[Merged] mortgage & utility payment using credit-card for accumulating reward points

Hi,

I would like to know how to pay my mortgage and utility payment by credit-card.

The reason I want to do it because I get reward points on every dollar I spend on purchase I use through the credit-card. So far every moth I been accumulating about $20-$40 dollar worth of reward which I use to get free gift cards form credit-card on-line gift-store.
I would like to know how I can use my credit card to pay for my mortgages and utility bill so I can accumulate even more points/rewards.

I do pay all my credit-card bills on-line in full every two weeks.
(no need to worry about money management problems)

thanks