FlowRelay - send emails from Shopify Flow
Send emails from Shopify Flow workflows — fully customized, using your email service, with delivery tracking
FlowRelay adds the Send transactional email action to Shopify Flow. Email content is customizable using Liquid variables — pull in order details, customer names, or any attribute from your workflow. Emails go out through your own provider (such as SendGrid, Resend, Mailgun, or Postmark) and domain via API key or SMTP. Delivery status is recorded for each email: delivered, bounced, or reported as spam. Use it for order confirmations, account notifications, internal alerts, or any custom email.
Features
Native Shopify Flow action
Appears as a built-in action in Shopify Flow — no webhooks, custom code, or third-party automation tools required.
Your email provider
Connect SendGrid, Mailgun, Resend, or Postmark via API key for full delivery tracking, or use any SMTP server (bounce and spam reporting not available with SMTP).
Automatic failover
Set a primary and backup provider. If the primary fails, FlowRelay switches automatically so emails keep going out.
Delivery tracking
See whether each email was delivered, bounced, or reported as spam — per send, not just aggregate stats.
Liquid variables
Customize subject, preview text, and body with Liquid — pull in order details, customer names, or any workflow attribute.
Your sender identity
Send as your brand with a custom sender name, from address, and reply-to — not a generic platform address.
Start sending emails from Shopify Flow
Install FlowRelay, connect your email provider, and trigger your first email in minutes.
Install on Shopify