CyberGraph - Image Tracker EOL - Mar 2026

Service Update

By	June 18th, 2026
Product(s)	CyberGraph
Who's affected	Customers using the CyberGraph Image Tracker feature in the Mimecast Administration Console. All other CyberGraph capabilities are not affected.

Overview

Mimecast is retiring the Image Tracker feature in CyberGraph. This change reflects the evolution of native tracking pixel protection in leading email platforms and allows Mimecast to focus CyberGraph innovation on higher-impact capabilities such as relationship analysis, cross-tenant threat graphing, and contextual warning banners.

Effective June 18th, 2026, the CyberGraph Image Tracker configuration options will be removed from the Mimecast Administration Console. All other CyberGraph capabilities, including contextual warning banners, AI threat detection, social graphing, and identity graph continue without interruption and remain a key focus of ongoing investment.

What's changing

1. Retirement date: On 18 June 2026, the CyberGraph Image Tracker feature reaches end of life.
2. Policy configuration: Image Tracker configuration options will be removed from the CyberGraph policy interface in the Mimecast Administration Console. Any existing policies that have Image Tracker enabled will simply stop applying that setting.
3. Historical Image Tracker data: Tracker logs, key employee details, and competitor domain information will be retained only for your organization's standard Mimecast retention period. After this, the data will no longer be available.
4. Previously received emails: For emails received before June 18th, 2026, containing Mimecast-rehosted images:
   • Those images will continue to display until December 18th, 2026.
   • After 18 December 2026, emails will attempt to load images from their original sources.
   • If the original source is no longer available, the image will not appear, but the email content remains readable.
5. Focus of future investment: CyberGraph investment will prioritize,
   • Relationship and identity analysis
   • Cross-tenant threat graphing
   • Contextual warning banners and advanced phishing/impersonation detection

Note on the Security Intelligence Dimension: We recognize that native email client protections don't fully replicate Image Tracker's security intelligence - specifically, detecting threat actors using tracking pixels to profile your organization. While this attack vector remains real, our CyberGraph investment is going to focus on more advanced detection: relationship analysis, cross-tenant threat graphing, and contextual warning banners. These capabilities address the downstream consequences of attacker profiling - phishing and impersonation attempts with far greater precision than tracker interception.

Recommended actions

To prepare for the retirement of CyberGraph Image Tracker, we recommend that you:

• Review your CyberGraph policies: Identify any policies that currently rely on Image Tracker settings, and confirm that your protection outcomes remain acceptable once this setting is no longer applied after June 18th, 2026.
• Export Image Tracker data if required: If needed, export your historical image tracker data in CSV format out of the Mimecast console before your retention period expires. If you require guidance on how to export this data before removal, contact your Mimecast Customer Success Manager.
• Archive important emails with critical images: For any business-critical emails that depend on Mimecast-rehosted images, ensure they are archived or exported before December 18th, 2026, in case the original image source becomes unavailable.

If no current processes or reporting in your organization rely on Image Tracker data, and you do not require long-term access to historical tracker information, then nothing further needs to be done as a result of these changes.

Questions or concerns?

If you have any questions about this change, please contact your Mimecast Customer Success Manager/Account Executive or Mimecast Support.

See Also...

• Google Gmail - Image Proxying documentation
• Microsoft Outlook.com - External Image Protection
• Microsoft Outlook (M365) - Block External Images