Originally posted by csa
I've never used my email address with Home Depot before yesterday in person at the store.
Someone else may have though.
In the thread I linked to, I mentioned getting emails from shutterfly about someone else's order (I've never used shutterfly). We have similar names - her first was my last and I think my first was her husbands name... I forget the exact details, but essentially her email address would be very similar to mine (both are @gmail.com). When she registered her account she must have screwed up and her typo ended up being a real email address (mine). As a result, there is a shutterfly account under my email with all her other contact info, I received all her email confirmations for the order and have been getting shutter fly coupons ever since (despite a few attempts to notify them of the error).
This isn't necessarily what happened to you, but it's a way an email address can end up registered with another persons information.