Digital postal mail startup Zumbox announced that it is shutting down, as first reported by Matt Swain of InfoTrends. In an email sent to its users, the company recommended exporting their digital files by April 14, according to TechCrunch.

Part of the email from the Zumbox team read: "We are sad to announce today that after more than five years of working to revolutionize the way mail is delivered, we have made the very difficult decision to shut down the company. All of us at Zumbox, along with our partners and the mailing community, remain committed to the concept of digital postal mail and have great confidence this capability will one day be the way you receive and manage your postal mail. However, at this point, the time and cost required to deliver on the vision is more than the market is prepared to invest."

Zumbox is not alone in this shutdown. In January 2014, its rival Outbox also announced that it will close down its service, the report added.

Founded in 2006, Zumbox had initially earned high expectations from many people. The startup had raised a total of $28 million in funding, TechCrunch reported.