Mailgun, a Y Combinator-incubated email delivery service that was acquired by Rackspace in 2012, today announced that it is being spun out of Rackspace and that it has raised $50 million. Rackspace itself, of course, is going through a transition period now that it has become a private company again and given that email delivery isn’t … Continue reading Email delivery service Mailgun spins out of Rackspace and raises $50M