easy2email ASP Email Component   
http://www.easy2email.com

Easy-to-use server side ActiveX email component to effortlessly send email through SMTP mail servers from ASP or ASP.NET web pages. Features quick implementation, SMTP authentication and COM+ integration. A quick test facility is included with the configuration application to test the component without writing a single line of source code. Email messages can be sent in plain text, HTML or other MIME formats. Additional features include multiple attachments, multiple recipients, multiple CC recipients and multiple BCC recipients. Activities can be logged to text file or through ADODB (MS Access, SQL Server etc.). Reference information (for instance an order no, transaction reference etc.) can be logged with each email sent. Flexible licensing options are available.

ANPOP POP3 Component Build   
http://www.emailarchitect.net

ANPOP is a high performance and easy-to-use POP3/IMAP4 component. It enables your ASP, VB, VC++, C#, VB.NET, ASP.NET, VBS, Jscript, WScript, Delphii or other COM environment application to retrieve email from email server using POP3 and IMAP4 protocols and parse email based on MIME. ANPOP supports all operations of POP3/IMAP4 protocol and provides many advanced features as follows: - Support POP3 commands: USER, PASS, APOP, NOOP, RSET, TOP, LIST, STAT,UIDL, RETR, QUIT; - Support synchronous and asynchronous mode; - Get email header without downloading the whole email from server; - Get email size/message-id from server; - Delete/Undelete email; - Log file to record all sessions between client and server; - Load email from file or binary stream; - Save email to file or IMSGSTORE interface; - Get specified header value of email; - Parse sender, recipients, subject, body and attachments; - Export attachment to file or binary stream; - Create customize mailbox to store email files; - Load email to IPOPMSG interface; - Save/Move/Delete/Enumerate emails in specified mailbox; - Create/Clear/Delete mailbox; - Send request of retrieving email to local/remote service; - Enable ASP/ASP.NET to retrieve emails in background; - Unlimited queued request; - Edit email headers; - Support SSL/TLS connection; - Support Secure Password Authentication(SPA); - Decrypt encrypted email and verify digital signature; - Support IPv6; - Support IMAP4; - and more.

Smtp.NET   
http://www.exclamationsoft.com

Professional Email Component for ASP.NET and .NET Windows Forms which doesn’t extend the System.Web.Mail namespace but was built from the ground up to go further and offer you more. Smtp.NET was designed to be the easiest .NET email component to learn and use, unlike competitors that require you to learn their object model simply to send an email. Features HTML Email with automatic image embedding, authentication, automatic ZIP compression of attachments, support for message queuing on IIS & emailQ.NET, mail merge, multiple attachments, multiple recipients, specify multiple servers for failover and redundancy, and more. Smtp.NET is installed in the GAC (Global Assembly Cache) for easy access by all of your developers. Smtp.NET is feature rich and offers functionality that the System.Web.Mail.SmtpMail class cannot. Fully supported and documented with extensive examples to jump-start your application development. Royalty-free redistribution licenses, site-wide licenses, and multiple user discounts are available.

Add Email ActiveX Enterprise   
http://www.traysoft.com

Easily create and send text or HTML emails with attachments and embedded images from your application. AddEmail works with all development environments that support COM objects, ActiveX or OCX controls, such as Visual Basic (VB 5 and VB 6), Visual C++, VB.NET, C#, ASP, ASP.NET, Access, Delphi, PowerBuilder, FoxPro etc. AddEmail supports SMTP and ESMTP protocols with authentication, unlimited number of attachments, embedded images, non-blocking calls, progress indication events, To, Cc, Bcc and ReplyTo fields, international characters, in-memory attachments and much more. Enterprise version includes high-perfomance multithreaded SMTP engine that can queue and send emails directly to recipient mail servers. Fast and reliable component with excellent support service.

Add Email ActiveX Professional   
http://www.traysoft.com

Easily create and send text or HTML emails with attachments and embedded images from your application. AddEmail works with all development environments that support COM objects, ActiveX or OCX controls, such as Visual Basic (VB 5 and VB 6), Visual C++, VB.NET, C#, ASP, ASP.NET, Access, Delphi, PowerBuilder, FoxPro etc. AddEmail supports SMTP and ESMTP protocols with authentication, unlimited number of attachments, embedded images, non-blocking calls, progress indication events, To, Cc, Bcc and ReplyTo fields, international characters, in-memory attachments and much more. Enterprise version includes high-perfomance multithreaded SMTP engine that can queue and send emails directly to recipient mail servers. Fast and reliable component with excellent support service.