On Fri, May 13, 2011 at 01:12:18PM -0400, jason hirsh wrote:

>> The recipient server did not accept our requests to connect. Learn more 
>> athttp://mail.google.com/support/bin/answer.py?answer=7720
>> [mail.kasdivi.com. (5): Connection timed out]

If Google's TCP connections time out, naturally your Postfix server will
have no record of the connection attempt, and your Postfix configuration
plays no role in the problem. This is a transport or network layer issue,
and nothing at the application level will fix it.

For what it's worth, I have no issues connecting:

     Connected to mail.kasdivi.com[209.160.65.133]:25
     < 220 tuna.theoceanwindow-bv.com
     > EHLO amnesiac.example.com
     < 250-tuna.theoceanwindow-bv.com
     < 250-PIPELINING
     < 250-SIZE 10240000
     < 250-ETRN
     < 250-STARTTLS
     < 250-AUTH PLAIN LOGIN
     < 250-ENHANCEDSTATUSCODES
     < 250-8BITMIME
     < 250 DSN
     > STARTTLS
     < 220 2.0.0 Ready to start TLS
     Untrusted TLS connection established to 
mail.kasdivi.com[209.160.65.133]:25: TLSv1 with cipher DHE-RSA-AES256-SHA 
(256/256 bits)
     > EHLO amnesiac.example.com
     < 250-tuna.theoceanwindow-bv.com
     < 250-PIPELINING
     < 250-SIZE 10240000
     < 250-ETRN
     < 250-AUTH PLAIN LOGIN
     < 250-ENHANCEDSTATUSCODES
     < 250-8BITMIME
     < 250 DSN

Perhaps your server's connection smtpd(8) process limit is exhausted
from time to time, but Google's email should get through eventually,
unless there is a systemic network level issue.

-- 
        Viktor.

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