After two high-profile encrypted email providers announced they were shutting down, Kim Dotcom’s Mega has responded by throwing its hat into the ring. The new email service is being built upon the same end-to-end encryption that Mega now uses to protect the privacy of its filesharing clients.There are some sizable hurdles to overcome in launching such a service, of course. Mega has to make sure that its new service is every bit as usable as vanilla webmail. That means making sure users can search the contents of their inboxes and that email from non-encrypted contacts is handled in a secure fashion.The boisterous Dotcom isn’t concerned. He’s as defiant as ever, and thrilled about the “exciting work” his team is doing to protect user privacy. But can Mega succeed in the wake of two big-name services shutting down?Both Lavabit (NSA leaker Edward Snowedn’s email of choice) and Silent Circle called it quits this week. Pressure from the U.S. government is believed to be the motivating factor for Lavabit. Company founder Ladar Levison blogged that he had to “walk away from nearly ten years of hard work” in order to avoid becoming “complicit in crimes against the American people.”Less than 24 hours later, Silent Circle admins decided “the writing was on the wall” and pulled the plug. Its servers have been physically destroyed. “Better to take flak from customers rather than be forced to turn it over,” said CEO Michael Janke.Dotcom says it will take a few more months to put the finishing touches on Mega’s encrypted email service. The company “will never launch anything that undermines its end-to-end encryption core,” he told ZDNet. He’s already proven that Mega could rebound from what looked like a a cataclysmic event. Surely he and his team can deliver a secure email service that can survive a little government scrutiny.