Final answer:
The two types of inbound email actions are setting a value for a field in the target table, and creating a new incident based on email content.
Step-by-step explanation:
The two types of inbound email actions in the context of IT service management (specifically within platforms like ServiceNow) are:
- b. Set a value for a field in the target table.
- c. Create a new incident based on email content.
These actions describe how an incoming email can interact with an IT service management system by modifying records or creating new incidents. Option a, sending an email back to the source, is more of an outbound email activity, while option d, triggering a workflow on the email sender's account, does not directly relate to the standard functionality of inbound email actions.