How does Mimecast's URL Protection work to safeguard users?

Mimecast's URL Protection functions by rewriting URLs contained in emails and scanning them in real-time when users click on those links. This process helps to ensure that users are directed to legitimate and safe websites, as the system can evaluate the URL for any potential threats or malicious content at the moment of access.

When a URL is rewritten, it leads to a Mimecast domain that performs the scanning and safety checks before allowing the user to proceed to the intended destination. This proactive approach is crucial in providing a secure environment for users, as many cyber threats originate from phishing attempts that hide malicious URLs within seemingly harmless emails.

The other choices indicate less effective or overly restrictive measures. Blocking all links, eliminating URLs, or preventing emails with links from being sent could hinder legitimate communications and productivity without addressing the specific risk associated with malicious links. This targeted scanning and rewriting process maximizes security while allowing useful email functionality.