Mountain View-based Google's Gmail, which has for almost three years been available by invitation only, can now be signed onto by anyone. However, the company said it is still in beta status, indicating it feels there's still work to do on the service.
Since Gmail users often stay on Google's Web site while they do searches, the company can find out more about individual preferences by widening its e-mail user reach.
Each Gmail account has at least 2.8 gigabytes of storage, or enough space for about 1.4 million pages.
Reports Wednesday said Google will probably begin charging for extra storage, but details have not yet been ironed out.