As part of the continuous evolution of Cyber Guru Phishing, we have introduced new sending domains used exclusively for phishing simulations. This update expands the variety of domains, making campaigns more realistic, less repetitive, and more effective in training users to recognize different types of phishing attempts.
To ensure the correct execution of campaigns and the full reliability of results, these domains must be added to the whitelist within your security systems and email filtering solutions.
Whitelisting the new domains allows you to:
Maintain variety and effectiveness in simulations without impacting real security controls;
Ensure the correct delivery of phishing simulations;
Guarantee consistency and accuracy in training data and reporting.
Required action
Please authorize the new domains in your email security systems by following the instructions available at the link below:
All useful articles for Microsoft
- Advanced Delivery (Microsoft Defender) – Cyber Guru English (US)
- Configuring the Junk Email Filter (Microsoft Defender) – Cyber Guru English (US)
- Creating Safe Links (Microsoft Defender) – Cyber Guru English (US)
- Creating Indicators for Microsoft Defender SmartScreen on Edge Browser (Microsoft Defender) – Cyber Guru English (US)
- Creating Indicators for Microsoft Defender SmartScreen on Edge Browser (Microsoft Defender) – Cyber Guru English (US)
All useful articles for Google
- Add Cyber Guru Domains to Google Workspace Whitelist – Cyber Guru English (US)
- Safe Browsing: Whitelisting URLs and Landing Page Domains of Cyber Guru – Cyber Guru English (US)
-
Configure an Allowed List for Proxy Image URLs – Cyber Guru English (US)
Deadline
The update must be completed no later than 31 March 2026.
If whitelisting is not performed, simulations may be blocked or only partially delivered, resulting in reduced campaign effectiveness.
Support
For support requests: https://support.cyberguru.eu/hc/en-us/requests/new or contact your CSM.