Can't Send to Sprint Messaging Users..

11 msg	Reject unknown Sender address
10 msg	Postfix and archiving
5 msg	-o content_filter overrides main.cf ?
1 msg	Postfix 2.4.3 and 2.3.11 available
8 msg	SASL authentication via dovecot?
2 msg	postfix/sasl: sql_select option missing - wtf?
3 msg	max connection rate/count/limit issues.
1 msg	requeue mails
6 msg	nothing in maillog
9 msg	local and remote storage for same user
7 msg	Rejecting Invaliud Users - Useful Resource poin...
4 msg	Distributing map files
5 msg	relay_recipient_maps for multiple destinations
13 msg	auto-responders with postfix
6 msg	Mydestination with virtual domains
6 msg	Splitting smtpd_proxy_filter in smtpd_recipient...

Can't Send to Sprint Messaging Users..
\ LB (30 May 2007)
. \ Brett Dikeman (30 May 2007)
. . \ LB (30 May 2007)
. . \ Brett Dikeman (30 May 2007)
. . . \ LB (30 May 2007)
. . . . \ LB (31 May 2007)
. . . . . \ John Peach (31 May 2007)
. . . . . . \ LB (31 May 2007)
. . . . . . \ LB (31 May 2007)
. . . . . . . \ LB (1 Jun 2007)

1 msg	MAAWG meeting anyone?
2 msg	basic postfix 2.4.1 configuration for a simple ...
5 msg	Strange persistant 'timeout after DATA' from ma...

Subject:	Can't Send to Sprint Messaging Users..
Group:	Postfix-users
From:	LB
Date:	30 May 2007

Greets to the list!

I have recently migrated to Postfix from Qmail and I must say that I love
Postfix!

However, since upgrading, for some strange reason I can no longer send mail
to Sprint users.

The error reads:

#################

May 30 09:03:55 MARTINI postfix/smtpd[7711]: connect from
162.sub-75-194-211.myvzw.com[75.194.211.162]

May 30 09:03:57 MARTINI postfix/smtpd[7711]: NOQUEUE:
client=162.sub-75-194-211.myvzw.com[75.194.211.162]

May 30 09:03:59 MARTINI postfix/smtpd[2490]: connect from localhost.
mydomain.net[127.0.0.1] May 30 09:03:59 MARTINI postfix/smtpd[2490]:
4DF93E776A: client=162.sub-75-194-211.myvzw.com[75.194.211.162]

May 30 09:03:59 MARTINI postfix/cleanup[32152]: 4DF93E776A:
message-id=<20070530130359.4DF93E776A@martini.
<mailto:20070530130359.4DF93E776A> mydomain.net>
May 30 09:03:59 MARTINI postfix/smtpd[2490]: disconnect from
localhost.mydomain.net[127.0.0.1] May 30 09:03:59 MARTINI
postfix/qmgr[3878]: 4DF93E776A: from=<me>, size=1121, nrcpt=1
(queue active) May 30 09:03:59 MARTINI postfix/smtp[10216]: 4DF93E776A:
to=<6465849524>,
relay=mx.messaging.sprintpcs.com[68.28.3.22]:25, delay=0.16,
delays=0.03/0/0.12/0, dsn=4.4.2, status=deferred (lost connection with
mx.messaging.sprintpcs.com[68.28.3.22] while receiving the initial server
greeting) May 30 09:03:59 MARTINI postfix/smtpd[7711]: disconnect from
162.sub-75-194-211.myvzw.com[75.194.211.162]

####################

These messages don't seem to bounce, or give me any sign of failure from the
end user perspective. Any ideas what I should look at to solve this issue?

I should also add that I have moved to a different ISP using DDNS. My
previous ISP was a static IP which I owned for about a year with the IP. Not
sure if that makes a difference. Unless the Sprint server is banning my
server due to it being in the "Dynamic" range.

Thanks!

LB