FlowRelay
Send transactional emails from Shopify Flow
Flow action for transactional email: your provider or SMTP, with fallback, track delivery outcomes.
FlowRelay adds a Send transactional email action to Shopify Flow. You configure it once — sender name, address, reply-to, and your email provider — then use it in any workflow.
Email content is built with Liquid, so you can pull in order details, customer names, or any attribute your workflow has access to. Subject line, preview text, and body are all templatable.
Emails go out through your own provider and domain via API key or SMTP. Supported providers include SendGrid, Resend, Mailgun, and Postmark, plus anything with an SMTP endpoint. You can set a primary and a backup provider — if the primary fails, it switches automatically.
Delivery status is recorded per email: delivered, bounced, or reported as spam. Depending on your plan, the log goes back 3 to 180 days.
Good for order confirmations, account notifications, internal alerts, or anything custom you’d normally have to wire up outside of Flow.
Plans
| Plan | Price | Emails/month | Log |
|---|---|---|---|
| Free | $0 | 50 | 3 days |
| Starter | $9.99 | 500 | 30 days |
| Growth | $29.99 | 2,500 | 90 days |
| Scale | $49.99 | Unlimited | 180 days |
Fallback provider routing and delivery status tracking are available on Starter and above.