Cannot send e-mail to, or receive e-mail from one particular business contact

I have a business contact to whom I cannot successfully send an e-mail.  All e-mails are returned after several days, with a message such as that quoted below. (I have changed our e-mail addresss).  Conversly, she cannot e-mail me.  

I have never had this problem with anyone else.  Our e-mails just won't go through to each other.  These are legitimage business e-mails, between a company  and one of its sales reps, not likely to be mistakenly identified as spam.  What is the cause for this anomolous behaviour?  What is the solution?

The destination host is ___@mac.com.  

Quote:
A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

 1234@mac.com
   SMTP error from remote mail server after initial connection:
   host smtp-mx7.mac.com [17.250.244.62]: 452 try later:
   retry timeout exceeded

------ This is a copy of the message, including all the headers. ------

Return-path: <6789@dolcemia.com>
Received: from [64.142.120.204] (helo=Saturn)
    by cpanel56.gzo.com with esmtpa (Exim 4.63)
    (envelope-from <6789@dolcemia.com>)
    id 1HRyG0-0006NC-NE; Thu, 15 Mar 2007 17:17:12 -0500
Date: Thu, 15 Mar 2007 15:17:09 -0700
From: Alex Mountjoy <6789@dolcemia.com>
Subject: Links to jpegs
To: Mary Erbstoesser <1234@frontiernet.net>
cc: T-Luxe <1234@mac.com>
Message-ID: <Q0dWU05BNyQ2MT5JPlFZMTcxNTMxMTA5@Saturn>
Mime-Version: 1.0
Organization: Dolce Mia Designs
X-Mailer: GoldMine [6.70.50123]
Content-Type: text/plain
Content-Transfer-Encoding: quoted-printable
idolcemiaAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

hitman4leaseCommented:
Idocemia,

It looks like you could be getting blocked from this person's spam filter or some type of service because of your domain. This is what came up when I did a dns report on your domain. http://www.dnsstuff.com/tools/dnsreport.ch?domain=dolcemia.com

Take a look at that and see if you can clean some of that up, in the mean time use a alternative email.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Email Clients

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.