We help IT Professionals succeed at work.
Get Started

NDR's not being sent to external customers

Last Modified: 2012-05-10
Hi All,

We are having an issue at work whereby each time a message is sent from any external source (the domain can be any) to an invalid address on our domain, for example, an old email or a miss-spelling, an NDR is being created but instead of being sent to the sender, it is sitting in a queue on our server.  In the queue window, the Source for these messages is TLS and the additional information reads - The remote SMTP service does not support TLS.  

We are running MS Exchange 2003, we do use TLS however, we have a separate virtual server and connectors which has this enabled.  Can anyone suggest why this is happening?  In the Default SMTP Virtual Server TLS is definitely unchecked.

Here is a picture of the queue itself;

SMTP Server Queue
Watch Question
Lead Technical Architect
This problem has been solved!
Unlock 3 Answers and 6 Comments.
See Answers
Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

  • Troubleshooting
  • Research
  • Professional Opinions
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE