Going up, going down...

[Lifes Twists]

Bright,

I agree with Lois, but maybe do it in a little different fashion.

I would send him an email and ask him to change his address at the post office. Explain to him that you find his taste in subject matter to be offensive and you would prefer that it not come to your home. Suggest to him that if he is unable to do it himself or not willing too then the only alternative you will have is to file a change of address for him at the post office having his mail redirected to his place of employment.

I am sure this will get an immediate response with out being too confrontational.