Softabar Command Line Email Client   
http://www.softabar.com

Softabar Command Line Email Client is a tool for email automation. Use this tool to send, receive and monitor email, directories and files from a command line and from scripts. Features include: * Send mail from scripts using SMTP.* Send attachments, HTML mail with inline images, multiple recipients and more. * Receive mail using POP3. * Monitor file, directory and email. * List mails in inbox, reply and forward mails. * Email shell. Send commands from web email and receive command output as reply. * Socket server. Use telnet or custom client to send emails. * Easy install. Unzip distribution file to a directory. * Customizable * Source code option available.

eMailer   
http://www.utilstore.com

Personalized group mailer with built in SMTP client. Sends personalized mails to a list of recipients in a group list. Contains an html WYSIWYG editor, with support to a wide range of emoticons(Smileys). Smileys can be added dynamically. No need of any email accouts to send mail. Use any email address as the from address. eMailer talks directly with each of the recipients SMTP servers and delivers personalized mails to each. Can be used as a subscription mailer. Any number of subscription lists can be configured. eMailer also allows you to use your own SMTP server, so that the mails are routed through it.

VanMail   
http://www.vandaveer.com

VanMail is a powerful POP3/SMTP email client that allows you to manage your email with ease. With VanMail's powerful built-in SPAM protection, you control the emails you want to receive. VanMail comes with a powerful rules based system where you can create rules to block emails, whitelist rules (i.e. never block), auto-response rules, alert rules, etc. VanMail also comes with an advanced challenge-response system. You can even configure VanMail to encrypt your downloaded email so that others who have access to your system can't read your email.

Advanced Mailbox Password Recovery   
http://www.elcomsoft.com

A program to recover login and password information (stored locally) for most populat email clients: Microsoft Internet Mail And News, Eudora, TheBat!, Netscape Navigator/Communicator Mail, Pegasus mail, Calypso mail, FoxMail, Phoenix Mail, IncrediMail, @nyMail, QuickMail Pro, MailThem, Opera mail, Kaufman Mail Warrior. Also includes POP3 server emulator that allows to get POP3 password from ANY email client. Passwords are recovered instanly, multilingual ones are supported.

yMail   
http://www.spacejock.com

yMail can be used as a spam cleaner for your existing email setup, and also as a standalone email client. yMail's spam filters use Bayesian techniques. You can show yMail which messages are spam and which are not (before you even download them to your computer!) and each time will adjust its filters to suit. After a few days, it will be able to sort mail quickly and efficiently without any input. yMail can also be used as a mail scanner - you don't have to use the email portion of the program, just use yMail to preview and automatically delete spam before downloading into your regular email software. Free software from the author of the Hal Spacejock series.