URL Domain Blacklist effective spam filter.

Ipswitch, Inc. has identified the URL Domain Blacklist as the most effective and consistent spam filtering technology. According to Ipswitch, more than two-thirds of all spam can be qualified as deceptive, typified by spammers disguising their illegitimate links behind unrelated graphics and pictures, or by camouflaging their site as a commonly used consumer e-tail site.

The URL Domain Blacklist filter in Ipswitch IMail Server unmasks illegitimate spam messages by looking at the actual underlying link and comparing it to a growing list of more than 18,000 repeat spammers. Since the blacklist only tracks recognised spam sites, this filtering technique virtually guarantees users a zero percent false positive rate. The URL Domain Blacklist is the most powerful technique in Ipswitch's anti-spam arsenal, which includes 20 unique filters, including Bayesian Statistical filtering, Reverse DNS Lookups and SMTP filters, among others. Ipswitch proactively searches out and identifies spam sites to broaden the reach of its URL Domain Blacklist by propagating false email addresses across the Internet, and the software provider delivers bi-monthly updates to all Ipswitch IMail Server users.

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