Cloudmark, a provider of messaging security solutions, has scored a massive $23 million funding round led by new investor Summit Partners and joined by Nokia Growth Partners, the mobile giant’s venture capital investing arm. Existing investors Ignition Partners and Industry Ventures also participated in the round, which is the first financing Cloudmark has closed since 2004, when it raised $11 million from multiple VC firms. The new funding is said to have been used to assist in Cloudmark’s acquisition of former rival Bizanga.Cloudmark’s specializes in spam, phishing and virus protection software for wired and wireless networks. The company, founded in 2001, claims to currently protect over one billion inboxes in over 190 countries around the world. Cloudmark says it counts over 100 of the world’s largest service providers, including more than 75 percent of all major service providers in the United States and Japan, among its customers.On its impressive client reference list: Cablevision, Comcast, Cox Communications, EarthLink, Swisscom, Tele2, XS4ALL (KPN), as well as social networking company MySpace. Cloudmark is privately held, is headquartered in San Francisco and boasts offices in London, Tokyo, Beijing and Hong Kong.CrunchBase InformationCloudmarkInformation provided by CrunchBase