Receive these warning on the Exchange server, what went wrong?

This is using MS Exchange 2010 server. However, recently found  lots of the same warning event as follows:

EventID: 1035
Source: Ms Exchange Transport
Task Category: SMTPReceive

Inbound authentication failed with error: Logondenied for authentication on receive connector Default ABC. The authentication mechanism is login. The source ip address of the client who tried to authenticate is {xx.xx.xx.xx}.

What went wrong and how to troubleshoot?

thanks in advance.
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.

Manikandan NarayanswamySecurity Specialist & IBM Security GuardiumCommented:

It seems the authentication method mentioned on the receive connector is not correct. To resolve this error check the authentication type mentioned on the connector and remote client is correct. These following url will help you to resolve your issue

MASEE Solution Guide - Technical Dept HeadCommented:

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
MichaelBalackAuthor Commented:
Thanks for both experts in recommending the article that leads to problem solving. At the end, creating a new receive connector solved the problem.
MASEE Solution Guide - Technical Dept HeadCommented:
Glad to know it is fixed and thanks for sharing your solution
Please select your comment as accepted solution as it will help others in future
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.