Safe Lists, Mailers & List Builders Page 1 - Free Advertising
Safe lists, list builders and mailers are email marketing sites where its members check email messages from each other to earn credits. These credits are used to send from hundreds to thousands of emails back to others. In a sense, these types of advertising sites are pretty much like traffic exchanges. However, members get to choose whichever site they want to visit (after reading its email message), instead of looking at random ads one after another. For this reason, I believe that safe lists, list builders and mailers give better results for sales and signups while TEs are better suited for exposure and branding.
'Free HTML' means that free members are allowed to send email messages with HTML coding -- a feature usually offered to upgraded members! HTML messages often have a better click-through rate than simple text messages.