Topic: Cannot send or receive mail

Hello, I have a new CentOS 5 guest vm server that I installed iRedMail on. The installation went fine as far as I could tell. A couple days later I migrated email from one of my personal domains to the new server by editing the DNS records to point to the new server's ip address. Once the DNS records migrated, I checked e-mail by sending and receiving and found that neither is working correctly.

I get the following error after logging into squirrelmail with user@domain.com account that I created using postfixadmin:

Message not sent. Server replied:

    Requested action aborted: error in processing
    451 4.3.5 Server configuration problem

In the /var/log/maillog, I get the following errors on mail I try to send to the server from my gmail account:

Feb 16 10:45:05 server postfix/smtpd[30901]: C3521AA03E8: reject: END-OF-MESSAGE from unknown[]: 451 4.3.5 Server configuration problem; from=<hawk82@gmail.com> to=<user@domain.com> proto=ESMTP helo=<qw-out-2122.google.com>

The mail is queuing up. I have several of those error messages as the google servers retry sending the test email.

output from postconf -n

alias_database = hash:/etc/postfix/aliases
alias_maps = hash:/etc/postfix/aliases
allow_min_user = no
biff = no
bounce_queue_lifetime = 1d
broken_sasl_auth_clients = yes
command_directory = /usr/sbin
config_directory = /etc/postfix
content_filter = smtp-amavis:[]:10024
daemon_directory = /usr/libexec/postfix
data_directory = /var/lib/postfix
debug_peer_level = 2
delay_warning_time = 0h
disable_vrfy_command = yes
enable_original_recipient = no
header_checks = pcre:/etc/postfix/header_checks.pcre
home_mailbox = Maildir/
html_directory = no
inet_interfaces = all
inet_protocols = all
mail_name = iRedMail
mail_owner = postfix
mail_version = 0.5.1
mailbox_command = /usr/libexec/dovecot/deliver
mailbox_size_limit = 15728640
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
maximal_backoff_time = 4000s
maximal_queue_lifetime = 1d
message_size_limit = 15728640
minimal_backoff_time = 300s
mydestination = $myhostname, localhost, localhost.localdomain, localhost.$myhostname
mydomain = domain.com
myhostname = server.domain.com
mynetworks =,, 69.49.x.x
mynetworks_style = subnet
myorigin = server.domain.com
newaliases_path = /usr/bin/newaliases.postfix
proxy_read_maps = $canonical_maps $lmtp_generic_maps $local_recipient_maps $mydestination $mynetworks $recipient_bcc_maps $recipient_canonical_maps $relay_domains $relay_recipient_maps $relocated_maps $sender_bcc_maps $sender_canonical_maps $smtp_generic_maps $smtpd_sender_login_maps $transport_maps $virtual_alias_domains $virtual_alias_maps $virtual_mailbox_domains $virtual_mailbox_maps
queue_directory = /var/spool/postfix
queue_run_delay = 300s
readme_directory = /usr/share/doc/postfix-2.5.9/README_FILES
recipient_bcc_maps = proxy:mysql:/etc/postfix/mysql_recipient_bcc_maps_domain.cf, proxy:mysql:/etc/postfix/mysql_recipient_bcc_maps_user.cf
relay_domains = $mydestination, proxy:mysql:/etc/postfix/mysql_relay_domains.cf
relay_recipient_maps = proxy:mysql:/etc/postfix/mysql_virtual_mailbox_maps.cf
sample_directory = /usr/share/doc/postfix-2.5.9/samples
sender_bcc_maps = proxy:mysql:/etc/postfix/mysql_sender_bcc_maps_domain.cf, proxy:mysql:/etc/postfix/mysql_sender_bcc_maps_user.cf
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
smtpd_data_restrictions = reject_unauth_pipelining
smtpd_end_of_data_restrictions = check_policy_service inet:
smtpd_enforce_tls = no
smtpd_helo_required = yes
smtpd_helo_restrictions = permit_mynetworks,permit_sasl_authenticated, check_helo_access pcre:/etc/postfix/helo_access.pcre
smtpd_recipient_restrictions = reject_unknown_sender_domain, reject_unknown_recipient_domain, reject_non_fqdn_sender, reject_non_fqdn_recipient, reject_unlisted_recipient, permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination, reject_non_fqdn_helo_hostname, reject_invalid_helo_hostname, check_policy_service inet:
smtpd_reject_unlisted_recipient = yes
smtpd_reject_unlisted_sender = yes
smtpd_sasl_auth_enable = yes
smtpd_sasl_authenticated_header = no
smtpd_sasl_local_domain =
smtpd_sasl_path = dovecot-auth
smtpd_sasl_security_options = noanonymous
smtpd_sasl_type = dovecot
smtpd_sender_login_maps = proxy:mysql:/etc/postfix/mysql_sender_login_maps.cf
smtpd_sender_restrictions = permit_mynetworks, permit_sasl_authenticated
smtpd_tls_cert_file = /etc/pki/tls/certs/iRedMail_CA.pem
smtpd_tls_key_file = /etc/pki/tls/private/iRedMail.key
smtpd_tls_loglevel = 0
smtpd_tls_security_level = may
tls_random_source = dev:/dev/urandom
transport_maps = proxy:mysql:/etc/postfix/mysql_transport_maps_user.cf, proxy:mysql:/etc/postfix/mysql_transport_maps_domain.cf
unknown_local_recipient_reject_code = 550
virtual_alias_maps = proxy:mysql:/etc/postfix/mysql_virtual_alias_maps.cf
virtual_gid_maps = static:501
virtual_mailbox_base = /var/vmail/vmail01
virtual_mailbox_domains = proxy:mysql:/etc/postfix/mysql_virtual_mailbox_domains.cf
virtual_mailbox_maps = proxy:mysql:/etc/postfix/mysql_virtual_mailbox_maps.cf
virtual_minimum_uid = 501
virtual_transport = dovecot
virtual_uid_maps = static:501

Mysqld is running, same with amavisd, dovecot, and policyd. Spam mail is being rejected as it should be.

Any thoughts as to where the issue is?

2 (edited by hawk82 2010-02-17 00:04:11)

Re: Cannot send or receive mail

I temporarily disabled policyd by commenting out the postfix main.cf line:
#smtpd_end_of_data_restrictions = check_policy_service inet:

I can now send mail using squirrelmail and mail is being sent/received by the server.So it would appear that is where the issue is.

Reading more into this, since I am the only person using this server, I don't think I need sender throttling enabled. I'll monitor the server to be sure it is working okay.


Re: Cannot send or receive mail

#smtpd_end_of_data_restrictions = check_policy_service inet:

This setting is disabled by default.