New UsersMailer

users_mailer.rb

class UsersMailer < BaseMailer
  def welcome user
    @user = user

    LocaleSaver.use_user_or_default_locale(user) do
      mail to: @user.email,
           from: email_sender_for_current_locale,
           subject: t("users_mailer.welcome.subject") do |format|
        format.html {render "welcome"}
      end
    end
  end

  def deliver_welcome_email_with_delay_for(user)
    if Rails.env.test?
      welcome(user).deliver
    else
      delay(run_at: delay_time).welcome(user)
    end
  end

end