Notify Waitlisted Customers When a Product Becomes Available

The form displays a simple "Join the waitlist" header with an email input field where customers can enter their email address. The form automatically captures submissions and triggers the rest of the workflow. You can customize the header text, email field label, and placeholder text to match your brand voice. The form generates a unique URL that you can embed on product pages or share directly with customers.

This approval step pauses the workflow and sends an approval request showing the customer's email in the message. You'll receive this request via MESA's interface and can choose to "Accept" (proceed with notification) or "Reject" (stop the workflow for this submission).

Customization: You can configure alert_emails to send approval requests to specific email addresses, or add a field parameter to capture additional approval context. The workflow only continues to notification steps if you accept the approval.

Use case examples for approval:
• Wait until inventory actually arrives before approving batches of waitlist notifications
• Verify the customer's email looks legitimate before sending
• Stagger notifications to prevent overwhelming your inventory (approve 50 customers at a time)
• Add manual qualification or VIP prioritization

This step retrieves your Shopify store information, specifically {{shopify.myshopify_domain}}, which contains your store's domain. This is used to build the product URL format "https://{{shopify.myshopify_domain}}/products/{{shopify_product.handle}}" that appears in the notification email.

This step retrieves a specific product from Shopify.

Configuration: You must provide a product_id during workflow setup—find this by going to the product in Shopify admin and looking at the URL (like /admin/products/1234567890, where 1234567890 is the product ID).

The step returns complete product data including product name, URL-friendly product identifier, and all other product properties. This ensures notifications use current product information even if details changed since the customer joined the waitlist.

This step sends an email with a back-in-stock notification. The email includes:

Subject: "{{shopify_product.title}} is available now!" (uses current product name)

Message: Default message thanks them for joining the waitlist, announces availability, and includes product link "https://{{shopify.myshopify_domain}}/products/{{shopify_product.handle}}"

Customization: Edit the subject and message fields to match your brand voice. You can add product images, pricing, limited-time offers, or urgency messaging. The message field supports plain text by default; for HTML formatting, you'll need to modify the email step configuration.