From: Carlos Williams (carloswillgmail.com)
Date: Wed Jul 29 2009 - 13:35:42 CDT

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I am checking my mail queue and I have noticed that mail in my queue
is stuck with the following error:

AA83077925B 1508 Sun Jul 26 10:22:31 rheinleinsimulationinformation.com
(host mx.dr1.us.army.mil[143.69.243.34] said: 451 #4.1.8 Domain of
sender address <rheinleinsimulationinformation.com> does not resolve
(in reply to MAIL FROM command))
                                         james.todd3us.army.mil

4094D77921F 1520 Sun Jul 26 10:22:31 rheinleinsimulationinformation.com
(host mx.dr1.us.army.mil[143.69.243.34] said: 451 #4.1.8 Domain of
sender address <rheinleinsimulationinformation.com> does not resolve
(in reply to MAIL FROM command))
                                         brianomitted_domain.com

2EF15779273 1503 Sun Jul 26 10:22:32 rheinleinsimulationinformation.com
(host mx.ps1.us.army.mil[143.69.251.34] said: 451 #4.1.8 Domain of
sender address <rheinleinsimulationinformation.com> does not resolve
(in reply to MAIL FROM command))
                                         thomasomitted_domain.com

78BCE779279 1499 Sun Jul 26 10:22:31 rheinleinsimulationinformation.com
(host mx.dr1.us.army.mil[143.69.243.34] said: 451 #4.1.8 Domain of
sender address <rheinleinsimulationinformation.com> does not resolve
(in reply to MAIL FROM command))
                                         frankomitted_domain.com

My domain is not the domain I omitted from the log entries and I
checked /var/log/maillog to find the same error in my mail logs. I am
concerned as to why my Postfix server is handling mail for the omitted
domain. That domain is a .mil domain which has nothing to do with my
Postfix server.

***Postconf -n***

[rootmail ~]# postconf -n
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
broken_sasl_auth_clients = yes
command_directory = /usr/sbin
config_directory = /etc/postfix
content_filter = amavisfeed:[127.0.0.1]:10024
daemon_directory = /usr/libexec/postfix
home_mailbox = mail/
html_directory = no
inet_interfaces = all
mail_owner = postfix
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
mydestination = $myhostname, $mydomain, mail.$mydomain
mydomain = iamghost.com
myhostname = mail.iamghost.com
mynetworks = $config_directory/mynetworks
myorigin = $mydomain
newaliases_path = /usr/bin/newaliases.postfix
queue_directory = /var/spool/postfix
relay_domains =
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
smtpd_banner = $myhostname ESMTP
smtpd_delay_reject = yes
smtpd_helo_required = yes
smtpd_helo_restrictions = permit_mynetworks,
permit_sasl_authenticated, reject_non_fqdn_helo_hostname,
reject_invalid_helo_hostname, permit
smtpd_recipient_restrictions = permit_mynetworks,
permit_sasl_authenticated, reject_unauth_pipelining,
reject_non_fqdn_recipient, reject_unknown_recipient_domain,
reject_unauth_destination, reject_unlisted_recipient,
check_policy_service unix:postgrey/socket, check_sender_access
  hash:/etc/postfix/sender_access, reject_rbl_client
zen.spamhaus.org, reject_rbl_client bl.spamcop.net, permit
smtpd_sasl_auth_enable = yes
smtpd_sasl_path = private/auth
smtpd_sasl_security_options = noanonymous
smtpd_sasl_type = dovecot
smtpd_sender_restrictions = permit_mynetworks,
permit_sasl_authenticated, reject_non_fqdn_sender,
reject_unknown_sender_domain,
reject_unknown_reverse_client_hostname, permit
smtpd_tls_CAfile = /etc/ssl/intermediate.crt
smtpd_tls_auth_only = yes
smtpd_tls_cert_file = /etc/ssl/mail.crt
smtpd_tls_key_file = /etc/ssl/mail.key
smtpd_tls_loglevel = 1
smtpd_tls_security_level = may
smtpd_tls_session_cache_database = btree:/var/spool/postfix/smtpd_tls_cache
smtpd_tls_session_cache_timeout = 3600s
tls_random_source = dev:/dev/urandom
unknown_local_recipient_reject_code = 550

Can someone please help me understand why I am getting this several of
the same entries showing up in my log entries? I don't think the
sender is a spammer and this might be legitimate email but I can't
understand why it's flowing through my SMTP server...

- Carlos

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