Rails 4.x - The proper way to send emails in development environments using gmail SMTP

development.rb

config.action_mailer.default_url_options = { host: "localhost:3000" }
config.action_mailer.delivery_method = :smtp
config.action_mailer.smtp_settings = {
    address:              "smtp.gmail.com",
    port:                 587,
    domain:               "domain.com",
    user_name:            "[email protected]",
    password:             "password",
    authentication:       :login,
    enable_starttls_auto: true,
}