Cloudmark Desktop is good at stopping spam, but it offers fewer features than either Qurb or MailFrontier.
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Security provider Cloudmark continues to see more spam e-mails with fake notices promising an upgrade for Adobe Reader but instead trying to get users to provide their credit card info.
Sendmail, whose technology shuttles nearly 60 percent of e-mail on the Internet, agrees to make Cloudmark's antispam filtering tools a centerpiece of its commercial mail management software.
The computer-security maker will bundle antispam software from Cloudmark into its product mix, both companies are expected to announce.
Anti-spam company Cloudmark on Wednesday is taking the wraps off a new spam-fighting tool that aims to use the power of the people to weed out unsolicited commercial e-mail.