Email Security

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2025-05-08

Open email attachments with Browser Isolation

You can now safely open email attachments to view and investigate them.

What this means is that messages now have a Attachments section. Here, you can view processed attachments and their classifications (for example, Malicious, Suspicious, Encrypted). Next to each attachment, a Browser Isolation icon allows your team to safely open the file in a clientless, isolated browser with no risk to the analyst or your environment.

To use this feature, you must:

• Enable Clientless Web Isolation in your Zero Trust settings.
• Have Browser Isolation (BISO) seats assigned.

For more details, refer to our setup guide.

Some attachment types may not render in Browser Isolation. If there is a file type that you would like to be opened with Browser Isolation, reach out to your Cloudflare contact.

This feature is available across all CES packages:

• CES_ADVANTAGE
• CES_ENTERPRISE
• CES_ENTERPRISE_PHISHGUARD

2024-12-19

Increased transparency for phishing email submissions

You now have more transparency about team and user submissions for phishing emails through a Reclassification tab in the Zero Trust dashboard.

Reclassifications happen when users or admins submit a phish to Email Security. Cloudflare reviews and - in some cases - reclassifies these emails based on improvements to our machine learning models.

This new tab increases your visibility into this process, allowing you to view what submissions you have made and what the outcomes of those submissions are.

2024-12-19

Email Security expanded folder scanning

Microsoft 365 customers can now choose to scan all folders or just the inbox when deploying via the Graph API.

2024-08-06

Email Security is live

Email Security is now live under Zero Trust.

2024-08-06

Microsoft Graph API deployment.

Customers using Microsoft Office 365 can set up Email Security via Microsoft Graph API.