We help IT Professionals succeed at work.
Get Started

Disable Exchange 2016 Internal Relay

1 Endorsement
Last Modified: 2016-08-17
Recently I setup an Exchange 2016 Server. Everything looks fine except the Exchange 2016 default Receive connector allows internal relay.

Eg: Two emails eric@abc.com and andrew@abc.com in my domain abc.com. An anonymous user can send emails to andrew@abc.com on behalf of eric@abc.com (no authentication required). But if anonymous user try to send email to jason@condoso.com using eric@abc.com, Exchange will refuse to send it.

May I know how could I do to restrict user authentication even for emails in the internal domain? I cannot disable the Anonymous users otherwise Exchange server will not receive any emails.
Watch Question
Solution Development Specialist
This problem has been solved!
Unlock 1 Answer and 9 Comments.
See Answer
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