How to handle transactional email in Webflow Cloud after Logic was discontinued

Webflow sites requiring customized transactional email can use a Webflow Cloud App Route Handler with Postmark’s HTTP API to send branded confirmations to form submitters and notifications to site owners, replacing the limited built-in form notifications and the discontinued Webflow Logic automation. The process requires a Postmark account, a verified sender domain with DKIM and Return-Path DNS records, API credentials stored as Webflow Cloud environment variables, and a scaffolded Cloud App; Postmark’s npm package should be avoided because it is unsupported on Cloudflare Workers. A reusable fetch-based email helper can submit messages to Postmark’s email endpoint, while a contact-form handler validates JSON input, checks email formatting, sets appropriate reply-to addresses, sends both messages, and returns structured success or error responses. Client-side JavaScript on the Webflow form prevents default submission, displays status feedback, disables repeat submissions during processing, and posts form data to the handler. Common delivery problems include unsupported SDK imports, unverified sender signatures, invalid tokens, and inactive recipients after bounces or spam complaints, while future improvements may include Postmark templates, enhanced spam protection, or alternative providers such as SendGrid.

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