📬ESP Integration

Integrate MailAdx with Constant Contact newsletters

Constant Contact supports custom HTML code blocks in email templates. Add MailAdx's open-time ad tag to monetize your Constant Contact newsletter audience with programmatic and direct-sold demand.

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Why add MailAdx to Constant Contact?

Open-time ad serving — impressions count only on genuine opens
No revenue share — flat per-impression fee, you keep the rest
Direct-sold + programmatic demand in a single waterfall
Custom price floors per ad placement
Real-time delivery dashboard and per-send reporting
Native ads (composite PNG) and standard banner formats

How to integrate MailAdx with Constant Contact

  1. 1

    Create a MailAdx publisher account

    Sign up and set up your ad placements in the Publisher Portal.

  2. 2

    Add a Code block in Constant Contact

    In the Constant Contact email builder, drag a Code block into your template where the ad should appear.

  3. 3

    Configure subscriber personalization

    Constant Contact uses [contact field] syntax for personalization. Set up a custom field for the SHA-256 email hash and reference it in the ad tag.

  4. 4

    Test and activate

    Send a test email, confirm the ad loads on open, and publish your template.

email-template.html
<!-- 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 -->

Related resources

ESP Integration Guide →Publisher Platform →

Ready to monetize your Constant Contact newsletter?

Free to start. No revenue share. Direct advertiser relationships from day one.

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