MailerLite Integration #

Automatically add form submitters to a MailerLite group when they submit a Contactum form.

Requirements #

• Contactum Pro
• An active MailerLite account
• A MailerLite API token with read/write access

Get Your MailerLite API Key #

1. Log in to MailerLite
2. Go to Integrations → API
3. Generate a new token
4. Enable Read and Write permissions
5. Copy the API token

Keep your API token private. Anyone with the token can manage your subscribers.

Connect MailerLite in Contactum #

1. Go to Contactum → Settings → Integrations → MailerLite
2. Paste your API key
3. Click Save Settings

If the API key is valid, Contactum will display a successful connection message.

Enable MailerLite on a Form #

1. Open the Contactum form builder
2. Go to Form Settings → Integrations
3. Enable MailerLite
4. Click Configure

Configure Field Mapping #

Field	Required	Description
Group	Yes	Select the MailerLite group
Email	Yes	Map the email field from the form
First Name	No	Map subscriber first name
Last Name	No	Map subscriber last name

Using Smart Tags #

Example merge tags:

Email      → {email}
First Name → {first_name}
Last Name  → {last_name}

How Subscriptions Work #

1. The visitor submits the form
2. Contactum processes the entry
3. The integration validates the API key and configuration
4. The subscriber is added to the selected MailerLite group

Example API Payload #

{
  "email": "subscriber@example.com",
  "fields": {
    "name": "Jane",
    "last_name": "Doe"
  },
  "groups": [
    { "id": "group_id" }
  ]
}

Subscriber Behaviour #

Scenario	Result
New email address	Subscriber created and added to group
Existing email	Subscriber updated
Different group	Subscriber added to additional group
Empty email	Subscription skipped

Troubleshooting #

API Key Not Validating #

• Use the new MailerLite API
• Confirm the token is active
• Check for extra spaces in the token

Group Dropdown Empty #

• Refresh the groups list
• Ensure groups exist in MailerLite
• Save and verify the API key first

Subscribers Not Appearing #

• Enable MailerLite on the form
• Select a group
• Map the Email field correctly
• Check Contactum entries
• Review wp-content/debug.log

Important Notes #

• Only one MailerLite group can be selected per form
• The integration uses MailerLite API v3
• API credentials are stored in WordPress options