How to automate form submissions in WordPress

Write down what should happen after someone submits the form. Common outcomes include sending an internal notification, saving the entry, creating a user, adding a CRM contact, sending a confirmation email or notifying a team in Slack.

Decide whether the workflow should run for every submission or only when a field has a particular value. This prevents you from building a broad automation and then trying to undo it with exceptions.

Open the form’s settings and look for options such as Notifications, Entries, Actions, Webhooks or Integrations. Enable entry storage before relying on email, so a message failure does not remove your only record of the submission.

For a simple workflow, the built-in route is often enough: save the entry, email the site team and send a confirmation to the person who submitted it. The drawback is that each form plugin labels and limits these settings differently, and advanced conditions may not be available.

If the destination is a CRM, helpdesk or automation service, use the form plugin’s webhook or API action when available. Copy the receiving endpoint, choose the HTTP method it requires, map each form field to the expected parameter and add the authentication token or header supplied by the receiving service.

Send a test submission and inspect the receiving service’s request log. A successful message on the WordPress page only proves that the form accepted the request; it does not prove that the external service accepted the data. WordPress provides wp_remote_post() for sending POST requests, but custom integrations must validate and sanitise submitted values first.

Use custom PHP when the form plugin has no suitable action or when the workflow needs special business logic. First find the exact submission action in that plugin’s developer documentation. WordPress does not provide one universal form-submission hook because form plugins process and store submissions in different ways.

In the callback, check the form identifier, validate the submitted fields, prevent duplicate processing and then call the required WordPress or external service function. If the request is handled through your own front-end form or REST endpoint, protect it with a nonce and never trust raw $_POST values. WordPress recommends nonces for CSRF protection and sanitisation for untrusted input.

If email is part of the workflow, configure authenticated SMTP or an email provider rather than assuming the hosting server will deliver every message. WordPress sends mail through wp_mail(), but a successful form submission and successful delivery are separate events. Check the sender address, SPF and DKIM records, spam folders and the mail provider’s logs.

When diagnosing failures, check whether the entry was saved, whether an email was generated and whether the receiving server accepted it. WordPress exposes wp_mail_failed and wp_mail_succeeded for logging mail outcomes.

Submit the form as a visitor in a private browser window, then test each important field condition. Confirm that the entry is stored, the correct notification is sent, the external system receives the expected values and the visitor sees the right confirmation message.

Test invalid email addresses, empty required fields, file uploads, duplicate clicks and submissions from mobile. The common Friday failure is a form that shows a success message while its email or webhook action is failing, so keep the stored entry or an action log available for troubleshooting.

If your form is built with MetForm, install AutomatorWP and its MetForm integration, then create a workflow with a MetForm submission as the trigger. The integration supports triggers for users or guests submitting a form, with additional triggers for specific field values in supported versions.

Choose the follow-up action, set any conditions, publish the workflow and submit a test entry. This is faster than maintaining custom code when you need no-code follow-up workflows, but it is specifically the fast route for MetForm. With another form builder, start with that plugin’s native actions, webhook support or documented integration instead.