Mailster

Mailster is a popular WordPress email-newsletter plugin (self-hosted). Advanced Form Integration sends every form submission to Mailster as a new subscriber.

What you’ll need

• The Mailster plugin installed and activated on your WordPress site.
• The Advanced Form Integration plugin installed and activated.

No API key needed. Both plugins run side-by-side.

Create the integration

1. Go to AFI → Add New.
2. Configure the trigger.
3. In Action → Platform, select Mailster.
4. In Task, choose Add Subscriber.
5. Pick the Lists to assign.
6. Map the form fields:

• Email (required), First Name, Last Name.
• Custom fields by name (must be defined in Mailster first).

1. Optional: configure Conditional Logic.
2. Click Save Integration.

Related docs

• Send Contact Form 7 to Mailster
• Send WPForms to Mailster
• Conditional Logic