On Wed, April 29, 2015 22:26, Viktor Dukhovni wrote:
>
> The fact that the same name fails HELO checks (which don't use the
> default suffixes) is not unexpected.
>
Actually, my suspicion was that this was a case of cause and effect.
The reject due to the host name lookup failure was the result of the
process that was generating the additional dns queries. I just want
to find out if the behaviour is expected or abnormal.
I presume that there is some setting in Postfix that governs this
behaviour and I would like to discover what that is, if indeed one
exists.
I discovered:
smtp_dns_resolver_options (default: empty)
and these
smtp_dns_support_level = dnssec
smtp_host_lookup = dns
But none of these seem to control the appending of our local search
domains to incoming smtp traffic from external network addresses. I
am perplexed as to why this behaviour occurs at all for that
circumstance.
postconf -n
alias_maps = hash:/etc/aliases
broken_sasl_auth_clients = yes
command_directory = /usr/sbin
config_directory = /etc/postfix
content_filter = smtp-amavis:[127.0.0.1]:10024
daemon_directory = /usr/libexec/postfix
data_directory = /var/lib/postfix
debugger_command = PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin
ddd $daemon_directory/$process_name $process_id & sleep 5
delay_warning_time = 30m
disable_vrfy_command = yes
header_checks = regexp:/etc/postfix/header_checks.regexp
home_mailbox = Maildir/
html_directory = no
ignore_mx_lookup_error = no
inet_interfaces = localhost, inet08.hamilton.harte-lyne.ca
inet_protocols = all
local_transport = smtp
mail_spool_directory = /var/spool/mail
mailman_destination_recipient_limit = 1
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
message_size_limit = 20480000
milter_default_action = accept
milter_protocol = 2
mydestination =
mynetworks = 216.185.71.0/26, 209.47.176.0/26, 127.0.0.0/8
newaliases_path = /usr/bin/newaliases.postfix
non_smtpd_milters = $smtpd_milters
policyd-spf_time_limit = 3600
queue_minfree = 40960000
rbl_reply_maps = hash:/etc/postfix/rbl_reply
readme_directory = /usr/share/doc/postfix-2.11.1/README_FILES
recipient_delimiter = +
relay_clientcerts = hash:/etc/postfix/relay_clientcerts
relay_domains = hash:/etc/postfix/relay_domains
sample_directory = /usr/share/doc/postfix-2.11.1/samples
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
smtp_dns_support_level = dnssec
smtp_host_lookup = dns
smtp_tls_CAfile = /etc/pki/tls/certs/ca-bundle.crt
smtp_tls_cert_file = /etc/pki/tls/certs/ca.harte-lyne.hamilton.smtp.crt
smtp_tls_key_file = /etc/pki/tls/private/ca.harte-lyne.hamilton.smtp.key
smtp_tls_security_level = dane
smtp_tls_session_cache_database = btree:/var/lib/postfix/smtp_scache
smtp_tls_session_cache_timeout = 3600s
smtp_use_tls = yes
smtpd_client_restrictions = permit
smtpd_data_restrictions = permit_mynetworks,
reject_multi_recipient_bounce, reject_unauth_pipelining, permit
smtpd_helo_required = yes
smtpd_helo_restrictions = permit_mynetworks, check_helo_access
pcre:/etc/postfix/helo_checks.pcre, reject_non_fqdn_helo_hostname,
reject_unknown_helo_hostname, permit
smtpd_milters = inet:127.0.0.1:8891
smtpd_proxy_timeout = 300s
smtpd_recipient_restrictions = reject_non_fqdn_recipient,
reject_unknown_recipient_domain, permit_mynetworks,
permit_sasl_authenticated, reject_unauth_destination,
reject_unauth_pipelining, check_policy_service
unix:/var/spool/postfix/postgrey/socket, check_policy_service
unix:private/policyd-spf, permit
smtpd_relay_restrictions = permit_mynetworks,
permit_sasl_authenticated, defer_unauth_destination
smtpd_sasl_auth_enable = yes
smtpd_sasl_path = smtpd
smtpd_sender_restrictions = permit_mynetworks, check_sender_access
hash:/etc/postfix/sender_access, check_sender_mx_access
hash:/etc/postfix/sender_mx_access, check_sender_ns_access
hash:/etc/postfix/sender_ns_access, permit_sasl_authenticated,
reject_non_fqdn_sender, reject_unknown_sender_domain, permit
smtpd_starttls_timeout = ${stress?10}${stress:120}s
smtpd_timeout = ${stress?10}${stress:120}s
smtpd_tls_CAfile = /etc/pki/tls/certs/ca-bundle.crt
smtpd_tls_ask_ccert = yes
smtpd_tls_auth_only = yes
smtpd_tls_cert_file = /etc/pki/tls/certs/ca.harte-lyne.hamilton.smtp.crt
smtpd_tls_fingerprint_digest = sha1
smtpd_tls_key_file = /etc/pki/tls/private/ca.harte-lyne.hamilton.smtp.key
smtpd_tls_received_header = yes
smtpd_tls_security_level = may
smtpd_tls_session_cache_database = btree:/var/lib/postfix/smtpd_scache
smtpd_tls_session_cache_timeout = 3600s
smtpd_use_tls = yes
soft_bounce = no
strict_rfc821_envelopes = yes
tls_random_source = dev:/dev/urandom
transport_maps = hash:/etc/postfix/transport
unknown_local_recipient_reject_code = 550
virtual_alias_maps = hash:/etc/postfix/virtual,
regexp:/etc/postfix/virtual.regexp
--
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Do NOT transmit sensitive data via e-Mail
James B. Byrne mailto:byrn...@harte-lyne.ca
Harte & Lyne Limited http://www.harte-lyne.ca
9 Brockley Drive vox: +1 905 561 1241
Hamilton, Ontario fax: +1 905 561 0757
Canada L8E 3C3
