Solved

451 5.7.3 Cannot achieve Exchange Server authentication - Exchange 2010 to Exchange 2007

Posted on 2010-09-03
2
1,607 Views
Last Modified: 2012-06-27
I have 2 Exchange client access/hub transport/mailbox servers. One is 2007 and one is 2010 (new setup). Both are operating fine. I have only one send connector. The Exchange 2007 sends all outbound mail and receives all inbound mail (for the exchange 2007) mailboxes but fails to deliver (and collects in queue) all mail going to Exchange 2010 server.
The Exchange 2010 cannot send or receive any mail and on the queue I saw the error "451 5.7.3 Cannot achieve Exchange Server authentication"

Thanks.
0
Comment
Question by:paralves
2 Comments
 
LVL 16

Accepted Solution

by:
uescomp earned 500 total points
ID: 33598474
Check your send and receive connectors on both servers and make sure that Exchange server authentication is selected.  I ran into the same problem with a new Exchange 2010 deployment.
0
 

Author Comment

by:paralves
ID: 33610424
Thanks uescomp. I check the Exchange server authentication on the receive connectors of both servers and now all are operanting fine.

Thanksss.
0

Featured Post

PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

Question has a verified solution.

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

Suggested Solutions

We are happy to announce a brand new addition to our line of acclaimed email signature management products – CodeTwo Email Signatures for Office 365.
Following basic email etiquette rules will help you write a professional email and achieve a good, lasting impression with your contacts.
The basic steps you have just learned will be implemented in this video. The basic steps are shown to configure an Exchange DAG in a live working Exchange Server Environment and manage the same (Exchange Server 2010 Software is used in a Windows Ser…
how to add IIS SMTP to handle application/Scanner relays into office 365.

863 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

Need Help in Real-Time?

Connect with top rated Experts

28 Experts available now in Live!

Get 1:1 Help Now