ANSMTP SMTP Component Build   
http://www.emailarchitect.net

ANSMTP Object is a high performance, easy- to-use and full-featured SMTP COM Object (email component) which enables your ASP, VB, VC++, C#, VB.NET, ASP.NET, VBS, Jscript, WScript, Delphi or other COM environment application to send rich text/HTML email using the SMTP/ESMTP protocol. ANSMTP supports all operations of SMTP/ESMTP protocol and provides many advanced features as follows: - supportText/Html/Alternative body; - support Multiple attachments and embedded pictures; - import text/html to email body from specified file; - support "AUTH MSN" authentication. - add customized headers in email; - save email as specified file; - support normal recipient, carbon copy recipient and blind carbon copy recipient; - support ESMTP "AUTH LOGIN" authentication; - DNS lookup to send email without specified smtp server; -test validity of email address; - send email via queuing of IIS SMTP Service; - support Asynchronous mode and event driving; - support unlimited threads up to the limits of operating system; - smart Threadings-Pool which can automatically increase or decrease worker thread in need; - support SSL/TLS connection; - support signed and encrypted message; - support secure password authentication; - support IPv6; - and more. Though it is simple to use, many featured examples are provided in the download to get you started quickly. New features added in this version: - support "AUTH MSN" authentication. - support mail queuing with EASendMail Service (a tool for sending mass mail).

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.

M-Chinese Mail Component   
http://www.chilkatsoft.com

M-Chinese is an ActiveX component for sending Chinese email from ASP Web sites and Microsoft Windows applications. It works as an ActiveX object but also exposes DLL functions directly. It includes an EXE for CGI operation via XMLHTTP. M-Chinese can construct and send professional plain-text and HTML e-mail, with the ability to create an e-mail from a URL or HTML file, add and zip compress attachments, and convert character encodings. M-Chinese works in ASP without your Web hoster needing to install or support the component. The license provides for royalty-free redistribution with your application, and all future version upgrades are free. It includes unlimited one-year support.

M-Arabic Mail Component   
http://www.chilkatsoft.com

M-Arabic is an ActiveX component for sending Arabic email from ASP Web sites and Microsoft Windows applications. It works as an ActiveX object but also exposes DLL functions directly. It includes an EXE for CGI operation via XMLHTTP. M-Arabic can construct and send professional plain-text and HTML e-mail, with the ability to create an e-mail from a URL or HTML file, add and zip compress attachments, and convert character encodings. M-Arabic works in ASP without your Web hoster needing to install or support the component. The license provides for royalty-free redistribution with your application, and all future version upgrades are free. It includes unlimited one-year support.

M-Japanese Mail Component   
http://www.chilkatsoft.com

M-Japanese is an ActiveX component for sending Japanese email from ASP Web sites and Microsoft Windows applications. It works as an ActiveX object but also exposes DLL functions directly. It includes an EXE for CGI operation via XMLHTTP. M-Japanese can construct and send professional plain-text and HTML e-mail, with the ability to create an e-mail from a URL or HTML file, add and zip compress attachments, and convert character encodings. M-Japanese works in ASP without your Web hoster needing to install or support the component. The license provides for royalty-free redistribution with your application, and all future version upgrades are free. It includes unlimited one-year support.