Email security service is blocking mail from a nonexistent domain

A third party contractor is providing email communications services for a business partner of ours.  They are sending messages from a domain that is not set up with A or MX records.

Our email security software, TrendMicro's Hosted Email Security (HES), is blocking those messages because the sender domain can not be found.

Understanding I could poke some holes in HES to allow for those messages to come through, is it proper to request they actually register the domain name from which they are sending, or is this a common practice?
MatthewDKAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

systechadminConsultantCommented:
they wont allow, cause it can be a spoofed email or spammer. so as hosted provider they wont allow this kind of emails. You can try to ask them to bypass the particular domain and see what they responsed
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
MatthewDKAuthor Commented:
As Gaurav noted and per TrendMicro support, "as long as we can't resolve their domain due to missing mx record then the email will always get blocked."
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Email Protocols

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.