Mail2web is a web service which let you to login to your own email account through their website. You can login to your Yahoo! Mail, Hotmail, Gmail, or even your own domain email account using their service. Simply provide your email address and password to login.
There are 3 types of login: Intellilogin, Advanced Login, and Secure Login. With Intellilogin, you just provide your email address and password, the system will then login for you. The Advanced Login allow you to configure your server name and protocol to access. Finally, the Secure Login will use https to make sure you are using a secure connection.
You can use this service without register. But, if you want to control more than 1 email accounts and have your own contact list, you will need to register.