HowtoForge Forums | HowtoForge - Linux Howtos and Tutorials - How to Setup Postfix to Work with Fortimail

I am attempting to configure a Postfix MTA in CentOS 6.3 for our school. The Postfix server has to send and receive email through a Fortimail firewall. Outgoing email is working fine. Email sent locally using the mail command to a local user on the CentOS/Postfix server works fine. However, all email coming in to the Fortimail firewall addressed to users on the Postfix server is NOT being accepted by Postfix. Inbound mail from Fortimail is being deferred and ultimately rejected by Postfix. It appears the email is being forwarded/relayed from the Fortimail firewall to the Postfix server. There are no errors on the Fortimail firewall.

Here is the main.cf file as it is currently configured:

Code:

queue_directory = /var/spool/postfix

command_directory = /usr/sbin

daemon_directory = /usr/libexec/postfix

data_directory = /var/lib/postfix

mail_owner = postfix

myhostname = bps.gvltec.edu

inet_interfaces = all

inet_protocols = all

mydestination = $myhostname, localhost.$mydomain, localhost

unknown_local_recipient_reject_code = 550

relayhost = [fortimail.ip.address.here]

relay_recipient_maps = hash:/etc/postfix/relay_recipients

alias_maps = hash:/etc/aliases

alias_database = hash:/etc/aliases

debug_peer_level = 2

debugger_command =

         PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin

         ddd $daemon_directory/$process_name $process_id & sleep 5

sendmail_path = /usr/sbin/sendmail.postfix

newaliases_path = /usr/bin/newaliases.postfix

mailq_path = /usr/bin/mailq.postfix

setgid_group = postdrop

html_directory = no

manpage_directory = /usr/share/man

sample_directory = /usr/share/doc/postfix-2.6.6/samples

readme_directory = /usr/share/doc/postfix-2.6.6/README_FILES

Please advise me on what I am missing. I have not been able to locate any posts from users with similar problems. I will be happy to answer questions if somewhere will help me correct this issue.

Thank you in advance for your help.

-Beau