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

Description:
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.
LVL 1
MichaelBalackAsked:
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Manikandan NarayanswamySecurity Specialist & IBM Security GuardiumCommented:
Hi,

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

https://technet.microsoft.com/en-us/library/ff360279(v=exchg.140).aspx
http://www.microsoft.com/technet/support/ee/transform.aspx?ProdName=Exchange&ProdVer=8.0&EvtID=1035&EvtSrc=MSExchangeTransport&LCID=1033

Thanks
Manikandan
MASEE Solution Guide - Technical Dept HeadCommented:

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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
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