Mail Service Cannot Deliver Email

Microsoft.SharePoint.2016.SPServiceInstance.IncomingMail.CannotDeliverEmail (UnitMonitor)

A warning state of this Monitor indicates that a large number of Incoming Email Service lookup fails.

Knowledge Base article:

Summary

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Causes

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Element properties:

TargetMicrosoft.SharePoint.2016.SPServiceInstance.IncomingMail
Parent MonitorSystem.Health.AvailabilityState
CategoryAvailabilityHealth
EnabledTrue
Alert GenerateFalse
Alert Auto ResolveTrue
Monitor TypeMicrosoft.Windows.SingleEventLogManualReset2StateMonitorType
RemotableTrue
AccessibilityPublic
RunAsDefault

Source Code:

<UnitMonitor ID="Microsoft.SharePoint.2016.SPServiceInstance.IncomingMail.CannotDeliverEmail" Accessibility="Public" Enabled="true" Target="MOSS16Core!Microsoft.SharePoint.2016.SPServiceInstance.IncomingMail" ParentMonitorID="Health!System.Health.AvailabilityState" Priority="Normal" TypeID="Windows!Microsoft.Windows.SingleEventLogManualReset2StateMonitorType">
<Category>AvailabilityHealth</Category>
<OperationalStates>
<OperationalState ID="ManualResetEventRaised" MonitorTypeStateID="ManualResetEventRaised" HealthState="Success"/>
<OperationalState ID="EventRaised" MonitorTypeStateID="EventRaised" HealthState="Warning"/>
</OperationalStates>
<Configuration>
<ComputerName>$Target/Host/Property[Type="Windows!Microsoft.Windows.Computer"]/NetworkName$</ComputerName>
<LogName>Microsoft-SharePoint Products-Shared/Operational</LogName>
<Expression>
<And>
<Expression>
<SimpleExpression>
<ValueExpression>
<XPathQuery Type="UnsignedInteger">EventDisplayNumber</XPathQuery>
</ValueExpression>
<Operator>Equal</Operator>
<ValueExpression>
<Value Type="UnsignedInteger">6873</Value>
</ValueExpression>
</SimpleExpression>
</Expression>
<Expression>
<SimpleExpression>
<ValueExpression>
<XPathQuery Type="String">PublisherName</XPathQuery>
</ValueExpression>
<Operator>Equal</Operator>
<ValueExpression>
<Value Type="String">Microsoft-SharePoint Products-SharePoint Foundation</Value>
</ValueExpression>
</SimpleExpression>
</Expression>
</And>
</Expression>
</Configuration>
</UnitMonitor>