1)   .NET Mail Components 1.6
NetXtremeMail .NET component allows you to retrieve, create, load, process save and send mails using an easy-to-use interface. It supports POP3, IMAP and SMTP.

 2)   NetXtremeMailMerge Suite 2008Vol2
Safabyte Mail Merge Suite is a set of flexible and easy-to-use .NET components for generating dynamic email content, securely sending, receiving, signing/verifying, encrypting/decrypting and modifying e-mail messages.

 3)   NetXtremeFtp Component 2.0
NetXtremeFtp .NET class library offers a number of classes that make the work of transferring files directly from your application using FTP/SSL more easily.

 4)   .NET Email Verifier Component 1.3
NetXtremeEmailVerifier is an easy-to-use .NET component to detect invalid email through syntax validation, black list, white list and mail box validation without sending emails to recipients.