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Some of it, yes. The details on the reports won't be accessible via PowerShell, but other data points, such as SMTP In logs, Message Tracking logs, and cmdlets like Get-Queue and Get-Message can be used to get details about any throttling or blocking activity.
I'm thinking about MSPs and monitoring and auto-responses. Would there be a way to setup a chron job to check for the blocking in order to setup a custom notification system to self or customers? Does that make sense?
- Blocking is easier to detect because NDRs are sent to the user. So you could create a job that looks for those NDRs or entries in the SMTP In logs that indicate NDRs. Also, the report in the EAC will show blocking activity is coming before it actually happens.