First, I would like to thank those of you that have replied to this thread. I
appreciate the feedback so far. I need to apologize for my typo...the email
gateway/firewall is Fortimail as you figured out.
I have implemented the suggestions that you have suggested so far:
1. Changed mynetworks to include fortimail.firewall.ip.address/32
2. Determined the Fortimail firewall is running in gateway mode
3. Researched the Fortimail knowledge base for help with postfix setup;
nothing found
4. Examined /var/log/maillog and found no bounced or received messages from
non-local addresses
To better explain what we are doing, our postfix server is running CentOS
6.3. We are setting it up to run phplist mailling list manager. phplist has
a bounce management feature that requires a pop3 account and a local user
inbox to collect bounced messages. Herein lies the problem...since no
messages are being received by postfix, the bounce management feature of
phplist does not work. We are trying to manage a mailling list of around
12,000 students so bounce management is important.
Our postfix server is the final destination for inbound mail. All inbound
mail has to be relayed from the Fortimail firewall.
Outbound from the postfix server is working fine.
Inbound mail is being blocked apparently by our postfix server. Here is a
sample of the warning message being sent by postmaster at our postfix
server:
Warning: could not send message for past 1 hour
postmaster <postmas...@bps.gvltec.edu>
**********************************************
** THIS IS A WARNING MESSAGE ONLY **
** YOU DO NOT NEED TO RESEND YOUR MESSAGE **
**********************************************
The original message was received at Fri, 12 Oct 2012 08:57:28 -0400
from:
<beau.sand...@gvltec.edu>
----- Transcript of session follows -----
<listboun...@bps.gvltec.edu>... Deferred: Connection timed out with
bps.gvltec.edu.
Warning: message still undelivered after 1 hour
Will keep trying until message is 2 days old
I have researched the string "Deferred: Connection timed out" to see if I
can figure out what is not working, but have not yet located a solution.
Our Fortimail administrator has been helpful but tells me that he is NOT
receiving any errors and he is forwarding/relaying all inbound email to our
postfix server.
I hope this better explains where we are at finding a solution. Once again,
thank you so much for sharing your experience and expertise with us.
-Beau
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