One week after getting my first iPhone (this past fall), I must have gotten hacked or something.
The guy at the AT&T store set my iPhone up to link with my yahoo e-mail account as the default email. One week later, everyone got a message from my yahoo account. Because my work e-mail was in there, I got one from myself at work. Message just said something like "Hey freind, you should really check this out (with a link)", and it was from my yahoo account.
The weird thing was, when I checked my yahoo account from my laptop, nothing seemed out of the ordinary. But, when I looked at my yahoo e-mail from my iPhone, I would see a lot of "undelieverable" messages that went to my contacts that were no longer valid. Those "undeliverable" messages were ONLY on the phone. When I would log on the laptop to double-check my account, you guessed it, they were not there.
I know what a lot of people may say. It is a web-based e-mal system. It shouldn't matter what laptop or internet devise I use, it should all be the same, from the same internet host/server at yahoo. Yet..... there it was.