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The Lettr Zapier integration lets you automate email sending by connecting Lettr to 8,000+ apps — no code required.

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Prerequisites

Before you begin, make sure you have:

API Key

Create an API key in the Lettr dashboard

Verified Domain

Add and verify your sending domain
You’ll also need:
  • A Zapier account (free tier available)
  • A sender address on your verified domain (e.g. notifications@yourdomain.com)

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Available Actions

Send Email

Send an email with custom HTML content, subject, sender, and reply-to address.

Send Email Template

Send an email using a template saved in your Lettr account.

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Connect Lettr to Zapier

1

Create a Zap

Go to Zapier and create a new Zap.
2

Choose a Trigger

Select your trigger app — the event that starts the workflow. For example, a new row in Google Sheets, a form submission in Typeform, or a payment in Stripe.
3

Add Lettr as the Action

Search for Lettr and choose one of the available actions:
  • Send Email — compose an email with custom HTML content
  • Send Email Template — use a template from your Lettr account
4

Connect Your Lettr Account

Authenticate with your Lettr API key when prompted.
Use an API key with sending permissions. Never share your API key publicly. See API Key Permissions for details.
5

Map Fields

Map fields from your trigger to the Lettr action:
  • From (required) — sender address on your verified domain
  • Recipient (required) — the recipient email address
  • Subject (required) — email subject line
  • HTML content (required for Send Email) — the email body
  • Reply to (optional) — reply-to address
6

Test and Publish

Test the Zap to verify emails are sent correctly, then turn it on.

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Example Use Cases

Use Send Email Template when you want to maintain consistent branding. Create templates in the Lettr dashboard and reference them in your Zaps.

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Other Integrations

Stripe

Send emails directly from Stripe

Supabase

Auth emails and Edge Functions

WordPress

Replace wp_mail with Lettr

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What’s Next

Templates

Create reusable email templates

API Reference

Send emails programmatically via the API