"No connection could be made because the target machine actively refused it" with Rails 3.2

Question

I'm using Rails 3.2, and when I try using UserMailer to send an email, it gives me the error:

"Errno::ECONNREFUSED (No connection could be made because the target machine actively refused it. - connect(2))"

on this line:

UserMailer.welcome_email(@user).deliver

This is the create function the email is supposed to be delivered in:

def create
  @user = User.new(params[:user])

  respond_to do |format|
    if @user.save
      UserMailer.welcome_email(@user).deliver
      format.html { redirect_to @user, notice: 'User was successfully created.' }
      format.json { render json: @user, status: :created, location: @user }
    else
      format.html { render action: "new" }
      format.json { render json: @user.errors, status: :unprocessable_entity }
    end
  end
end

Does anyone know how to fix this problem? I'm pretty sure I've been able to send emails fine before.

Answer 1

Found the issue, it seems I forgot to add setup_mail.rb under config/initializers.