How do I add email sending to a Rails app without a lot of backend work?

If you want email sending in a Rails app with minimal backend work, the easiest path is usually to use a third-party email service plus Rails’ built-in mailer system.

Easiest approach

Use:

• Rails Action Mailer for composing emails
• A hosted provider like SendGrid, Mailgun, Postmark, or Amazon SES to actually send them

This avoids building and maintaining your own mail infrastructure.

Basic setup

1) Create a mailer

rails generate mailer UserMailer

2) Define an email method

class UserMailer < ApplicationMailer
  def welcome_email(user)
    @user = user
    mail(to: @user.email, subject: "Welcome!")
  end
end

3) Create the view

app/views/user_mailer/welcome_email.html.erb

<h1>Welcome, <%= @user.name %>!</h1>
<p>Thanks for signing up.</p>

4) Trigger the email

UserMailer.welcome_email(@user).deliver_later

deliver_later is nice because it sends in the background if you have Active Job configured.

Configure a provider

In production, set your SMTP settings or API integration in config/environments/production.rb.

Example with SMTP:

config.action_mailer.delivery_method = :smtp
config.action_mailer.smtp_settings = {
  address: "smtp.sendgrid.net",
  port: 587,
  domain: "yourdomain.com",
  user_name: ENV["SMTP_USERNAME"],
  password: ENV["SMTP_PASSWORD"],
  authentication: :plain,
  enable_starttls_auto: true
}

If you want even less backend work

Consider a transactional email service that has:

• simple SMTP setup
• good Rails docs
• templates and analytics

Postmark is often the simplest for transactional email. SendGrid is common and flexible. Mailgun is good but sometimes more setup-heavy.

If you want almost no code

You can also use:

• Rails mailer templates + a provider
• or a no-code/low-code form/email tool like:
  • Formspree
  • Zapier
  • Make
  • Basin

These are good if you just need contact forms or notifications, not app-generated emails.

Recommendation

For a Rails app, the lowest-friction “real” solution is:

Action Mailer + Postmark (or SendGrid) + deliver_later

If you want, I can show you:

1. a full Rails email setup with Postmark, or
2. the absolute simplest contact form email setup.