============================================================ maximal_queue_lifetime = 1d bounce_queue_lifetime = 1d # ============================================================ # TLS # ============================================================ smtp_tls_security_level = may smtpd_tls_security_level = may smtpd_tls_loglevel = 1 smtpd_tls_received_header = yes smtpd_tls_session_cache_timeout = 3600s smtp_tls_session_cache_database = btree:$data_directory/smtp_tls_session_cache smtpd_tls_key_file = /etc/postfix/certs/key.pem smtpd_tls_cert_file = /etc/postfix/certs/cert.pem tls_random_source = dev:/dev/urandom # ============================================================ # SASL # ============================================================ smtpd_sasl_auth_enable = yes smtpd_sasl_security_options = noanonymous smtpd_sasl_type = dovecot smtpd_sasl_path = private/auth smtpd_sasl_local_domain = $myhostname smtpd_sasl_authenticated_header = yes smtpd_helo_required = no # ============================================================ # VIRTUAL # ============================================================ virtual_mailbox_base = /var/vmail virtual_minimum_uid = 1000 virtual_uid_maps = static:1000 virtual_gid_maps = static:1000 virtual_transport = dovecot dovecot_destination_recipient_limit = 1 home_mailbox = Maildir/ virtual_mailbox_domains = mysql:/etc/postfix/mysql-virtual_mailbox_domains.cf virtual_mailbox_maps = mysql:/etc/postfix/mysql-virtual_mailbox_maps.cf virtual_alias_maps = mysql:/etc/postfix/mysql-virtual_alias_maps.cf content_filter=amavisfeed:[127.0.0.1]:10024