Configuring ContactMonkey’s Trusted URLs In Group Policy

If your images are not displaying automatically for your recipients, your IT team may need to add ContactMonkey-specific URLs to your Group Policy. If these URLs are not added, it can result in some aspects of ContactMonkey being blocked and not performing as expected. This can look like:

Emails sent through ContactMonkey appear as external emails in any capacity.
Images not loading automatically.

Applies To:

❌ Gmail

✅ O365

✅ OWA

✅ COM Add-In

Getting Started

To complete these steps, you will need to have:

Knowledge of which country your ContactMonkey data is hosted in. Learn more about Changing Where Your ContactMonkey Data Is Hosted.
IT team member with permission to update Microsoft's Group Policy Object (GPO).

What is Group Policy?

Group Policy is a hierarchical infrastructure that allows a network administrator in charge of Microsoft's Active Directory to implement specific configurations for users and computers. Group Policy is primarily a security tool that can apply security settings to users and computers.

How can Custom URLs be used to provide added security

Customers utilizing CustomURLs will replace references to their local ContactMonkey Url (contactmonkey.com, contactmonkeyeu.com, contactmonkey.ca, contactmonkey.au) with a unique custom domain, such as comms.abcz.com. This limits one of the allowed domains to a custom domain unique to the customer, increasing the security.

Follow the steps below to add ContactMonkey's trusted URLs to your Group Policy. These policies can be applied individually or as a part of an Active Directory Group Policy.

On your Windows Server device, open Command Prompt and type gpedit.msc to open the Group Policy Management Editor.
In your existing trusted site GPO, navigate to:
User Configuration >
Administrative Templates >
Windows Components >
Internet Explorer >
Internet Control Panel >
Security Page and click Site to Zone Assignment List
Click Enabled, then Show.

Depending on your region, enter the corresponding URLs as names with a value 2 (Trusted Sites).

US	EU	CA	AU
https://cm-email-assets.s3.amazonaws.com https://contactmonkey.com or Custom URL https://7ohu5yf40b.execute-api.us-east-1.amazonaws.com/prod	http://contactmonkeyeu.com or Custom URL https://eu-cm-email-assets.s3.amazonaws.com/ https://1urg7w1tvi.execute-api.eu-west-1.amazonaws.com/prod/	http://contactmonkey.ca or Custom URL https://ca-cm-email-assets.s3.amazonaws.com https://ir47efhw8b.execute-api.ca-central-1.amazonaws.com/prod/	http://contactmonkey.au or Custom URL https://au-cm-email-assets.s3.amazonaws.com https://w4ap75wtnf.execute-api.ap-southeast-2.amazonaws.com/prod/

1. Click OK
2. Click Apply
3. Click OK
4. Give your system time to refresh and apply this new policy.

Related articles:

Bypassing ContactMonkey IPs In Microsoft 365 Defender

Email At Scale: Explained

Sending Limits with ContactMonkey