Alter Exchange 2013 blocking of emails with invalid addresses

Our Exchange server is currently blocking messages that include even one invalid recipient address. I need to increase this threshold but can't find where this is configured at.
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

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.

Minecraft_ EndermanCommented:
Check transport rule:


Check Sender filtering:

Jian An LimSolutions ArchitectCommented:
I will think it is recipientfilterconfig

get-RecipientFilterConfig | fl
look for recipientvalidationenabled

to undo,
Set-RecipientFilterConfig -RecipientValidationEnabled $false

there is no threshold to avoid this. The reason is the email consist of undeliverable content, the whole email will be blocked

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
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

From novice to tech pro — start learning today.