Solved

Exchange 2010 DNSConnectorDelivery Retry

Posted on 2014-11-18
14
258 Views
Last Modified: 2014-11-20
We have an Exchange 2010 server that all of a sudden started going into a Retry status on DNSConnectorDelivery. I can stop and restart the Transport service and it will send mail out for a few minutes and then stop again. Inbound email works fine as does internal email. only outbound appears to be affected.
0
Comment
Question by:350ztn
  • 8
  • 6
14 Comments
 
LVL 8

Expert Comment

by:tshearon
ID: 40450790
Do you send mail to the internet using MX records or through a smart host?
0
 

Author Comment

by:350ztn
ID: 40450826
sending through MX.

Also another bit of info I just discovered. I did an Nslookup on the server and it does not resolve google.com. it is using IPv6. so I disabled the IPv6 and ran the nslookup and it was successful.
I restarted the Transport service and it would not start with IPV6 disabled?
0
 
LVL 8

Expert Comment

by:tshearon
ID: 40450851
Don't disable it. You need it for the service to start. Just simply unselect it on the properties of the network adapter you are using.
0
 

Author Comment

by:350ztn
ID: 40450861
Sorry- that is what I meant. I unchecked it on the adapter properties. but transport service will not start with it unchecked.
0
 
LVL 8

Expert Comment

by:tshearon
ID: 40450869
hrmm. You can disable it in the registry and it should still start. Try this:

http://busbar.blogspot.com/2010/05/unable-to-moun-exchange-2010-db.html
0
 

Author Comment

by:350ztn
ID: 40450882
I did this...

Open Registry Editor.
Locate the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters
In the details pane, click New, and then click DWORD (32-bit) Value.
Type DisabledComponents, and then press ENTER.
Double-click DisabledComponents, and then type 0xffffffff in Hexadecimal or 4294967295 in Decimal.

Transport Starts, but nslookup is still using IPv6 and not resolving.
0
 
LVL 8

Accepted Solution

by:
tshearon earned 500 total points
ID: 40450979
Sorry, wrong link. Here is the link to what I should have sent.

http://technet.microsoft.com/en-us/network/cc987595.aspx

What happens if you uncheck it now? Does it work? Have you restarted the server after making registry change?
0
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.

 

Author Comment

by:350ztn
ID: 40450999
I did not restart server or uncheck it... I will try both and report back
0
 

Author Comment

by:350ztn
ID: 40451079
removed the check mark from IPV6 and rebooted. mail is currently sending after the reboot. After the reboot I stopped and started transport and it was successful. nslookup resolves correctly now.

I will give it 30 minutes and test email sending to see if it still works.
0
 
LVL 8

Expert Comment

by:tshearon
ID: 40451080
Glad to hear. Let me know how it goes.
0
 

Author Comment

by:350ztn
ID: 40451371
still not working.
0
 

Author Comment

by:350ztn
ID: 40451420
I checked dns and flushed the cache and the send connectors. all looked. ipconfig flushdns and registerdns.
that started sending mail. i did not stop and start transport service. hoping this fixed it
0
 
LVL 8

Expert Comment

by:tshearon
ID: 40452023
Flushing and registering DNS should have no effect since after restarting there were no changes made that would affect DNS config or cache.
0
 

Author Comment

by:350ztn
ID: 40454764
It's still working. I can only assume the DNS flush or register did it. Thank you for the assistance.
0

Featured Post

Zoho SalesIQ

Hassle-free live chat software re-imagined for business growth. 2 users, always free.

Question has a verified solution.

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

Disabling the Directory Sync Service Account in Office 365 will stop directory synchronization from working.
ADCs have gained traction within the last decade, largely due to increased demand for legacy load balancing appliances to handle more advanced application delivery requirements and improve application performance.
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 …
This video demonstrates how to sync Microsoft Exchange Public Folders with smartphones using CodeTwo Exchange Sync and Exchange ActiveSync. To learn more about CodeTwo Exchange Sync and download the free trial, go to: http://www.codetwo.com/excha…

920 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

14 Experts available now in Live!

Get 1:1 Help Now