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
Solved

Exchange 2016 : 451.4.4.0 dns query failed exchange

Posted on 2016-11-06
10
63 Views
Last Modified: 2016-11-06
I'm getting 451.4.4.0 dns query failed. The error was: DNS query failed with error ServerFailure

Nothing has changed from my server which is strange. i use a smart host to route my email.

please help .
0
Comment
Question by:Jack 50
  • 5
  • 5
10 Comments
 
LVL 14

Expert Comment

by:Jason Crawford
ID: 41876483
Where are you seeing this error?  In an NDR?  Try sending directly to the internet and bypass the smarthost for now.
0
 

Author Comment

by:Jack 50
ID: 41876485
in the exchange message queue. I'm not great with exchange
0
 
LVL 14

Accepted Solution

by:
Jason Crawford earned 500 total points
ID: 41876487
Gotcha ok no problem.  Here is a Technet article explaining how to configure a Send Connector to route directly to the internet.  You can either create a new SC and disable the current one or just modify the settings of the current Send Connector:

https://technet.microsoft.com/en-us/library/jj657457(v=exchg.160).aspx
0
VMware Disaster Recovery and Data Protection

In this expert guide, you’ll learn about the components of a Modern Data Center. You will use cases for the value-added capabilities of Veeam®, including combining backup and replication for VMware disaster recovery and using replication for data center migration.

 

Author Comment

by:Jack 50
ID: 41876490
I kind of want to use the smarthost as i have been though
0
 
LVL 14

Expert Comment

by:Jason Crawford
ID: 41876493
As a test then to isolate the issue.
0
 

Author Comment

by:Jack 50
ID: 41876496
worked fine...

But I have 50 email in the queue with the smarthost still.
0
 

Author Comment

by:Jack 50
ID: 41876501
oh... they just all started sending..  should i be using a smarthost? what does it help with ?
0
 
LVL 14

Expert Comment

by:Jason Crawford
ID: 41876504
You don't need a smarthost but they do have a benefit:

https://en.wikipedia.org/wiki/Smart_host

Ultimately you'll want to verify the outbound smarthost name from the vendor because it appears they aren't accepting email from your Exchange server.
0
 

Author Comment

by:Jack 50
ID: 41876505
Legend.. thanks for your help.
0
 
LVL 14

Expert Comment

by:Jason Crawford
ID: 41876507
Glad I could help.  Take care :)
0

Featured Post

NAS Cloud Backup Strategies

This article explains backup scenarios when using network storage. We review the so-called “3-2-1 strategy” and summarize the methods you can use to send NAS data to the cloud

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.
A list of top three free exchange EDB viewers that helps the user to extract a mailbox from an unmounted .edb file and get a clear preview of all emails & other items with just a single click on mailboxes.
In this video we show how to create a Resource Mailbox in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: Navigate to the Recipients >> Resources tab.: "Recipients" is our default selection …
In this video we show how to create an Accepted Domain in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: First we need to log into the Exchange Admin Center. Navigate to the Mail Flow >> Ac…

791 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