Zumbox, which is developing an electronic delivery service for bills and marketing material, has raised an additional $9.7 million in equity funding.

The private Westlake Village company said in a regulatory filing late last week that it began selling the stakes Dec. 10 but did not name the investors. Past investors have included former Walt Disney Co. Chief Executive Michel Eisner of Tornante Co., Art Bilger of Shelter Capital Partners; Rick Braddock of Fresh Direct, and Bill Guth of Guthy-Renker.

The company, whose chief executive is former Stamps.com CEO John Payne, touts its product as an eco-friendly and cheaper alternative to paper mail. The company has created a digital mailbox – a Zumbox – for every street address in the country. Messages can be sent as digital files and received online, with no paper, printing or postage, and no scanning.

The Zumbox service, which is in beta testing, is supposed to allow marketers and businesses to target individuals with electronic mailings, based on their street address. However, people would have to create their own “Zumbox” to get their mail, which could include electronic bank statements, car service reminders and marketing material commonly known as junk mail.