febooti Command line email 

Utility to send email from command prompt; send attached files, plain text or HTML (with embedded pictures). Supported - TO, CC (Carbon Copy), BCC (Blind Carbon Copy), alternate text for email programs that do not support HTML messages, text encoding
command line email command line mail command line mailer command line e-mailer command line smtp scheduled email send email command line html email automatically send e mail

KingMailer 

Mass, Bulk mailing. Built-in SMTP Engine. Multi threaded. Direct mail delivery. 300 mails at a time. HTML & text. Attachments. Auto Image embedding. Personalizing. Auto unsubscribing. profiles. Only 260 kb. Just download and run. No installation.
mass mailer bulk mailer mass bulk mailing list smtp mail email e-mail outlook mailer smtp mailer direct mail

xTang 

xTang is a fully windows explorer integrated mail program with html-mail support, spam protection, spell checking in 20 languages and easy to use message rules. Includes routines for converting from your old mail program to xTang.
e-mail. explorer integrated spam protection