What would cause this issue receiving email from a host?
Log Name: Application
Source: MSExchangeTransport
Date: 07/12/2020 06:10:51
Event ID: 1035
Task Category: SmtpReceive
Level: Warning
Keywords: Classic
User: N/A
Computer: srv-EX1.srvo.local
Description:
Inbound authentication failed with error LogonDenied for Receive connector Client srv-EX1. The authentication mechanism is Login. The source IP address of the client who tried to authenticate to Microsoft Exchange is [x.x.x.x].
Event Xml:
1035
3
1
0x80000000000000
1145792
Application
srv-EX1.srvo.local
LogonDenied
Client srv-EX1
Login
186.216.69.50
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