A spam filter software specifically designed for global Chinese users, capable of accurately identifying emails in various languages including English, Japanese, Korean, Traditional/Simplified Chinese, and has the ability to block harmful links from advertising service providers.

Upon installation, the software already comes pre-configured with a flexible rules engine that uses heuristic logic to identify spam. Furthermore, the 'fuzzy logic' engines of this software are incredibly effective in filtering spam while ensuring that legitimate emails don't get blocked.
Spammers often use various combinations of words to trick the system, such as "vi@g0ra!", "XAN3A.X", "via gra", "V1AgR@", "V.ia_gr^a", "V.I.A.G.R.A". However, with the Letterman software, users can rest assured that these techniques will be caught and eliminated every time. In fact, this software guarantees 100% filtering accuracy against such cunning spam techniques.
Version 3.5.281: Freeware Version.