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Configuring ContactMonkey’s Trusted URLs in Group Policy

Overview

To ensure ContactMonkey emails display properly with images for all recipients, your IT team needs to add ContactMonkey URLs to your organization's Group Policy as trusted sites.

What This Affects

  • Outlook 365
  • Outlook Web App (OWA)
  • Outlook Non-365

Prerequisites

Before starting, ensure you have:

  • Knowledge of your ContactMonkey data hosting region (learn more here)
  • IT team member with Microsoft Group Policy Object (GPO) permissions

What is Group Policy?

Group Policy is Microsoft's security infrastructure that allows network administrators to implement specific configurations across users and computers in Active Directory environments.

Configuration Steps

Step 1: Open Group Policy Editor

  1. On your Windows Server, open Command Prompt
  2. Type gpedit.msc to launch Group Policy Management Editor
  3. In your existing trusted site GPO, navigate to: User Configuration → Policies → Administrative Templates → Windows Components → Internet Explorer → Internet Control Panel → Security Page
  4. Click Site to Zone Assignment List
  5. Click Enabled
  6. Click Show

Step 2: Add Region-Specific URLs

Enter the URLs below as names with a value of 2 (Trusted Sites):

United States (US)

  • https://contactmonkey.com (or your custom URL if applicable)
  • https://cm-email-assets.s3.amazonaws.com
  • https://7ohu5yf40b.execute-api.us-east-1.amazonaws.com/prod

European Union (EU)

  • https://tk.cmnky.co (or your custom URL if applicable)
  • https://eu-cm-email-assets.s3.amazonaws.com/
  • https://1urg7w1tvi.execute-api.eu-west-1.amazonaws.com/prod/
  • https://contactmonkeyeu.com

Canada (CA)

  • https://tkca.cmnky.co (or your custom URL if applicable)
  • https://ca-cm-email-assets.s3.amazonaws.com
  • https://ir47efhw8b.execute-api.ca-central-1.amazonaws.com/prod/
  • https://contactmonkey.ca

Australia (AU)

  • https://tkau.cmnky.co (or your custom URL if applicable)
  • https://au-cm-email-assets.s3.amazonaws.com
  • https://w4ap75wtnf.execute-api.ap-southeast-2.amazonaws.com/prod/
  • https://contactmonkey.au

Step 3: Apply Changes

  1. Click OK
  2. Click Apply
  3. Click OK

Step 4: Unblock Downloads in Trusted Sites Zone

  1. Return to Security Page and click Trusted Sites Zone
  2. Find and double-click Allow file download
  3. Select Not Configured
  4. Click Apply, then OK
  5. Allow time for the system to refresh and apply the new policy

See Also

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