1)   EASendMail SMTP Component (.NET Edition) 4.0
Powerful, easy- to-use and full-featured SMTP email component enables your C#, VB.NET, JScript.NET, ASP.NET or other .NET framework applications to send rich TEXT/HTML email based on SMTP/ESMTP protocol. Featured examples are included.

 2)   EAGetMail POP3 & IMAP4 Component (.NET Edition) 2.1
EAGetMail enables your C#, VB.NET, JScript.NET, ASP.NET or other .NET framework applications to parse and receive email based on POP3/IMAP4 protocol. Many advanced features are supported including TNEF parser (winmail.dat) and S/MIME.