MailerLite Classic

Estimated reading: 2 minutes

Overview

AFI subscribes contacts to MailerLite Classic — the legacy MailerLite product (sometimes labelled MailerLite v1). If you’re on the new MailerLite (2024+), use the MailerLite doc instead. The two products run on different APIs and groups don’t sync between them.

Supported actions

  • Subscribe to Group
  • Update Subscriber
  • Unsubscribe

Authentication

  1. Log in to MailerLite Classic.
  2. Click Integrations > Developer API.
  3. Copy the API key (it starts with the classic v1 format).
  4. In AFI go to Settings > MailerLite Classic and paste the key.

How to create the integration

  1. In WordPress admin, go to AFI > New Integration.
  2. Pick your Sender (Contact Form 7, WPForms, WooCommerce, etc.) and the form / event to listen on.
  3. Pick MailerLite Classic as the Receiver, then pick the Task you want to run.
  4. Map sender fields onto MailerLite Classic’s fields. Email is required. Custom fields must exist on the Classic side before mapping.
  5. Optional: add Conditional Logic so the action only fires on matching submissions.
  6. Save and run a test submission. Check AFI > Log if anything looks off.

Notes & caveats

  • Classic vs new MailerLite. If MailerLite has migrated you to the new platform, the Classic API key will stop working — switch to the MailerLite integration.
  • Groups, not lists. MailerLite Classic uses Groups as its segmentation primitive — pick the right Group ID when mapping.
  • Confirmation emails. If your Classic account has double opt-in enabled, the subscriber will receive a confirmation email; only confirmed subscribers count toward your sending limits.

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