foul odor in all drains

When my washer drains I get a foul odor in the master bath. Now I get it everytime any sink,shower,tub and washer drains. In all my drains but the kitchen.

You may have a problem with your vent system. A washing machine flows a lot of water fast, and if the vent system isn't right, could siphon out the traps in the house. Have someone listen carefully at a sink when the washer is draining to see if they can hear air or sucking sounds.

Now, if this is found to be the problem, whether it is a plugged line or bad design, you'd have to be there to tell.

+1 to what jadnashua said. You have a venting problem (or a design problem)!

Are you on a septic system or city sewer