FRAMINGHAM (11/07/2003) - E-mail software maker Sendmail Inc. is partnering with software company Cloudmark to provide integrated anti-spam features for companies using Sendmail e-mail products. Cloudmark's Authority enterprise anti-spam technology will be integrated with Sendmail message-transfer agents, giving Sendmail customers a plug-and-play, anti-spam technology. Sendmail, which also is available as open source software, is one of the most commonly used enterprise e-mail platforms. Cloudmark's products use a Microsoft Corp. Outlook anti-spam plug-in called SpamNet to maintain a distributed, 700,000-person, peer-to-peer anti-spam network. Sendmail's decision to partner with Cloudmark comes after a number of similar announcements by other enterprise messaging and e-mail security companies.