Google is that search company right? They at one point were world renowned for how amazing their website searched, right? I mean, we all started using their company name (a noun) as a verb, meaning "to search".
If so, then why does Gmail suck so much when you search for contacts? You won't let me search by someone's email domain? I can't search on their company name? Heck I should be able to search based on their phone number or IM name!
But nope, it doesn't do this. Thumbs down.
PS: I don't know that any other email program or site allows for this either, but this is what Google does for a living.