I've been doing this for a while, I've only really gotten static about it once. A small online retailer, their fraud department cancelled my order after it had already been charged and shipped. It was interesting, I didn't realize they could even do that but they had the carrier recall it. The customer service rep said they thought it was fraud somehow, despite my card address matching the shipping address, because I was impersonating their business by using [buinessname]@[mydomain]. I pointed out I wasn't sending anything with that address, only receiving. She didn't seem to understand my point. Oh well. They resent it overnight and I haven't purchased anything from them since. I love this setup, that experience didn't deter me in the least.