Solved

Help! Emails are being delayed both internally and externally after adding new Exchange servers

Posted on 2013-06-11
2
538 Views
Last Modified: 2013-06-11
Hello,

This is an urgent issue... We currently have one Exchange 2010 server doing CAS, Hub, and MBX roles. We decided to integrate a new Exchange servers into our environment, without doing anything to the existing server. We created a CAS Array and assigned a SSL cert to the machines, created a MBX DAG with two more servers and load balanced the traffic via Zen. Suddenly everyone on the original Exchange server is getting "Delivery is delayed to these recipients or groups."

We've had these machines operational for over a week and just began doing the SSL cert addition, load balancing the past day, and autodiscover the past day. We used completely different certs and urls:

Original SSL: email.contoso.com
New SSL: mail.contoso.com

Original redirect: redirect.contoso.com
New redirect: redirect1.contoso.com
0
Comment
Question by:jmichaelpalermo4
[X]
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
2 Comments
 
LVL 3

Author Comment

by:jmichaelpalermo4
ID: 39240003
Getting an error on the CAS / Hub servers:

451 4.4.0 DNS query failed. The error was: SMTPSEND.DNS.NonExistentDomain
0
 
LVL 3

Accepted Solution

by:
jmichaelpalermo4 earned 0 total points
ID: 39240025
Found the issue - I had set an external DNS on the CAS/Hub servers to 8.8.8.8 - We needed to set both DNS to internal
0

Featured Post

Comparison of Amazon Drive, Google Drive, OneDrive

What is Best for Backup: Amazon Drive, Google Drive or MS OneDrive? In this free whitepaper we look at their performance, pricing, and platform availability to help you decide which cloud drive is right for your situation. Download and read the results of our testing for free!

Question has a verified solution.

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

Lotus Notes – formerly IBM Notes – is an email client application, while IBM Domino (earlier Lotus Domino) is an email server. The client possesses a set of features that are even more advanced as compared to that of Outlook. Likewise, IBM Domino is…
After hours on line I found a solution which pointed to the inherited Active Directory permissions . You have to give/allow permissions to the "Exchange trusted subsystem" for the user in the Active Directory...
In this video we show how to create an email address policy 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…
This video shows how to quickly and easily add an email signature for all users on Exchange 2016. The resulting signature is applied on a server level by Exchange Online. The email signature template has been downloaded from: www.mail-signatures…

728 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