Interesting, how would your perception change if the email included a notice saying something to the effect of, "here is you password... rest assured, we have not stored it on our system. Please memorize it and delete this email for maximum security"? Of course, you really need to protect your email as much as possible. If someone gains access to your email, they can pretty much ruin your day anyways. All they would have to do is click the "forgot password" link, wait for the email to come in to your inbox, and go from there.