Chilkat WebMail ASP Email Component
Powerful POP3/SMTP email client specifically tailored to be used in ASP websites.
ftp://www.chilkatsoft.com/WebMail.exe - 371Kb - Download - Screenshot

Email caster
Email caster is a marketing tool software that can validate emails list and send customized message  directly to recipients and get instant feedback. It has embeded in SMTP relay ,so you do not need using the SMTP relay server of your ISP. In addition,Email caster can give you instant feedback...
http://www.worldminer.com/emailcaster.exe - 699Kb - Download - Screenshot

Local SMTP Relay Server
Local SMTP Relay Server is a SMTP server program for Windows that lets you send email messages directly from your computer. Along with a mass mailer the program can be used as a relay server for sending newsletters, distributing messages to different mailing lists, sending notifications to your... Local SMTP Relay Server is very fast, while sending, it establishes dozens of SMTP connections, and gets the most out of your Internet connection. ... Local SMTP Relay Server supports all email programs including Outlook Express and Eudora, but best optimized to work with Outlook Express.
http://www.getfreefile.com/download/localsrv.zip - 1Mb - Download - Screenshot

Advanced SMTP Server
Advanced SMTP Server is a system-tray local SMTP server program for Windows that lets you send email messages directly from your computer to recipient mailboxes. Along with a mass mailer the program can be used as a relay server for sending newsletters, distributing messages to different mailing... Advanced SMTP Server is very fast, while sending, it establishes dozens of SMTP connections, and gets the most out of your Internet connection. ... Advanced SMTP Server supports all email programs like Outlook Express, Outlook, Eudora, etc.
http://www.softstack.com/download/advsmtp.zip - 1Mb - Download - Screenshot

PBEmail
Award-winning PBEmail is an Email Component that includes an ActiveX Control (OCX) and ActiveX DLL. It can send emails without any SMTP server configuration by the user. PBEmail detects the recipient's SMTP server and sends each email directly, bypassing any SMTP server! ... Every Email sent using the PBEmail Component can include attachments, and can be formatted in HTML, text or alternate. ... Security it's important for us, and that's why PBEmail includes SSL/TLS support, and S/MIME signing and encryption to be one of the most secure email component in the market.
http://download.perfectionbytes.com/pbemail.exe - 4Mb - Download - Screenshot

TopMail
TopMail is an email client that lets you send anonymous emails from any email address to any email address. All you need is to be online, you don't need to have an email account. With TopMail you can instantly send out emails that appear to arrive from any email address or name you want. ... TopMail can also auto detect an SMTP server to send the emails thru making the 'send' process as simple as possible.
http://www.iipwr.com/TopMail_Install.exe - 290Kb - Download - Screenshot

Local SMTP Server Pro
Local SMTP Server Pro is a SMTP server program that lets you send email messages without help of your ISP, directly from your local PC to recipient mailboxes. You can use your favorite email client along with this software the way you used to do it before. ... To start using this server with your favorite email program, just use the word "localhost" instead of your current SMTP host in the SMTP settings. ... Increase your privacy by using this server instead of your ISP's SMTP account. ... This server has a built-in firewall that lets you protect it from the outside of the Internet.
http://www.pc-safety.com/download/lsmtppro.zip - 1Mb - Download - Screenshot

1st SMTP Server
1st SMTP Server - a free SMTP relay server- is a simplest, easy to use SMTP mail relay server. It is used for relaying your email messages to its destinations quickly and easily. Whenever you need to send large amounts of email from a mass mailing program like Advanced Emailer You can install...
http://www.emailarms.com/downloads/zip/fstsmtp.zip - 1Mb - Download - Screenshot

SMTP Spotter
With hotspots popping up everywhere, and for the typicial business traveller, email is a way of life today. Unfortunately, so is Spam. In efforts to control it, most ISPs now block the sending of mail from anywhere except on your own server.
http://www.desktopsolutioncenter.ca/SS_Setup.exe - 2Mb - Download - Screenshot

Free SMTP Server
Free SMTP Server is a SMTP server program for Windows that lets you send email messages directly from your computer. It's very simple but very useful for laptop users traveling around the world and connecting their PCs to different Internet Service Providers in different countries. ... Free SMTP Server is very fast, while sending, it establishes dozens of SMTP connections, and gets the most out of your Internet connection. ... Free SMTP Server supports all email programs like Outlook Express and Eudora, but best optimized to work with Outlook Express.
http://www.softstack.com/download/freesmtp.zip - 767Kb - Download - Screenshot