FlowPost Tutorial

Last updated: September 11, 2026

Send transactional email from Shopify Flow through your own provider and domain — using FlowPost’s Send transactional email action.

Setup in 5 steps

Install Shopify Flow + FlowPost
FlowPost only sends when a Flow workflow runs. Install Flow, then open FlowPost from Apps.
Connect your email provider
Settings → pick SMTP or an API provider → Save → Send test email. Don’t skip the test.
Copy a template
Templates → pick one → Send test (optional) → Copy all. Keep the {{ Liquid }} tags.
Build the Flow
Admin → Flow → new workflow → add action “Send transactional email” → paste To, Subject, HTML → turn on.
Confirm in Logs
Place a test order (or run the workflow). Check FlowPost → Logs. Failed sends can be retried.

Ready-made Flow recipes

In Shopify Flow, create a workflow with the trigger below, add Send transactional email, then paste the matching FlowPost template.

Order confirmation (customer)

Thank the buyer with items, totals, and shipping address.

Trigger: Order created
To: {{ order.email }}
Template: Order confirmation — customer
Subject: Thanks for your order {{ order.name }}

Paste the template HTML into the Flow action body field (keep Liquid as-is).
Works best after your From domain has SPF/DKIM set at your provider.

New order alert (staff)

Notify your team the moment an order lands.

Trigger: Order created
To: ops@yourstore.com
Template: New order — staff alert
Subject: New order {{ order.name }} received

Use a fixed staff inbox in To, or a comma-separated list if your provider allows it.
Add a condition (e.g. total > 200) if you only want high-value alerts.

Shipped / tracking (customer)

Send tracking when fulfillment is created.

Trigger: Fulfillment created
To: {{ order.email }}
Template: Order shipped
Subject: Your order {{ order.name }} is on the way

The shipped template includes tracking Liquid when fulfillments have tracking info.
If your trigger exposes fulfillment variables, keep those Liquid tags from the template.

COD / payment pending

Remind customers or staff about cash-on-delivery orders.

Trigger: Order created
Condition: Payment gateway / tags include COD (or unpaid)
To: {{ order.email }}
Template: COD alert
Subject: Cash on delivery for {{ order.name }}

Add a Flow condition so this only runs for COD checkouts.
Staff copy: change To to your warehouse email and use the same template.

Refund notice (customer)

Confirm a refund after you issue it in Shopify.

Trigger: Refund created
To: {{ order.email }}
Template: Refund issued
Subject: Refund for {{ order.name }}

Transactional refunds are clearer when they come from your store domain (not a shared ESP).

Flow action fields

To— Customer: {{ order.email }}. Staff: a fixed address like ops@yourdomain.com.
Subject— Supports Liquid from the workflow (order.name, shop.name, etc.).
HTML body— Paste from Templates → Copy. Do not strip {{ … }} tags — Flow fills them at send time.
Preview text (optional)— Inbox snippet after the subject. Optional but improves open rates.
From name / From email / Reply-to (optional)— Override Settings for this send. From email must be allowed by your provider.
Attachment URLs (optional)— One HTTPS URL per line (max 5, 5MB each). Trial and paid plans.

Useful Liquid

Customer email: {{ order.email }}
Order number: {{ order.name }}
First name: {{ order.customer.firstName }}
Shop name: {{ shop.name }}
Order total: {{ order.totalPriceSet.shopMoney.amount }}

Troubleshooting

I can’t find the FlowPost action

In Flow, search actions for “Send transactional email” or “FlowPost”. Reinstall FlowPost if the action is missing after install.

Liquid shows as raw {{ … }} in the inbox

You pasted into a field that doesn’t run Liquid, or used the wrong trigger variables. Build the workflow from an order/fulfillment trigger and paste into FlowPost’s action fields.

Logs say Sent but nothing arrives

Check Spam/Promotions. Confirm From matches your provider domain. For Gmail/Microsoft 365 use an App Password. Authenticate SPF/DKIM at your provider.

Send failed in Logs

Open the error on the log row, fix provider credentials or From address, then use Retry when the body was saved — or fix the Flow and trigger again.

More help

FlowPost by AVOITS. Support: info@avoits.com.