If so Sorry, have to update yourselves!!!
"Hackers Dont Need Passwords To enter Your Mail account"
The above thing is proved by Robert Graham (CEO Errata Security) at his presentation on Web 2.0 hijacking presentation at Black Hat 2007
Rob demonstrated to a live audience how he can successfully hack into web based email programs like GMail, Yahoo Mail! or Hotmail using the IP Address and user name (login) without requiring any password.
Let's not go in the very technical details but he used some sniffing tools called Ferret (to copy the GMail cookies to his computers) and Hamster (to use the cookies in his browser). [Details at ZDNet, TG Daily]
You Can Stop persons like Graham??
So what can we do to prevent someone else from reading your mails on yahoomail and on Gmail?
Rob's method works when you are using the HTTP mode to access your email (http://www.gmail.com/). Therefore the trick is to always use Secure Login.
Here is a simple thing which you can do to safeguard your email in public wi-fi hot spots- Use https:// instead of the default http://- the entire session will be encrypted and the cloning cookies method will fail:
For GMail: https://mail.google.com/mail/
For iGoogle: https://www.google.com/ig
For basic HTML version
of GMail - https://mail.google.com/mail/?ui=html
You can also install the Customize Google Firefox extension, that will always force the SSL mode in GMail incase you forget to manually type the https:// GMail URLs.
It is highly recommended also because it will also encrypt your other google services to open in SSL mode, like Google Docs, Google Reader, Google Calander, Google Web history, iGoogle and there are many more.
For Yahoo mail, it is recommended to use the "Secure" mode link, that's just beneath the 'sign in' button