Which feature allows Mimecast to differentiate between harmful and safe email attachments?

The feature that enables Mimecast to differentiate between harmful and safe email attachments is content scanning. This process involves analyzing the contents of email attachments for potentially malicious code, malware signatures, or other indicators of threat. During content scanning, Mimecast examines various file types and applies rules and heuristics to identify risky attachments that could pose security risks to the network or users.

By using advanced scanning techniques, including machine learning and pattern recognition, content scanning helps ensure that only safe attachments reach the inbox, while harmful ones are blocked or quarantined. This capability is crucial for maintaining email security and protecting users from phishing attempts, ransomware, and other cyber threats associated with email attachments.

Other options like email archiving, threat intelligence, and transport security serve different purposes within email management and security. Email archiving focuses on data storage and retrieval, threat intelligence refers to the collection of data about threats, and transport security deals with securing the email in transit, but none of these specifically analyze the contents of attachments to differentiate between safe and harmful files.