Вот полностью содержание моего main.cf:
queue_directory = /var/spool/postfix
command_directory = /usr/local/sbin
daemon_directory = /usr/local/libexec/postfix
mail_owner = postfix
myhostname = mail2.pnmc.ru
mydomain = pnmc.ru
inet_interfaces = 10.100.10.3, 192.168.0.44
mydestination = $myhostname, $mydomain, pnmc-cip.ru
unknown_local_recipient_reject_code = 550
alias_maps = hash:/etc/aliases
mail_spool_directory = /var/mail
smtpd_banner = $myhostname mail server
debug_peer_level = 2
debugger_command =
PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin
xxgdb $daemon_directory/$process_name $process_id & sleep 5
sendmail_path = /usr/local/sbin/sendmail
newaliases_path = /usr/local/bin/newaliases
mailq_path = /usr/local/bin/mailq
setgid_group = maildrop
manpage_directory = /usr/local/man
sample_directory = /usr/local/etc/postfix
readme_directory = no
maps_rbl_reject_code = 554
smtpd_recipient_restrictions =
permit_mynetworks,
reject_unauth_destination,
reject_rbl_client list.dsbl.org,
reject_rbl_client relays.ordb.org,
reject_rbl_client dynablock.wirehub.net,
reject_rbl_client blackholes.wirehub.net,
reject_rbl_client dnsbl.njabl.org
transport_maps = mysql:/usr/local/etc/postfix/sql/transport.cf
virtual_mailbox_base = /var/mail/virtual
virtual_mailbox_maps = mysql:/usr/local/etc/postfix/sql/users.cf
virtual_alias_maps = mysql:/usr/local/etc/postfix/sql/aliases.cf
virtual_uid_maps = mysql:/usr/local/etc/postfix/sql/uids.cf
virtual_gid_maps = mysql:/usr/local/etc/postfix/sql/gids.cf
relay_domains = $transport_maps
local_recipient_maps = $virtual_mailbox_maps $virtual_maps $transport_maps