1. New, highly visible Outlook on the Web safety tips will alert users to emails from untrusted sources.

2. For them, it has become second nature to not open email attachments from untrusted sources or to download risky applications.

3. Vendors are improving techniques like mandatory access control to protect the host and containers from untrusted container processes.

4. Use extreme care when using this method in a WebView which could contain untrusted content.