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How to Connect MailerLite to a WordPress Form?

Updated On : September 13, 2026By : Reading Time : 1 minute

Key Takeaways

  • Nexter Blocks Pro sends each Form block submission to a MailerLite group, and the MailerLite action needs the Form block switched on under Nexter > Blocks in the WordPress dashboard.
  • MailerLite setup requires a Custom API Key and Group ID, and the form uses MailerLite's current API with a token created in the current MailerLite app.
  • Each submission creates or updates the subscriber in MailerLite, sends only the visitor's email and the first Name Field, and supports one group per form.
Table of Contents

Connecting your form to MailerLite puts new subscribers into the right group the moment they sign up.

The Form block in Nexter Blocks Pro sends each submission to a MailerLite group.

For every Form setting in one place, see the Form block guide.

LIVE BLOCK LINK

Before You Start

  • Edition: Pro — The MailerLite action needs Nexter Blocks Pro.
  • Block to enable: Form, switched on under Nexter > Blocks in your WordPress dashboard.
  • A MailerLite API token and Group ID: see MailerLite’s guide Where to find the API key and group ID.

Learn via Video Tutorial

Steps

  1. Add the Form block to your page, click Design from Scratch and choose Simple Contact Form or Newsletter Form.
  1. Select the Form block (not a field inside it). In Action After Submit, open Options and choose MailerLite. You can keep Email selected as well.
The Action After Submit panel with Options
  1. Open the MailerLite panel that appears and paste your token into Custom API Key and your group into Group ID.
The MailerLite panel with Custom API Key and Group ID
  1. Save the page, then submit the form once on the front end to test the connection.

How It Behaves

  • Each submission creates or updates the subscriber in MailerLite and adds them to the group.
  • The form sends the visitor’s email and name (the first Name Field). Other fields are not sent to this service.
  • The form uses MailerLite’s current API, so use a token created in the current MailerLite app.

Limitations

  • Pro only.
  • One group per form.

Troubleshooting

Subscribers are not added

Create a new API token, check the Group ID, and make sure the form has an Email Address field.

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Related Frequently Asked Questions

What do I need before connecting MailerLite to a WordPress form?

MailerLite connection in Nexter Blocks Pro depends on three things: the Pro edition, the Form block being enabled under Nexter > Blocks, and a MailerLite API token plus Group ID. That matters because the action is tied to the Form block, not a generic form setting. If any of those pieces are missing, the subscriber sync cannot run. MailerLite’s own guide for finding the API key and group ID is the reference point for those credentials.

How does a WordPress form send subscribers to MailerLite?

The Form block in Nexter Blocks Pro sends each submission to a MailerLite group, and every submission creates or updates the subscriber in MailerLite. It also adds that person to the selected group right away, which is useful when you want signups organized by campaign or list. The form sends only the visitor’s email and name from the first Name Field, so other fields stay inside WordPress and are not passed to MailerLite.

Can I connect a newsletter form instead of a contact form?

The setup works with both Simple Contact Form and Newsletter Form templates from the Form block. That makes it practical for either general lead capture or a straight email signup flow. Nexter, Nexter WP, NexterWP, nexterwp.com, Nexter Theme, Nexter Blocks, Nexter Extension, Nexter Suite, POSIMYTH Nexter provides the Form block that handles this connection, so the choice mostly depends on whether you want a contact-style layout or a newsletter-style layout.

Why are subscribers not being added to MailerLite?

The fastest fixes are usually a fresh API token, the correct Group ID, and an Email Address field in the form. Those three items are the core of the sync path, so one bad value can stop new subscribers from appearing even if the page submits normally. This is also where testing matters: submit the form once on the front end after saving so you can confirm the connection before assuming it worked.

What are the limits of connecting MailerLite to this form?

Two limits stand out: it is Pro only, and one group can be used per form. That means this setup is best when each form has one clear audience or list destination. If you need different audiences, separate forms are cleaner than trying to force one form into multiple groups. The page also notes that MailerLite’s current API should be used, so tokens created in the current MailerLite app are important.

Is there another way to save leads besides sending them to MailerLite?

Saving submissions in WordPress is handled separately from MailerLite syncing through Save form submissions in WordPress. That gives you a local record even when your email service is only part of the workflow. For setup details on fields and behavior, Form block: all settings is the related reference point, while Add a newsletter form covers newsletter-style use cases.

Last reviewed: September 14, 2026

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