title: MailCore2 Alternative
body: <p>I've spent a great deal of time creating an Objective-C based application for the iPhone.  I incorporated MailCore2 so that emails could be sent without a dialog popping up (Apple's system of in-app email).  My app works perfectly on all of my devices, including all outside devices associated with TestFlight beta testing.  Unfortunately, the moment Apple reviews the app, they always reject it, saying that MailCore2 made an AlertView with the contents: "Error! Please connect to the internet or try again later.", and the email never properly sends.</p>
  
  <p>My question is, is there an alternative to MailCore2?  I've heard of MailGun, but I see no documentation on their site for either Objective-C or Swift.</p>
  
  <p>Thanks in advance to all who reply.</p>