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Campaign Monitor

Estimated reading: 2 minutes Updated August 1, 2026

Campaign Monitor is an email marketing platform popular with designers and agencies for its template-driven campaigns. Advanced Form Integration sends form submissions to Campaign Monitor as new subscribers in a chosen list.

What you’ll need

  • An active Campaign Monitor account.
  • A Campaign Monitor API key (Account Settings → API keys → Show API key).
  • Your Campaign Monitor Client ID (Settings → Clients → click your client).
  • The Advanced Form Integration plugin installed and activated.

Connect Campaign Monitor to AFI

  1. In WordPress, go to AFI → Settings → Campaign Monitor.
  2. Enter the API key and Client ID.
  3. Click Save Changes.

Create the integration

  1. Go to AFI → Add New.
  2. Configure the trigger.
  3. In Action → Platform, select Campaign Monitor.
  4. In Task, choose Add Subscriber to List.
  5. Pick the target List.
  6. Map the form fields:
  • Email (required), Name.
  • Mobile Number for SMS lists.
  • Consent to Track (yes/no/unchanged): required by some compliance regimes.
  • Custom fields by Personalisation Tag name.
  1. Optional: configure Conditional Logic.
  2. Click Save Integration.

Screenshot: AFI field-mapping screen with Campaign Monitor list and subscriber fields visible

Pro features

The Pro Campaign Monitor integration adds support for smart segments (auto-assign on subscribe based on field values) and richer custom field handling including multi-select dropdowns.

Conditional logic example

Add the subscriber to your “Premium customers” list only when the form’s customer_tier field equals “premium”. Free-tier signups go to the standard list.

Troubleshooting

“Invalid List ID”

Campaign Monitor List IDs are long alphanumeric strings, not the list name. AFI auto-loads them in the dropdown after you enter valid credentials.

Custom field naming

Campaign Monitor custom fields are matched by their Personalisation Tag (the bracketed name like [Company]), not the friendly label.

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