Intranet mailing system

[raji77]

I am trying to develop email system for intranet. It's basically for office use. User (employees) will not able to send and receive emails from outside domain. I am planning to use ASP, Visual Interdev, SQL server 2000, IIS 5.1 and windows XP.
I am not sure which ASP component I need to use to send and receive email. Do I need to use CDONTS?
Also do I need to use SMTP server inbuilt in IIS? I am planning to store emails in SQL. How to go about this and which protocol I will be using. Do I need to use POP3 and SMTP server? If yes, how to do that. If someone can guide me on this..