Anti-spam enabler Mailblocks Thursday unveiled plans for a new, free ad-supported Web-based email service that enables consumers to manage, protect and consolidate email from existing services
provided by Yahoo!, AOL, MSN, Hotmail and POP3 into one universal inbox. The free service, which features an impressive 5 megabytes of free email storage, also utilizes Mailblocks' patented
challenge/response spam filtering technology. In a related move, Mailblocks said it retained Adtegrity.com and ValueClick Media to sell inventory on the new ad-supported email service.