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cbelote 1st March 2010 22:23

mail server not working
I followed the tutorial: The Perfect Server - Ubuntu 9.10 [ISPConfig 3]. I have setup a mail account in ISPConfig, forwarded IMAP, POP3, and SMTP ports to my server, white listed email addresses, ensured my ISP is not blocking any of my ports and ensured my MX records point to my server. I am not receiving emails to or from the new email address and have not received any non-delivery messages! ISPConfig is showing no traffic on the new account either.


I am not sure what to do next as I have exhausted my technical knowledge here :( any help is much appreciated in advance!

cbelote 2nd March 2010 02:39

Ok, to update on my issue: I have gotten a delivery fail message from my mail server saying "unknown user: admin" My domain is by the way. Now for the wierd part: I am getting every other email message (2 out of 4) sent to this admin account in my /var/mail/ directory.

falko 2nd March 2010 17:55

Any errors in your mail log? What's in /etc/postfix/

cbelote 3rd March 2010 05:22

Re: mail server not working
First, thank's falko for the help. You're a genius when it comes to this stuff :)
Here are the errors I see in my mail warn log:


Mar 2 17:44:23 cpb3 postfix/smtpd[19551]: warning: hostname smtp125 verification failed: Name or service not known
Mar 2 17:44:24 cpb3 postfix/trivial-rewrite[19554]: warning: do not list domain in BOTH mydestination and virtual_mailbox_domains

Here is what seems to be repeated every few minuites in my mail log:


Mar 2 20:05:01 cpb3 pop3d: Connection, ip=[::ffff:]
Mar 2 20:05:01 cpb3 pop3d: Disconnected, ip=[::ffff:]
Mar 2 20:05:01 cpb3 imapd: Connection, ip=[::ffff:]
Mar 2 20:05:01 cpb3 imapd: Disconnected, ip=[::ffff:], time=0
Mar 2 20:05:01 cpb3 postfix/smtpd[21183]: connect from localhost.localdomain[]
Mar 2 20:05:01 cpb3 postfix/smtpd[21183]: lost connection after CONNECT from localhost.localdomain[]
Mar 2 20:05:01 cpb3 postfix/smtpd[21183]: disconnect from localhost.localdomain[]

Here's my


# See /usr/share/postfix/ for a commented, more complete version

# Debian specific:  Specifying a file name will cause the first
# line of that file to be used as the name.  The Debian default
# is /etc/mailname.
#myorigin = /etc/mailname

smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
biff = no

# appending .domain is the MUA's job.
append_dot_mydomain = no

# Uncomment the next line to generate "delayed mail" warnings
#delay_warning_time = 4h

readme_directory = /usr/share/doc/postfix

# TLS parameters
smtpd_tls_cert_file = /etc/postfix/smtpd.cert
smtpd_tls_key_file = /etc/postfix/smtpd.key
smtpd_use_tls = yes
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache

# See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for
# information on enabling SSL in the smtp client.

myhostname =
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname
mydestination =, localhost, localhost.localdomain
relayhost =
mynetworks = [::1]/128
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
html_directory = /usr/share/doc/postfix/html
virtual_alias_domains =
virtual_alias_maps = proxy:mysql:/etc/postfix/, mysql:/etc/postfix/
virtual_mailbox_domains = proxy:mysql:/etc/postfix/
virtual_mailbox_maps = proxy:mysql:/etc/postfix/
virtual_mailbox_base = /var/vmail
virtual_uid_maps = static:5000
virtual_gid_maps = static:5000
smtpd_sasl_auth_enable = yes
broken_sasl_auth_clients = yes
smtpd_sasl_authenticated_header = yes
smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, check_recipient_access mysql:/etc/postfix/, reject_unauth_destination
smtpd_tls_security_level = may
transport_maps = proxy:mysql:/etc/postfix/
relay_domains = mysql:/etc/postfix/
virtual_create_maildirsize = yes
virtual_maildir_extended = yes
virtual_mailbox_limit_maps = proxy:mysql:/etc/postfix/
virtual_mailbox_limit_override = yes
virtual_maildir_limit_message = "The user you are trying to reach is over quota."
virtual_overquota_bounce = yes
proxy_read_maps = $local_recipient_maps $mydestination $virtual_alias_maps $virtual_alias_domains $virtual_mailbox_maps $virtual_mailbox_domains $relay_recipient_maps $relay_domains $canonical_maps $sender_canonical_maps $recipient_canonical_maps $relocated_maps $transport_maps $mynetworks $virtual_mailbox_limit_maps
smtpd_sender_restrictions = check_sender_access mysql:/etc/postfix/
smtpd_client_restrictions = check_client_access mysql:/etc/postfix/
maildrop_destination_concurrency_limit = 1
maildrop_destination_recipient_limit = 1
virtual_transport = maildrop
header_checks = regexp:/etc/postfix/header_checks
mime_header_checks = regexp:/etc/postfix/mime_header_checks
nested_header_checks = regexp:/etc/postfix/nested_header_checks
body_checks = regexp:/etc/postfix/body_checks
content_filter = amavis:[]:10024
receive_override_options = no_address_mappings
message_size_limit = 0

cbelote 3rd March 2010 11:50

I might have resolved my issue:

#1. My IP was, for some strange reason, on a Spamhaus black list. I had it removed (which is ironic because I run a spam bot honey pot on my site lol)

#2. I solved the duplicate domain name issue in mydestination and virtual_mailbox_domain by removing it from the mydestination line in /etc/postfix/ and restarting Postfix.

Thanks falko for the guidance! I'll subscribe once I get the money to do so :)

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