“The product aims to let users keep their mail local and under their own control rather than relying on Google, Microsoft, or another cloud e-mail provider. The crowdfunding campaign has exceeded its goal and things appeared to be going well for the company—until last weekend, when Mailpile’s Brennan Novak awoke to a notification that Paypal was canceling his debit card and freezing his Paypal account, apparently on suspicion of fraudulent activity. Paypal will be keeping the funds frozen for a full year or until they have a verifiable 1.0 release of their product. Alternately, Paypal said, Mailpile could provide Paypal with ‘an itemized budget and your development goal dates’ for the project.”
http://arstechnica.com/business/2013/09/paypal-freezes-45000-of-mailpiles-crowdfunded-dollars/