Using Rails ActionMailer to send emails.

01-app--mailers--contact_mailer.rb

# rails generate mailer ContactMailer

class ContactMailer < ApplicationMailer
  def contact_email(params)
    @name = params[:name]
    self.mail({
      to: "owner@example.com",
      subject: "SiteContact"
    })
  end
end

02-app--views--mailers--contact_email.html.erb

<p>Hey Owner,</p>

<p>You've got a new contact submission from: <%= @name %></p>

<p>Here's their info:</p>

INFO

03-config--environments--development.rb

Rails.application.configure do
  # ...

  # Don't care if the mailer can't send.
  config.action_mailer.raise_delivery_errors = true

  # Use SMTP for sending emails
  config.action_mailer.delivery_method = :smtp

  # Gmail SMTP settings
  config.action_mailer.smtp_settings = {
    address:              'smtp.gmail.com',
    port:                 587,
    # Add these environment variables to figaro's application.yml
    domain:               ENV['GMAIL_DOMAIN'],
    user_name:            ENV['GMAIL_USERNAME'],
    password:             ENV['GMAIL_PASSWORD'],
    authentication:       'plain',
    enable_starttls_auto: true  }
  
  # ...
end

04-app--controllers--contact_controller.rb

class ContactController < ApplicationController
  # POST /contact
  def send_email
    ContactMailer.contact_email(params).deliver_now

    redirect_to "/contact"
  end
end