Add newsletter ad revenue to HubSpot marketing emails
HubSpot Marketing Hub supports custom HTML modules in email templates. Integrate MailAdx via a personalized token for the subscriber email hash and an open-time ad image URL.
Why add MailAdx to HubSpot?
How to integrate MailAdx with HubSpot
- 1
Create your MailAdx publisher account
Sign up and configure ad placements with floor CPMs in the Publisher Portal.
- 2
Create a custom coded email template module in HubSpot
In HubSpot's email editor, add a custom HTML module. HubSpot uses HubL personalization tokens for contact properties.
- 3
Set up the email hash contact property
Create a custom contact property for the SHA-256 email hash. Populate it via HubSpot workflows or API when contacts are created or updated.
- 4
Paste the MailAdx ad tag with the HubL token
Reference your custom property in the ad tag URL (e.g., {{ contact.email_hash }}). Paste the complete tag into your HTML module.
- 5
Test and go live
Send a test email, verify the ad loads on open, and activate for production sends.
<!-- MailAdx ad tag — decision runs at open time -->
<a href="https://mailadx.com/api/v1/serving/click?pub=YOUR_PUB&pk=header&eh={{EMAIL_SHA256}}"
target="_blank">
<img src="https://mailadx.com/api/v1/serving/display?pub=YOUR_PUB&pk=header&eh={{EMAIL_SHA256}}&w=600&h=100"
width="600" height="100" alt="" />
</a>
<!-- Replace {{EMAIL_SHA256}} with your ESP's email hash merge tag -->HubSpot + MailAdx: common questions
Does MailAdx work with HubSpot workflows?
Yes. Any HubSpot marketing email template can include the MailAdx ad tag. Automated workflow emails trigger the same open-time ad decision as manual campaigns.
What HubSpot plan do I need?
You need Marketing Hub with email sending and the ability to add custom HTML modules. Most Professional and Enterprise plans support this.
Related resources
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