getting email error when trying to reply to sent email

A user sent an email to an outside (the LAN) email address.  The outside person tried to respond but got a very strange message I have never seen:

The message below is what I received when I tried to email Tina.

-----Original Message-----
From: Mail Delivery System
[mailto:MAILER-DAEMON@asav14.manage.insightbb.com]
Sent: Saturday, November 04, 2006 10:59 PM
To: gwmoorman@insightbb.com
Subject: Delivery Status Notification (Failure)

The following message to <tantonacci@calvaryspringfield.org.> was undeliverable.
The reason for the problem:
5.1.2 - Bad destination host 'DNS Malformed Query Error looking up calvaryspringfield.org. (MX).'


The return address is valid.  Please advise.  thanks.
rstuemkeAsked:
Who is Participating?
 
SembeeConnect With a Mentor Commented:
There is a problem with that domain.

http://www.dnsreport.com/tools/dnsreport.ch?domain=calvaryspringfield.org

Something is interfering with the email connection and stopping anything from connecting.

Simon.
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rstuemkeAuthor Commented:
I have passed this onto our ISP for review.  Thanks.  More later.
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rstuemkeAuthor Commented:
Appears now to be a problem with the sender's ISP.  Thanks.
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