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Error sending to particular domain, Verification failed

Hi Experts

I have been having some problems sending email to a particular domain and they are having problems sending to us. we have recently setup a new SBS with exchange 2010 but everything seems to test OK using testexchangeconnectivity.com and mxtoolbox.
we have setup a PTR record and a SPF record, amd made sure our DNS and MX records are setup correctly. this is the error we are getting



"theirmailserver.com rejected your message to the following e-mail addresses:
user@theirdomain.com (user@theirdomain.com)

theirmailserver.com gave this error:
Verification failed for <me@ourdomain.com>

The mail server could not deliver mail to me@ourdomain.com.

The account or domain may not exist, they may be blacklisted, or missing the proper dns entries. Sender verify failed
A problem occurred during the delivery of this message to this e-mail address. Try sending this message again. If the problem continues, please contact your helpdesk.


Diagnostic information for administrators:
Generating server: ourmailserver.local

user@theirdomain.com
theirmailserver.com #550-Verification failed for <me@ourdomain.com> 550-The mail server could not deliver mail to me@ourdomain.com. The account or domain may not exist, they may be blacklisted, or missing the proper dns entries. 550 Sender verify failed ##



The message they get when sending to us (and it appears to only be them that has this problem, everyone else so far is fine)



This message was created automatically by mail delivery software.

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:

  me@ourdomain.com
    The mail server could not deliver mail to me@ourdomain.com.  The account or domain may not exist, they may be blacklisted, or missing the proper dns entries.



From my research it looks like this is because our MX records point to an ip address instead of an A record but this is not the case

any ideas?
0
uE
Asked:
uE
1 Solution
 
-CPG-Commented:
sometimes intelligent message filtering on an exchange server will give you a delibrately missleading failure report when attempting to send something it considers spam.  If the receiving server has intelligent message filtering enabled check to see if you can turn it off and test with that feature disabled.  Just to see if that is the problem.
0
 
Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
If its an issue with one domain how can things be wrong at your end ? If thats so means all other domains are not checking or working properly ?

Can you send email to that recipient using OWA\Webmail ?
Are you able to send email to the recipient from Public email (Yahoo, Hotmail, etc) ?

- Rancy
0
 
Simon Butler (Sembee)ConsultantCommented:
Are you using remote.example.com for all hosts, as SBS likes? That should be remote.example.com for the MX record, and the PTR on the IP address. It will also be set as the FQDN on the Send Connector.

Sending email and receiving email are two different things. When they send email to you, what is the error?

Simon.
0
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uEAuthor Commented:
OK I'll look at intelligent message filtering

I manage both domains, new sbs box at one end and other client is on a hosted ISP who doesnt want to help (we aint paying much either) I need to know where the problem is. this is a new mail server too so need to be sure.

Its just these two who are having problems with each other.

we setup mobile.example.com first and have changed everything to mail.example.com for everything A, MX, PTR and SPF. MX is pointed at A and A is mail.example.com. I will double check the send connector
their error is below

This message was created automatically by mail delivery software.

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:

  me@ourdomain.com
    The mail server could not deliver mail to me@ourdomain.com.  The account or domain may not exist, they may be blacklisted, or missing the proper dns entries.

I will try your suggestions and get back to u
0
 
uEAuthor Commented:
we made a lot of changes to DNS to try to get this working today, now 12 hrs later I believe its working, waiting till morning b4 I can tell or not

I recon that I didnt wait for DNS to propagate fully before charging into troubleshooting.

I thank you for your prompt sugestions
0
 
Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
Your most welcome and as you say it was more of a DNS issue.

- Rancy
0
 
uEAuthor Commented:
Solved by being patient :)
0

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