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MailBluster

Estimated reading: 2 minutes Updated August 1, 2026

MailBluster is an affordable email marketing platform for managing large subscriber lists. Advanced Form Integration creates leads in MailBluster from WordPress form submissions.

What you’ll need

  • An active MailBluster account.
  • Your MailBluster API credentials (see below).
  • The Advanced Form Integration plugin installed and activated.

Get your MailBluster API key

  1. Sign in to your MailBluster account.
  2. Go to Settings → API and copy your API Key.
  3. In WordPress, go to AFI → Settings → MailBluster.
  4. Click Add Account, paste the API Key, and give the account a name.
  5. Click Save.

Create the integration

  1. Go to AFI → Add New.
  2. Give the integration a name, for example Form to MailBluster.
  3. Under Trigger, pick the form plugin and the specific form.
  4. Under Action → Platform, select MailBluster.
  5. In Task, choose Create New Lead.
  6. Pick the saved account.
  7. Map your form fields onto the fields listed below.
  8. Optional: open Conditional Logic to limit which submissions are sent.
  9. Click Save Integration.

Screenshot: AFI field-mapping screen with MailBluster lead fields visible

Tasks supported

Create New Lead

Creates a new lead in MailBluster. The email field is used as the unique identifier for deduplication.

Field Field key Required Notes
Email email Yes Used for deduplication
First Name firstName No
Last Name lastName No
Phone phone No
Company company No
Job Title jobTitle No
Country country No
City city No

Pro features

The Pro integration extends the free version with additional capabilities. Pro uses the same MailBluster connection.

Feature comparison

Feature Free Pro
Create lead
Standard fields
Custom fields No

Conditional logic example

Only send data to MailBluster when specific conditions are met. For example, add a condition on a form field to control which submissions are forwarded.

Troubleshooting

Nothing arrives in MailBluster

Open AFI → Log and find the most recent entry. AFI stores the request URL, body, and raw response.

API credentials rejected

Verify your credentials in your MailBluster account settings. If they were regenerated, update them in AFI → Settings → MailBluster.

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