I heard VisualOffice has TMDA filtering. What is that?
TMDA is a technology designed to significantly reduce the amount of SPAM/UCE (junk-mail) received. TMDA combines a “whitelist” (for known/trusted senders), a “blacklist” (for undesired senders), and a cryptographically enhanced confirmation system (for unknown, but legitimate senders). TMDA strives to be more effectual, yet less time-consuming than traditional filters. With TMDA, unrestricted access to the user mailbox can no longer be assumed, a premise which spammers rely heavily upon. The way TMDA thwarts incoming junk-mail is simple yet extremely effective. The user maintains a “whitelist” of trusted contacts which are allowed directly into his/her mailbox. Messages from unknown senders are held in a pending queue until they respond to a confirmation request sent by TMDA. Once they respond to the confirmation, their original message is deemed legitimate and is delivered to the user. Updating the whitelist insures they won’t have to confirm future messages. TMDA can even be configur
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