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
Ask a Question
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

troubleshooting Question

Help with accepted domains and emails to nonexistent accounts

Avatar of king daddy
king daddyFlag for United States of America asked on
ExchangeMicrosoft 365
5 Comments1 Solution83 ViewsLast Modified:
We have 6 authoritative domains and 8 internal relay domains in a hybrid exchange environment (one 2013 server on prem and office 365 hosted email server). Out default domain is internal relay (fyi). The issue is that we are seeing emails coming in to non-existent email addresses being bounced back between our server and a barracuda spam appliance. This is filling up the queue. While it is causing a negligible delay, I have been tasked with figuring out what if any impact we would see by changing our internal relay domains to authoritative and if it would prevent the bouncing of emails between the server and the barracuda. We are looking to just dropping emails coming in to nonexistent email accounts.

Thanks for any assistance as I have not had to previously deal with this. Other methods of stopping the emails from bouncing between the server and barracuda and just being dropped are welcomed.
ASKER CERTIFIED SOLUTION
Avatar of timgreen7077
timgreen7077Exchange Engineer
Commented:
This problem has been solved!
Unlock 1 Answer and 5 Comments.
See Answers