Spammers are quite sophisticated at using phony addresses and domains which don't really exist. Mail is illegally forged through a gateway making it appear that the spam mail is coming from one server when it has not. It is smoke and mirrors and in effect hides the spammer from view. The spammer is taking advantage of the system and can give a legitimate ISP a bad reputation. The company plans to release BlocAide within a few days.
Pricing varies according to configuration and volume of mail servers.
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