Managed extensions for VCL 

Managed VCL is the best components suite for .Net interop in Delphi Win32 and C++ Builder. It is designed to provide a way to interact with applications written in anyone of .Net languages - C#, Visual Basic.Net, JScript.Net and others.
.net framework vcl

CSMail Developer Edition 

Active X Email Components - SMTP (RFC 821), POP3 (RFC 1725) and MIME (RFC 1341) objects. BUILT IN SMTP/POP3/SOCKS PROXY SUPPORT, ESMTP AUTHENTICATION, STANDARD MIME ENCODING/DECODING,SMTP ENVELOPE, FULL SUPPORT FOR MULTIPART MESSAGES.
email e-mail smtp pop pop3 mime rfc 821 rfc 1725 rfc 822 rfc 1341 rfc 2183 activex control com