How would you scope a policy that should apply to all mail from a particular IP range, regardless of email addresses?

The correct answer is rooted in the context of configuring a policy that targets all mail from a specific IP range. By selecting a policy scope of "From Everyone To Everyone," you ensure that every email, irrespective of sender or recipient domains, is encompassed within the defined rules as long as the source IP falls within the specified range. This approach allows for comprehensive coverage of all email traffic from that IP range, ensuring that the policy is uniformly applied without excluding specific users or domains.

In contrast, other options would limit the scope in ways that undermine the objective of including all email traffic from that IP range. Selecting "From Internal To External," for instance, restricts the policy to emails sent between internal and external parties, potentially omitting emails that originate from external sources outside the specified range. Similarly, using "From Specific Domains To Everyone" or "From Everyone To Specific Users" narrows the applicability of the policy, thereby failing to encompass all mail from the desired IP range, thereby missing the goal of a broader enforcement.