ActionPostmarkUpdated June 2026

How do I send transactional email via Postmark?

Short answer: Drop the "Postmark → Postmark Send Email" action anywhere in your workflow, map the inputs from upstream nodes, and publish.

Use this action All 3 Postmark actions

Inputs

The fields this action accepts.

Every field can be mapped from an upstream trigger, AI step, table row, or hard-coded literal.

Field	Type	Required	Description
From From	string	Required	Sender email (must be a verified sender signature in Postmark)
To To	string	Required	Recipient email address (comma-separated for multiple)
Subject Subject	string	Required	e.g. "e.g. Your order has shipped"
HTML Body HtmlBody	string	Required	HTML content of the email
Plain Text Body TextBody	string	Optional	Plain text fallback for email clients that don't render HTML
Tag Tag	string	Optional	Tag for categorizing this email in Postmark analytics
Reply-To ReplyTo	string	Optional	Reply-to email address

Sample request

{
  "From": "sender@yourcompany.com",
  "To": "recipient@example.com",
  "Subject": "e.g. Your order has shipped",
  "HtmlBody": "{{trigger.HtmlBody}}",
  "TextBody": "{{trigger.TextBody}}"
}

Returns

{
  "To": "recipient@example.com",
  "Message": "OK",
  "ErrorCode": 0,
  "MessageID": "b7bc2f4a-e38e-4336-af7d-e6c392c2f817",
  "SubmittedAt": "2025-01-15T12:00:00.0000000Z"
}

Use these fields in downstream nodes for routing, logging, or error handling.

FAQ

Questions about Postmark Send Email.

What does the Postmark Send Email action do in Postmark?

Sends a transactional email with HTML/text body and attachments. Postmark is purpose-built for transactional (separate marketing streams) and has industry-leading deliverability.

What inputs does Postmark Send Email require?

Required: From, To, Subject, HTML Body. Every input accepts a static value or a variable from any upstream node in your workflow.

Can I use dynamic inputs from earlier workflow nodes?

Yes. Any field on this action can pull values from upstream nodes, whether that's a form response, a trigger payload, an AI output, or a lookup result.

What happens if Postmark returns an error?

The workflow pauses on the failed node, the error message is captured in the run log, and you can retry the run with one click. Auto-retry policies are configurable per workflow with exponential backoff up to 5 attempts.

Does Postmark Send Email support batch operations?

Yes. Run Postmark Send Email inside a Loop node to process arrays. Tiny Command handles Postmark's rate limits automatically so you don't have to throttle manually.

How do I send transactional email via Postmark?

The fields this action accepts.

Apps that pair well as the trigger for Postmark Send Email.

Questions about Postmark Send Email.

Other Postmark actions.

Send postmark send email from your workflows.