51. 4.4.0 Primary target IP address responded with: "451 5.7.3 Cannot achieve Exchange Server Authentication". Attemped failover host, but not succeed.

Posted on 2011-03-05
Last Modified: 2012-05-11
could someone help me please?
I Have Exchange 2003 in organization at Active Directory site A. Later we installed Exchange 2010 (HUB+CAS+Mailbox) in Active Directory Site B. They were communicated via Routing Group Connector.
Now we have new Exchange 2010 with CAS, HUB and mailbox roles installed in site A. I created also RG connector between 2003 and 2010 in this site A.
All e-mails from internet goes to Exchange 2003 and then to 2010 at the same site= site A.

I am not able send e-mail (from internal or external) to Exchnage 2010 in site B. Server in AD site B is able to SEND e-mail. The e-mails stucks in the mail queue on the Ex.2010 server at site A and I got error below:

4.4.0 Primary target IP address responded with: "451 5.7.3 Cannot achieve Exchange Server Authentication". Attemped failover host, but not succeed.

I have checked connector (receive), reboot transport service after configuration, but no success. I also checked if I have checke Windows Auth. Mechanism at Ex.2003... Telnet to port 25 from all exchange servers o each other works.

Could some on give me and advice?

Thanks Peter
Question by:Kolouschek
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2

Accepted Solution

IamTheMorsa earned 125 total points
ID: 35043306

Author Comment

ID: 35043417
thanks for info, but before you wrote me I did check of my Receive connectors-I disable all the rest and configure only defaut connectores. After that seems that mail flow works, but I will do few test later and we will see if it is really alright... Anyway thank you for advice.

Author Closing Comment

ID: 35045955
If you have this kind of problem you have to ALWAYS check your receive connectors if they are configured well.

Featured Post

Office 365 Training for IT Pros

Learn how to provision tenants, synchronize on-premise Active Directory, implement Single Sign-On, customize Office deployment, and protect your organization with eDiscovery and DLP policies.  Only from Platform Scholar.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

MS Outlook is a world-class email client application that is mainly used for e-communication globally.  In this article, we will discuss the basic idea about MS Outlook, its advanced features, and types of MS Outlook File formats.
Find out what you should include to make the best professional email signature for your organization.
The video tutorial explains the basics of the Exchange server Database Availability groups. The components of this video include: 1. Automatic Failover 2. Failover Clustering 3. Active Manager
Exchange organizations may use the Journaling Agent of the Transport Service to archive messages going through Exchange. However, if the Transport Service is integrated with some email content management application (such as an antispam), the adminiā€¦

729 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question