def subscription_trialing(subscribable)
      return true unless EffectiveOrders.mailer[:send_subscription_trialing]

      @subscribable = subscribable
      @user = @subscribable.subscribable_buyer

      @subject = subject_for(@customer, :subscription_trialing, 'Trial is active')

      mail(to: @subscribable.subscribable_buyer.email, subject: @subject)
    end
def subscription_trialing(subscribable)
      return true unless EffectiveOrders.mailer[:send_subscription_trialing]

      @subscribable = subscribable
      @user = @subscribable.subscribable_buyer

      @subject = subject_for(@customer, :subscription_trialing, 'Trial is active')

      mail(to: @subscribable.subscribable_buyer.email, subject: @subject)
    end
Sent by the effective_orders:notify_trial_users rake task.