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Don't let him out to poop off leash yet. Every time he needs to go out, he's got to be leashed, and walk him around the perimiter of HIS yard and let him mark HIS territory. Don't let him past where you want him to think is HIS.
Establishing territory boundaries is part of training a new dog. It's easier when the breed is already territorial- my old Boxer x was VERY easy and it only took a couple weeks of leashed pooping before she figured it out. Same goes for the road- it's NOT his territory and you should scold him if he tries to go into the street without YOUR permission.
You see he only poops and pees in the drive way though, even when we go for walks he comes home and does his stuff in the drive way most of the time and looks like we caught him pissing in the house if he goes anywhere else and can't hold it till we get back. Even at the neighbors it was on the driveway, go figure. I have never yet come across a turd in the yard and we are out there all the time. He is always leashed when we walk or even go down the road and back. My 2 year old can walk him no problem right now and he listens to her and pays attention.