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In addition, Total Control includes an on-the-fly e-mail address option, so a user who visits a Web site and wants to sign up for e-mail alerts can create a new address for entering into the Web form. If an organization other than the Web site e-mails the user at that address, the user knows it has probably been shared without authorization and can block it accordingly, Hughes says.

When it comes to blocking spam, Total Control works, says David McCary, a founder of McCary Stevens Associates, commercial mortgage underwriters based in Hartford, Conn. Before signing up for Total Control the company had no spam-blocking in place and was "getting crushed," McCary says. Now the 20-person firm gets no unwanted messages.

The service's downside is that it's hard to explain and understand, he says.

"It really took me a while to get comfortable with the concept; it's very different from everything I've read or experienced," McCary says. "Now that I'm a year into [using] it, I can really appreciate how unique and effective the approach is."

With Version 4.0, Reflexion has included Mailshell's content filters and integrated a range of whitelists that specify approved IP addresses. Reflexion has added these features because the company believes the more layers of spam protection a company uses the better, Hughes says.

For an organization with 1,000 users, Total Control 4.0 is priced at $15,000 for the first year, $7,500 for the second year.

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