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Prerequisites

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

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1. Install

Get the Resend Ruby SDK.

gem install resend

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2. Send email using HTML

The easiest way to send an email is by using the html parameter.

index.rb
require "resend"

Resend.api_key = "re_123456789"

params = {
  "from": "Acme <onboarding@resend.dev>",
  "to": ["delivered@resend.dev"],
  "subject": "hello world",
  "html": "<strong>it works!</strong>"
}

sent = Resend::Emails.send(params)
puts sent

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3. Try it yourself

Ruby Example

See the full source code.

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