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MailerLitePro5.16+

This integration requires Freeform Pro and a MailerLite account. It supports the current MailerLite API, not MailerLite Classic.

​Behavior

  • Creates or updates the subscriber by email address and adds them to the selected group. Other group memberships remain intact.
  • Unmapped fields and blank mapped values are left unchanged. Zero values are preserved.
  • Supports text, number, and date fields.
    • Multiple selections mapped to text fields are joined with commas.
    • Number values are passed without removing signs or decimals; use a dot as the decimal separator. =
    • Date & Time fields mapped to date fields are formatted as YYYY-MM-DD; text or custom mappings must supply that format themselves.
  • Double opt-in is controlled in MailerLite under Account settings → Subscribe settings → Double opt-in for API and integrations.
  • Does not force a subscriber status or request resubscription.
    • Existing unsubscribed, bounced, or junk contacts are not deliberately reactivated.
    • A successful API request does not necessarily mean the contact is an active subscriber.
  • API errors use Freeform's integration error handling and logs.

Before enabling the integration on a live form, test a new subscriber, an existing subscriber, an unchecked opt-in, mapped fields, and your MailerLite double opt-in settings with a test group.


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​Setup Instructions

1

​Create an API Key

  • In MailerLite, open Integrations → MailerLite API and generate a new token for Freeform. Copy the token before closing the window.
  • Create any groups and custom subscriber fields you want to use in MailerLite before configuring the form.
2

​Configure the Integration

  • In Freeform, create a MailerLite email marketing integration.
  • Enter the token in API Key, or reference an environment variable containing it.
  • Click the Save button.
3

​Finish the Connection

  • After the integration is saved, you will see an Authorize button appear.
  • Click the Authorize button.
  • If authorized successfully, you'll see a green Authorized status at the top beside the integration name.
4

​Configure the Form

To use this integration on your form(s), you'll need to configure each form individually.

  • Open the form builder and select Integrations → MailerLite.
  • Enable the integration and choose the Target Email Field.
  • Select a MailerLite group in the Mailing List setting.
  • For an optional newsletter signup, select the checkbox in Opt-in Field. When that checkbox is unchecked, no data is sent to MailerLite. Without an opt-in field, all submissions allowed by the integration rules are sent.
  • Map any Subscriber Fields and save the form. Both standard and custom fields are discovered automatically. Refresh the lists/fields in Freeform after adding them in MailerLite.
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