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BeauSanders 11th October 2012 21:17

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 file as it is currently configured:


queue_directory = /var/spool/postfix
command_directory = /usr/sbin
daemon_directory = /usr/libexec/postfix
data_directory = /var/lib/postfix
mail_owner = postfix
myhostname =
inet_interfaces = all
inet_protocols = all
mydestination = $myhostname, localhost.$mydomain, localhost
unknown_local_recipient_reject_code = 550
relayhost = []
relay_recipient_maps = hash:/etc/postfix/relay_recipients
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
debug_peer_level = 2
debugger_command =
        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.


falko 12th October 2012 14:00

Are there any errors in your mail log (in the /var/log/ directory)?

Is port 25 open on your firewall? Is your firewall configured to forward port 25 to your Postfix server?

Did you check if maybe your ISP is blocking port 25?

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