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How to setup a Postfix server to forward to Exchange server

I have already asked this but I still cannot get it to work. What Im trying to do is forward alerts from my nagios server to my exchange server. The Nagios server has postfix installed and configured but I keep getting this message when sending

<cjameson@exchange.domainserver.net>: host 192.168.1.212[192.168.1.212] said:
550 5.7.1 Unable to relay (in reply to RCPT TO command)

I followed these steps
http://technet.microsoft.com/en-us/library/bb232021(EXCHG.80).aspx

But I still cannot get a relay setup correctly for some reason. Can anyone give me a headsup as to what I may be doing wrong?

jlar310

How is postfix configured? Please post output of "postconf -n"

Have you tried setting postfix to behave as a simple client?

http://www.postfix.org/STANDARD_CONFIGURATION_README.html#null_client

cjameson74

ASKER

No I havent tried setting it as a client, but here are the results of the conf file. I have tried to telnet to the exchange server and send a test email msg and that went thru....its only when im using mailx it gets bounced

alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
biff = no
config_directory = /etc/postfix
default_transport = error
local_recipient_maps =
mailbox_size_limit = 0
mydestination = Monitor.DomainServer.net, localhost.DomainServer.net, localhost
myhostname = Monitor.DomainServer.net
mynetworks = 127.0.0.0/8 192.168.1.212/24
myorigin = domainserver.net
readme_directory = no
recipient_delimiter = +
relay_domains = domainserver.net
relay_transport = error
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtpd_use_tls = no
transport_maps = hash:/etc/postfix/transport
root@Monitor:~#

vnicolae

in your transport file, make sure you the the following line:

exchange.domainserver.net: smtp:[ip address of your exchange server]

Jon Brelie

Also, run the following from your postfix server and post the results (replace italicized text with valid info):
---------------------------------------------
telnet YourExchangeServer 25
helo PostfixServer
mail from: root@PostFixServer
rcpt to: YourExternal@EmailAddress.com (like gmail or yahoo)
data
From: Root
To: You
Subject: Testing Relay
message content
.
---------------------------------------------

Make sure you don't miss that last line. (single period)

If you receive the message at your external address, then relaying is working fine and it is a postfix issue. Otherwise it should give you an error.

Jon Brelie

Oh... typing too slow.

Here's a thought... do you have an MX record setup for your domain internally? If postfix is trying to use your public MX, that might be the problem.

cjameson74

ASKER

I have the transport file configured like that already....
Telnet is working just fine
I received the email so it must be something else in postfix config

cjameson74

ASKER

No the MX record is at our hosted site.

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Jon Brelie

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cjameson74

ASKER

Just for reference
I did get a reply here on exchange

root@Monitor:/etc/postfix# telnet exchange.domainserver.net 25
Trying 192.168.1.212...
Connected to exchange.domainserver.net.
Escape character is '^]'.
220 exchange.DomainServer.net Microsoft ESMTP MAIL Service ready at Tue, 14 Sep 2010 14:24:55 -0500
helo
250 exchange.DomainServer.net Hello [192.168.1.100]
mail from:root@monitor.domainserver.net
250 2.1.0 Sender OK
rcpt to:cjameson@americanriskins.com
250 2.1.5 Recipient OK
data
354 Start mail input; end with <CRLF>.<CRLF>
Testing relay
.
250 2.6.0 <a9c76d0e-9ef5-4f64-9e19-b2a94e1eebeb@exchange.DomainServer.net> Queued mail for delivery

ddiazp

You need the following (2) entries on your transport file:

.domainserver.net: smtp:[ip address of your exchange server]
domainserver.net: smtp:[ip address of your exchange server]

dont forget to postmap that transport file, restart postfix and try again.

ddiazp

It's been 4 days, how did it go?