It's funny, I read all through that with my rose tinted glasses thinking they'd created a local IMAP server on the phone, which would have been clever (and, I think, doable)... in fact I was running this perception until
"Our proxy server is written in Ruby using EventMachine, which allows it to efficiently handle many concurrent IMAP connections"
And I thought, why the heck would one phone be issuing so many concurrent IMAP connections. Oh my naiveté.
"[iOS 7] opens many IMAP connections at once for searching each folder concurrently. We’re not sure on the upper bound on the number of connections it will make, but saw at least 10 in one case."
And I thought, why the heck would one phone be issuing so many concurrent IMAP connections. Oh my naiveté.