thank you again Wietse. It's an honor to hear from the creator of postfix. This 
problem is now solved and I have learned a lesson about how to deal with this 
situation.

best!
tim

----- Original Message -----
From: "Tim Dunphy" <bluethu...@jokefire.com>
To: "Postfix users" <postfix-users@postfix.org>
Sent: Friday, November 18, 2011 10:26:24 AM
Subject: Re: mail defered on local network

Thank you Wietse,

 I appreciate your reply. Here's what I've found.
 
 From the problem host:

 [monitor03:myuser:~]$telnet alt4.gmail-smtp-in.l.google.com
Trying 74.125.39.26...
telnet: connect to address 74.125.39.26: Connection refused

 From the EC2 instance:

 [root@puppet ~]# telnet alt4.gmail-smtp-in.l.google.com 25
Trying 74.125.43.27...
Connected to alt4.gmail-smtp-in.l.google.com (74.125.43.27).
Escape character is '^]'.
220 mx.google.com ESMTP uh9si876412bkb.108
HELO puppet
250 mx.google.com at your service


 So I think I understand your point that this is not a matter of correcting a 
configuration error in postfix, but rather it seems that port 25 outbound is 
blocked on this network.


Thanks,
TIm




----- Original Message -----
From: "Wietse Venema" <wie...@porcupine.org>
To: "Postfix users" <postfix-users@postfix.org>
Sent: Friday, November 18, 2011 8:33:29 AM
Subject: Re: mail defered on local network

Tim Dunphy:
>   [monitor03:root:/etc/postfix]#telnet localhost 25
...
>   [root@cloud postfix]# telnet localhost 25

The problem is with DELIVERING mail not receiving it.

Therefore, try to telnet to the DESTINATION, not the Postfix MTA.

        Wietse

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