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
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?
