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This guides utilizes an open source library contributed by a community member. It’s not developed, maintained, or supported by Resend directly.

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Prerequisites

To get the most out of this guide, you’ll need to:

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1. Install

Install by adding resend to your list of dependencies in mix.exs: 
def deps do
  [
    {:resend, "~> 0.4.5"}
  ]
end

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2. Send email using Swoosh

This library includes a Swoosh adapter to make using Resend with a new Phoenix project as easy as possible. All you have to do is configure your Mailer: 
config :my_app, MyApp.Mailer,
  adapter: Resend.Swoosh.Adapter,
  api_key: System.fetch_env!("RESEND_API_KEY")
If you’re configuring your app for production, configure your adapter in prod.exs, and your API key from the environment in runtime.exs: 
config :my_app, MyApp.Mailer, adapter: Resend.Swoosh.Adapter

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3. Try it yourself

Phoenix App

Full Phoenix web framework application

Basic Send

Basic email sending

Attachments

Send emails with file attachments

Templates

Send emails using Resend hosted templates

Scheduling

Schedule emails for future delivery

Audiences

Manage contacts and audiences

Domains

Create and manage sending domains

Inbound Webhooks

Receive and process inbound emails

Double Opt-in

Double opt-in subscription flow