If someone has access to your email acccount and you are using it for things like domains, Paypal, etc, then the only thing you can do is go to your accounts and change the emails that are used. Most accounts will allow you to request that your password be sent to you, so if the hacker has your email account, or can get into it, they can get into most other things that you have.
For example, if a hacker got into your Godaddy account, they could transfer your domains into another Godaddy account if they wanted to. Since it would look like YOU transfered the domains, you would have a really tough time getting them back, I think. Although Godaddy might accept your story and help you... maybe.
So, if this happens you need to change the email account, BUT you ALSO need to change your password, because you will not know if or when they have gotten that information as well. You could change the email account and if they have the password they could just go in when they want to and mess with your account and change the email address again...
It's a great topic and I'd like to hear from others what they suggest you use for password security? In the past I heard that if you use a password that is 11 characters long it makes it much harder to be "broken". That, plus using upper and lower-case letters, some numbers, and characters like "!" and "-" help to make it more secure. Example: prO-DN!es28
Another security risk is to use the same password at more than one place. If someone finds your login information they might try the same thing on other sites. I have actually done this with great success.
We have a classified ad site and scammers have to register to post scam messages. When I find a scam ad for cell phones or other junk, I disable the account and note the email, username, and password the scammer uses. I then take some of their text from their ad and search for it in Google. I can always find some ads, so then I go to the sites, use their information to log into their account, and change their passwords, email address, and delete their ads. Or at least I could...
