Integrate Email Marketing

Connect your website forms to your email platform so new subscribers automatically land in the right lists.

Email integration means form submissions on your site flow directly into your email marketing platform—no CSV exports, no manual imports. When someone signs up, they immediately get your welcome sequence.

This guide covers: Connecting WordPress, Shopify, and custom sites to popular email platforms.

Choose Your Email Platform

If you don’t have one yet, here are the main options:

Already have email marketing? Skip to the integration section for your platform below.

WordPress Integration

Option 1: Form Plugin Integration (Easiest)

If you use Gravity Forms, WPForms, or Contact Form 7:

1. Install your email platform’s WordPress plugin (e.g., “Mailchimp for WordPress”)
2. Connect it to your email account (API key from your email platform)
3. Edit your form and add an email signup option
4. Map form fields to your email list fields

Recommended plugins:

• MC4WP: Mailchimp for WordPress
• ConvertKit Plugin
• Klaviyo for WordPress

Option 2: Use Your Email Platform’s Forms

Every major email platform generates embeddable signup forms. The advantage: submissions go straight to your list without any plugin or API setup. The tradeoff: the form styling won’t match your theme without CSS overrides.

1. Create a form in your email platform
2. Copy the embed code
3. Paste into a WordPress Custom HTML block

This is simpler but gives you less design control.

Shopify Integration

For Klaviyo (Recommended for Shopify)

1. Install the Klaviyo app from Shopify App Store
2. Connect your Klaviyo account
3. Klaviyo automatically syncs customers and purchase data
4. Set up flows: abandoned cart, post-purchase, welcome series

Klaviyo’s Shopify integration is deep—it knows what customers bought, browsed, and abandoned.

For Mailchimp

Mailchimp’s Shopify integration covers the basics — customer sync and abandoned cart emails — but lacks the deep behavioral tracking that Klaviyo offers. If you’re already on Mailchimp and not ready to switch, this gets the job done.

1. Install Mailchimp app from Shopify App Store
2. Connect your Mailchimp account
3. Enable customer sync
4. Configure abandoned cart emails

Squarespace/Wix

Both platforms have built-in email tools that handle basic newsletters. If you need segmentation, automation sequences, or multi-step flows, connect an external platform instead. The process is the same on both: paste your email platform’s embed code into the site’s code injection area.

Squarespace: Settings → Advanced → Code Injection → paste form embed code

Wix: Add an HTML embed element → paste form embed code

Custom Sites / Zapier Method

If your form tool and email platform don’t have a native integration — or if you’re on a custom-built site — use Zapier as a bridge. It watches for new form submissions and pushes them to your email platform automatically. The free tier handles up to 100 tasks per month.

1. Create a Zap: Trigger = “New form submission” (from your form tool)
2. Action = “Create subscriber” (in your email platform)
3. Map the email field
4. Turn on the Zap

Zapier connects almost any form to almost any email platform.

Test Your Integration

After setup, always test:

1. Submit a test signup using a personal email
2. Check that it appears in your email platform within 1-2 minutes
3. Verify the welcome email (if set up) arrives
4. Check that list/segment assignment is correct

Sources

• Mailchimp
• ConvertKit
• Klaviyo
• ActiveCampaign
• MC4WP: Mailchimp for WordPress
• ConvertKit Plugin
• Klaviyo for WordPress
• Zapier