Mailster Integration

Conversion Bridge tracks newsletter form subscriptions from Mailster as conversions. Mailster is a self-hosted WordPress newsletter plugin that lets you create subscription forms, manage subscribers, and send email campaigns — all from your own site. When a visitor successfully subscribes through any Mailster form, a conversion event is sent to all your connected analytics and ad platforms.

Enabling Conversion Tracking for Mailster

Mailster does not support per-form conversion tracking settings. Instead, tracking is enabled globally for all Mailster forms.

1. In your WordPress admin, go to Settings > Conversion Bridge > Integrations > Mailster.
2. Check the box next to Subscribe to enable tracking for all Mailster form submissions.
3. Optionally customize the conversion label. The default label is "Subscribe". You can use %id% to insert the form ID and %title% to insert the form name. For example, Subscribe: %title% would produce "Subscribe: Weekly Digest" for a form with that name. Learn more about conversion labels and values.
4. Click Save Changes to start tracking your conversions.

How It Works

• When a visitor successfully completes a Mailster subscription form, Conversion Bridge fires a subscribe conversion event. The event is triggered after Mailster confirms the submission, so only successful subscribes are tracked.
• Tracking applies to all Mailster forms on your site, including block-based forms. There is no per-form toggle — once the integration is enabled, every form is tracked.
• Each subscription is tracked as it happens on the page, so your analytics and ad platforms receive the conversion in real time.

Tracked Data

Every event includes a conversion label and conversion value.

Subscribe events include:

• id — The form ID
• title — The form name

Enhanced conversion data

Conversion Bridge automatically reads the email address from the form's email field and includes it as enhanced conversion data. No additional setup is needed.

• _email — The subscriber's email address

Custom Event Labels

The subscribe event has an optional custom label field. If you leave the label blank, the default label "Subscribe" is used.

You can include dynamic placeholders to identify which form triggered the conversion:

• %id% — Replaced with the form ID
• %title% — Replaced with the form name

For example, setting the label to Newsletter: %title% would produce "Newsletter: Weekly Digest" if the form is named "Weekly Digest".

This is helpful when you run multiple Mailster forms and want to see which one drives the most conversions in your analytics reports.