If you want to build credit, you'll have to make your payments through RentTrack.
Most landlords also accept paper checks. If your landlord has you make your payment online through an online portal, you'll have to stop using that service.
Instead, make your payment through RentTrack's online portal. We will mail them your rent payment via USPS first class mail. This way, you can still pay online and you'll get the credit benefits from all 3 bureaus.