>Показывайте свои правила. Будем посмотреть.
Спасибо, main.cf примерно такой:
...
#
smptd_helo_required = yes
disable_vrfy_command = yes
# Check bad domains - etc/postfix/helo_checks
smptd_helo_restrictions =
permit_mynetworks,
check_helo_access hash:/etc/postfix/helo_checks,
check_helo_access regexp:/etc/postfix/helo_checks_pcre,
reject_invalid_hostname,
reject_non_fqdn_hostname,
reject_unknown_hostname
smtpd_sender_restrictions =
permit_mynetworks,
check_helo_access hash:/etc/postfix/helo_checks,
check_helo_access regexp:/etc/postfix/helo_checks_pcre,
reject_non_fqdn_sender,
reject_unknown_sender_domain,
reject_unknown_hostname
smtpd_recipient_restrictions =
permit_mynetworks,
reject_unauth_destination,
check_helo_access hash:/etc/postfix/helo_checks,
check_helo_access regexp:/etc/postfix/helo_checks_pcre,
reject_invalid_hostname,
reject_unknown_hostname,
reject_non_fqdn_hostname,
reject_non_fqdn_sender,
permit
smtpd_data_restrictions =
reject_unauth_pipelining,
permit
# Check bad zones:
smtpd_client_restrictions =
permit_mynetworks,
check_client_access regexp:/etc/postfix/check_client_pcre,
reject_unknown_client
local_recipient_maps = hash:/etc/postfix/users $alias_maps
unknown_local_recipient_reject_code = 554
# Tarpitting
smtpd_error_sleep_time = 10
smtpd_soft_error_limit = 2
smtpd_hard_error_limit = 2
...