From: Stephen (sdw2shineonline.co.nz)
Date: Fri Aug 26 2005 - 02:08:55 CDT

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Hi Damien,

>
> Hi Stephen,
>
> Looks strange, perhaps it is checking the the EHLO of your proxy or
> from
> your original mail server ?
>
I'm wondering if it is something to do with the mail being relayed by
virtue of it going through the proxy.

> It probably would be a good idea to postconf -n for both your
> mailserver
> and your mail proxy, in case there is a configuration parameter that
> could be causing the problem.
postconf output included below
>
> What happens when you manually send from the mailserver (ie, don't go
> through the proxy) ?
I can't reasonably do this as the mail server is behind the firewall,
proxy etc, plus it is linked up to the internal LDAP server.
Amavisd-new is just used for virus checking on this server..
>
> Have you tried to send mail using the sendmail binary on both the mail
> server and the proxy server, to this "restrictive" host ?

Same thing.

Thanks for helping
Stephen

>
> Damien
>
proxy postconf -n output

alias_database = hash:/etc/postfix/aliases
alias_maps = hash:/etc/postfix/aliases
bounce_queue_lifetime = 2d
canonical_maps = hash:/etc/postfix/canonical
command_directory = /usr/sbin
config_directory = /etc/postfix
content_filter = smtp-amavis:[localhost]:10024
daemon_directory = /usr/lib/postfix
debug_peer_level = 2
default_destination_concurrency_limit = 2
disable_vrfy_command = yes
header_checks = regexp:/etc/postfix/header_checks
home_mailbox = Maildir/
html_directory = no
local_destination_concurrency_limit = 2
mail_owner = postfix
mail_spool_directory = /var/spool/mail
mailq_path = /usr/bin/mailq
manpage_directory = /usr/share/man
maximal_queue_lifetime = 10d
mydestination = $myhostname
mydomain = ourserver.co.nz
myhostname = proxy.ourserver.co.nz
mynetworks = 192.168.0.3, 127.0.0.0/8
myorigin = $mydomain
newaliases_path = /usr/bin/newaliases
queue_directory = /var/spool/postfix
readme_directory = /usr/share/doc/postfix-2.1.4/readme
relay_domains = ourserver.co.nz, 192.168.0.3
sample_directory = /etc/postfix
sendmail_path = /usr/sbin/sendmail
setgid_group = postdrop
smtpd_banner = $myhostname ESMTP $mail_name
smtpd_data_restrictions = reject_unauth_pipelining
smtpd_delay_reject = yes
smtpd_error_sleep_time = 0
smtpd_hard_error_limit = 10
smtpd_helo_required = yes
smtpd_helo_restrictions = reject_invalid_hostname
reject_unauth_pipelining reject_non_fqdn_hostname
smtpd_recipient_restrictions = reject_unauth_pipelining
reject_non_fqdn_recipient reject_unknown_recipient_domain
reject_unverified_recipient permit_mynetworks
reject_unauth_destination reject_rbl_client
cbl.abuseat.org reject_rbl_client sbl-xbl.spamhaus.org
reject_rbl_client list.dsbl.org reject_rbl_client
relays.ordb.org check_policy_service inet:127.0.0.1:10030
smtpd_sender_restrictions = reject_invalid_hostname,
reject_non_fqdn_hostname reject_non_fqdn_sender
reject_unknown_sender_domain reject_unauth_pipelining
hash:/etc/postfix/access
smtpd_timeout = 20s
soft_bounce = no
transport_maps = hash:/etc/postfix/transport
unknown_local_recipient_reject_code = 550
unverified_recipient_reject_code = 550

000000000000000000000000000000000

internal mail server postconf -n output

alias_database = hash:/etc/postfix/aliases
alias_maps = hash:/etc/postfix/aliases
body_checks = regexp:/etc/postfix/body_checks
canonical_maps = hash:/etc/postfix/canonical
command_directory = /usr/sbin
config_directory = /etc/postfix
content_filter = smtp-amavis:[127.0.0.1]:10024
daemon_directory = /usr/libexec/postfix
debug_peer_level = 2
header_checks = regexp:/etc/postfix/header_checks
home_mailbox = Maildir/
mail_owner = postfix
mailbox_command = /usr/bin/maildrop
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
maximal_queue_lifetime = 5d
message_size_limit = 20480000
mydestination = $myhostname localhost.$mydomain $mydomain mail.
$mydomain
mydomain = ourserver.co.nz
myhostname = alpha.ourserver.co.nz
mynetworks = 192.168.0.0/24, 192.168.1.0/24, 192.168.2.0/24,
192.168.3.0/24, 192.168.4.0/24, 192.168.9.0/24, 127.0.0.0/8
myorigin = $mydomain
newaliases_path = /usr/bin/newaliases.postfix
queue_directory = /var/spool/postfix
readme_directory = /etc/postfix/README_FILES
relayhost = proxy.ourserver.co.nz
sample_directory = /etc/postfix/samples
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
smtpd_client_restrictions =
smtpd_helo_restrictions = reject_invalid_hostname,
reject_unauth_pipelining, reject_non_fqdn_hostname
smtpd_recipient_restrictions = permit_mynetworks
reject_unauth_destination reject_unknown_recipient_domain permit
smtpd_sender_restrictions = reject_invalid_hostname,
reject_non_fqdn_hostname, reject_unauth_pipelining
soft_bounce = no
transport_maps = hash:/etc/postfix/transport
unknown_local_recipient_reject_code = 550

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