I'll save you the effort of looking this one up on Snopes - You've seen this house before. It's a commonly used set in cinema. It is a real house, but it's in California. And Mugabe doesn't own it.
Here's a picture of one of his homes. Who's value, according to a source that describes the home, is about 8 million pounds. That's 16 million dollars to us American folks. Unfortunately, photography is strictly prohibited. A good reason why only aerial photos are available.
And, if that isn't enough, the picture on your right is a photo of his retirement home in Hong Kong. Nice place. According to Time Magazine, it could have been yours last year for about 5.7 dollars. Too bad he beat you to it, huh?
Quite frankly, why do viral emailers need to manufacture facts? Oftentimes, the reality is bad enough.