ActiveEmail

SMTP and POP3 Windows Component for VB .NET, CSharp .NET, C++ and more

send individual plain text and html mails to a large number of recipients.
CheckMail

checkmail is a powerful pop3 email checking program.
wodPop3

wodpop3 is used to access mailbox on the server using pop3 protocol
Yahoo IMAP Connector

yahoo imap connector lets you access your yahoo! email using the imap protocol.
wodMailServer

Set of components to create standalone full mail server system on your network