Exam CS0-002 topic 1 question 399 discussion

DLP policies are simple packages that are collections of mail flow rules (also known as transport rules) that contain specific conditions, actions, and exceptions that filter messages and attachments based on their content. DLP policies can use the full power of mail flow rules to detect and then act on messages in transit. For example, a mail flow rule can perform deep content analysis through keyword matches, dictionary matches, text pattern matches through regular expressions, and other content examination techniques to detect content that violates your organization's DLP policies. In addition to the customizable DLP policies themselves, you can also inform email senders when they're about to violate one of your policies, even before they send a message that contains sensitive information.

Option A is the best option because configuring the DLP transport rules to provide deep content analysis would allow the company to scan outbound emails for sensitive information, such as client lists and contact information, and prevent them from being sent to personal accounts. Option B, putting employees' personal email accounts on the mail server on a blocklist, is not effective because employees can easily use other personal email accounts.