I want to provide web mail,what should I do?

Hi,all

I want to builder a service that provide service like hotmail,customer can send mail and receive mail use my service,the mail save in my DB server.I must use java language,servlet or JSP.

I want to know which softwares needed and what tech i must to learn?

Thanks!

[304 byte] By [jhlijun] at [2007-9-26 2:43:28]