troubleshooting Question

How to deny user send to external email domain except one email domain

Avatar of Yalan
Yalan asked on
Exchange
8 Comments1 Solution544 ViewsLast Modified:
My client want to only allow theiremail domain @abc.com send to @xyz.com (Partner company)
@abc.com user cannot email email to any other external address except @xyz.com

Transport Rule is set as below

Form a member of Distribution list
and send Delivery not authorized, message refused to sender with 5.7.1
except when the text "to" appears in a xyz.com

Test results
1. User send an email to yahoo.com -- denied
2. User send an email to xyz.com -- allowed
3. User send an email to yahoo.com and to xyz.com - email sent out.

How to deny test result 3?
ASKER CERTIFIED SOLUTION
Join our community to see this answer!
Unlock 1 Answer and 8 Comments.
Start Free Trial
Learn from the best

Network and collaborate with thousands of CTOs, CISOs, and IT Pros rooting for you and your success.

Andrew Hancock - VMware vExpert
See if this solution works for you by signing up for a 7 day free trial.
Unlock 1 Answer and 8 Comments.
Try for 7 days

”The time we save is the biggest benefit of E-E to our team. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange.

-Mike Kapnisakis, Warner Bros