We currently have the ability for users to submit tickets into Service Manager via email.

Can someone suggest a way we can monitor the email connector flow...so that if the emails stop working we can receive an alert?

Hi,

You can add an event log's monitor in SCOM for events with the source Exchange Connector in the Operations Manager log of the SCSM management server where Exchange connector is deployed. It will help to catch errors. However, if for some reasons the connector's workflow doesn't run at all, you have to monitor the status of the rule that EC's wizard creates. The EC's rule name always looks like ExchangeConnector.eac55a54037b43f78d83e6fhaf59d657, so you can get it by running the PS code like this from the Service Manager shell:

Get-SCSMConnector | ? {$_.DisplayName -like 'Exchange*'} | %{$_.ConnectorId}