Cannot send email to @census.gov using SBS 2008

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I have an issue where I cannot send any email to @census.gov domains from my new SBS 2008 with Exchange 2007. @msn and @yahoo.com work fine. Ideas? Is .gov blocking anything?

Headers:
Microsoft Mail Internet Headers Version 2.0
 
Received: from rs40mail.na.bestbuy.com ([167.209.1.118]) by dsp66mail.na.bestbuy.com with Microsoft SMTPSVC(6.0.3790.3959);
 
                 Thu, 22 Oct 2009 10:09:05 -0500
 
Received: from dsp4xmail.bestbuy.com ([198.22.123.169]) by rs40mail.na.bestbuy.com with Microsoft SMTPSVC(6.0.3790.3959);
 
                 Thu, 22 Oct 2009 10:09:04 -0500
 
X-IronPort-Anti-Spam-Filtered: true
 
X-IronPort-Anti-Spam-Result: AicFAMER4EqXxD4p/2dsb2JhbACBMx9ZKtk9hD8E
 
X-IronPort-AV: E=Sophos;i="4.44,605,1249275600"; 
 
   d="scan'208,217";a="431481341"
 
Received: from static-IP.balt.east.verizon.net (HELO remote.externaldomain.com) ([IP])
 
  by dsp4xmail.bestbuy.com with ESMTP; 22 Oct 2009 10:09:04 -0500
 
Received: from SERVER01.domain.local ([fe80::5c1e:a75a:6c92:a739]) by
 
 SERVER01.domain.local ([fe80::5c1e:a75a:6c92:a739%10]) with mapi; Thu, 22
 
 Oct 2009 11:09:03 -0400
 
From: user <user@externaldomain.com>
 
To: "user@domain.com" <user@domain.com>
 
Date: Thu, 22 Oct 2009 11:09:02 -0400
 
Subject: Test
 
Thread-Topic: Test
 
Thread-Index: AQHKUymXgo89Tb9lH0OJ0bsDSk++uw==
 
Message-ID: <A3FD733AC16F3941B5F5777971739136217F7385@SERVER01.sheilalee.local>
 
Accept-Language: en-US
 
Content-Language: en-US
 
X-MS-Has-Attach:
 
X-MS-TNEF-Correlator:
 
acceptlanguage: en-US
 
Content-Type: multipart/alternative;
 
                boundary="_000_A3FD733AC16F3941B5F5777971739136217F7385SERVER01sheilal_"
 
MIME-Version: 1.0
 
Return-Path: user@externaldomain.com
 
X-OriginalArrivalTime: 22 Oct 2009 15:09:04.0724 (UTC) FILETIME=[984A2140:01CA5329]
 
 
 
--_000_A3FD733AC16F3941B5F5777971739136217F7385SERVER01sheilal_
 
Content-Type: text/plain; charset="iso-8859-1"
 
Content-Transfer-Encoding: quoted-printable
 
 
 
--_000_A3FD733AC16F3941B5F5777971739136217F7385SERVER01sheilal_
 
Content-Type: text/html; charset="iso-8859-1"
 
Content-Transfer-Encoding: quoted-printable
 
 
 
 
 
--_000_A3FD733AC16F3941B5F5777971739136217F7385SERVER01sheilal_--

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Commented:
Launch nslookup on mail server and check resolving mx-record for this domain. May be your Exchange can not find it.

Author

Commented:
The emails sit in the SMTP Que till they time out.

My server can see their email servers:
See attached
nslookup.jpg

Author

Commented:
Would it be that I need to have a secure SMTP? Maybe thats why they are blocking it?
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Commented:
Promt this in command line:
telnet mailin1e.census.gov 25
you will be prompted (if evr. is ok):
220 mailin1e.census.gov ESMTP Sendmail 8.13.8/8.13.8/rx-v647; Thu, 22 Oct 2009 1
4:43:36 -0400

MAIL FROM: (type yor fro email)
RCPT TO: (target address)
DATA
(type test message)
. (type dot and press enter)

if evr. pass - chek exchange queue (mailsubmittion service, example)

Commented:
Check for the MSExchangeMailSubmission service - it must be running.
You may use "Tools" for troubleshoting problem with emails, from Exhcange management console.

Author

Commented:
So it looks like I need to setup a Recursive DNS with Verizon?
rdns.JPG

Commented:
census.gor mail server cannot find the PTR record in revers DNS zone (for your external IP) i guess. You have to ask your ISP to register in DNS that one. It take some hours or days.
I had such problem once
Co-Owner
Top Expert 2011
Commented:
The problems with your domain are:
  • You have an IP Address for your MX record and not a Fully Qualified Domain Name (FQDN) e.g., mail.yourdomain.com.  Once you have corrected this - then your Reverse DNS entry can be checked to see if it is correct.  Currently the IP associated with your primary MX record returns a balt.east.verizon.net address - this should be something like mail.yourdomain.com.
  • You have two MX records and the initial one also has a priority of Zero - which can also cause some problems with mail-flow, so please amend this to 5 as your other MX record is 10.
  • You don't have an SPF record setup - which some servers can insist that you have.  Please visit http://old.openspf.org/wizard.html  to work out what to put and then amend your domains DNS records to add a TXT record with the output from the openspf site as the detail.

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