Здравствуйте. проблема заключается в следующем периодически не принимается новая почта в логах
postfix/smtpd[91073]: NOQUEUE: reject: RCPT from mail.domain.ru[IP]: 451 4.3.0 <forum@domain.ru>: Temporary lookup failure; from=<forum@domain.ru> to=<email@mail.RU> proto=ESMTP helo=<mail.domain.ru>

ecли включить логирование smtpd в master.cf
smtp      inet  n       -       n       -       -       smtpd -v

то видем предшествующие строчки
Nov 11 15:36:49 web postfix/smtpd[91073]: maps_find: virtual_alias_maps: forum@domain.ru: search aborted
Nov 11 15:36:49 web postfix/smtpd[91073]: mail_addr_find: forum@domain.ru -> (try again)
Nov 11 15:36:49 web postfix/smtpd[91073]: NOQUEUE: reject: RCPT from mail.domain.ru[IP]: 451 4.3.0 <forum@domain.ru>: Temporary lookup failure; from=<forum@domain.ru> to=<email@mail.ru> proto=ESMTP helo=<mail.domain.ru>
Nov 11 15:36:49 web postfix/smtpd[91073]: > mail.domain.ru[IP]: 451 4.3.0 <forum@domain.ru>: Temporary lookup failure

в mysql нет запросов выполняюшихся больше секунды и даже приближения к максимальному числу запросов.
сервер на базе freebsd 7 postfix 2.6.5

postconf -n
address_verify_sender = <>
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
broken_sasl_auth_clients = yes
command_directory = /usr/local/sbin
config_directory = /usr/local/etc/postfix
daemon_directory = /usr/local/libexec/postfix
data_directory = /var/db/postfix
default_process_limit = 100
disable_vrfy_command = yes
html_directory = /usr/local/share/doc/postfix
local_recipient_maps = unix:passwd.byname $alias_maps
mail_owner = postfix
mailbox_size_limit = 107374182
mailq_path = /usr/local/bin/mailq
manpage_directory = /usr/local/man
message_size_limit = 107374182
mydestination = $myhostname, localhost.$mydomain, localhost
mydomain = domain.ru
myhostname = mail.domain.ru
mynetworks = 127.0.0.0/8, 10.10.0.0/24,
myorigin = $mydomain
newaliases_path = /usr/local/bin/newaliases
queue_directory = /var/spool/postfix
readme_directory = /usr/local/share/doc/postfix
sample_directory = /usr/local/etc/postfix
sendmail_path = /usr/local/sbin/sendmail
setgid_group = maildrop
show_user_unknown_table_name = no
smtp_always_send_ehlo = yes
smtpd_banner = $myhostname ESMTP
smtpd_client_restrictions = permit_mynetworks,                             permit_sasl_authenticated,                             check_client_access hash:$base/client_access,                             reject_unknown_client_hostname
smtpd_error_sleep_time = 0
smtpd_etrn_restrictions = reject
smtpd_hard_error_limit = 8
smtpd_helo_required = yes
smtpd_helo_restrictions = check_helo_access hash:$base/hello_access,                                permit_mynetworks,                                permit_sasl_authenticated,                                reject_invalid_helo_hostname,                                reject_non_fqdn_helo_hostname                                reject_unknown_helo_hostname
smtpd_recipient_restrictions = permit_mynetworks,                                permit_sasl_authenticated,                                reject_unauth_destination,                                check_recipient_access hash:$base/recipient_access,                                reject_unlisted_recipient,                                reject_unknown_recipient_domain,                                reject_non_fqdn_recipient,                                reject_unverified_recipient,                               check_policy_service inet:127.0.0.1:10023
smtpd_reject_unlisted_sender = yes
smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
smtpd_sender_login_maps = mysql:$base/mysqlLookupMaps/sender.conf
smtpd_sender_restrictions = permit_mynetworks,                          permit_sasl_authenticated,                                check_sender_access hash:$base/sender_access,                                reject_authenticated_sender_login_mismatch,                                reject_unknown_sender_domain,                                reject_unlisted_sender,                                reject_unverified_sender
strict_rfc821_envelopes = yes
unknown_local_recipient_reject_code = 550
unverified_sender_reject_code = 550
virtual_alias_maps = mysql:$base/mysqlLookupMaps/alias.conf
virtual_gid_maps = static:1981
virtual_mailbox_base = /var/spool/mail
virtual_mailbox_domains = mysql:$base/mysqlLookupMaps/domain.conf
virtual_mailbox_limit = 107374182
virtual_mailbox_limit_maps = mysql:$base/mysqlLookupMaps/quota.conf
virtual_mailbox_limit_override = yes
virtual_mailbox_maps = mysql:$base/mysqlLookupMaps/mailbox.conf
virtual_maildir_extended = yes
virtual_maildir_limit_message = "Sorry, the user's maildir has overdrawn his diskspace quota, please try again later"
virtual_minimum_uid = 1000
virtual_overquota_bounce = yes
virtual_uid_maps = static:1981

бьюсь уже второй день что делать уже просто не представляю)