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Old 25th October 2012, 01:08
pebkac pebkac is offline
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Join Date: Feb 2009
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I have this problem also. I've used ISPConfig for sometime and never had this problem with forwards. I have a forward setup, it is just a forward. When I send a test email from my gmail account I get this:

This is the mail system at host

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

                   The mail system

<>: user unknown
This forward is set like so: forwards to

Here is some config properties:

postconf -n
root@abda:/home/sysadmin# postconf -n
alias_database = hash:/etc/aliases, hash:/var/lib/mailman/data/aliases
alias_maps = hash:/etc/aliases, hash:/var/lib/mailman/data/aliases
append_dot_mydomain = no
biff = no
body_checks = regexp:/etc/postfix/body_checks
broken_sasl_auth_clients = yes
config_directory = /etc/postfix
dovecot_destination_recipient_limit = 1
header_checks = regexp:/etc/postfix/header_checks
html_directory = /usr/share/doc/postfix/html
mailbox_size_limit = 0
maildrop_destination_concurrency_limit = 1
maildrop_destination_recipient_limit = 1
message_size_limit = 0
mime_header_checks = regexp:/etc/postfix/mime_header_checks
mydestination =, localhost, localhost.localdomain
myhostname =
mynetworks = [::1]/128
myorigin = /etc/mailname
nested_header_checks = regexp:/etc/postfix/nested_header_checks
owner_request_special = no
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 $virtual_mailbox_limit_maps
readme_directory = /usr/share/doc/postfix
receive_override_options = no_address_mappings
recipient_delimiter = +
relay_domains = mysql:/etc/postfix/
relay_recipient_maps = mysql:/etc/postfix/
relayhost =
smtp_sasl_auth_enable = no
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_sasl_security_options =
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
smtpd_client_message_rate_limit = 100
smtpd_client_restrictions = check_client_access mysql:/etc/postfix/
smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, check_recipient_access mysql:/etc/postfix/, reject_unauth_destination
smtpd_sasl_auth_enable = yes
smtpd_sasl_authenticated_header = yes
smtpd_sasl_path = private/auth
smtpd_sasl_type = dovecot
smtpd_sender_restrictions = check_sender_access mysql:/etc/postfix/
smtpd_tls_cert_file = /etc/postfix/smtpd.cert
smtpd_tls_key_file = /etc/postfix/smtpd.key
smtpd_tls_security_level = may
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtpd_use_tls = yes
transport_maps = proxy:mysql:/etc/postfix/
virtual_alias_domains =
virtual_alias_maps = proxy:mysql:/etc/postfix/, proxy:mysql:/etc/postfix/, hash:/var/lib/mailman/data/virtual-mailman
virtual_gid_maps = static:5000
virtual_mailbox_base = /var/vmail
virtual_mailbox_domains = proxy:mysql:/etc/postfix/
virtual_mailbox_maps = proxy:mysql:/etc/postfix/
virtual_transport = dovecot
virtual_uid_maps = static:5000
Postmap query:
root@abda:/home/sysadmin# postmap -q proxy:mysql:/etc/postfix/
I'm running the latest stable version of ISPConfig and using the latest Perfect Server 3
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