I use the Avery paper but it has 4 cards per sheet.
I have a Brother 8530 CDWT with an envelope tray that I am trying to print postcards. The size of the card stock is 6X8 It prints with the card stock. It does not jam. The printing would be successful if I could only fit the picture onto the post card! BUT I CAN'T EVEN SET IT TO LANDSCAPE!