I am trying to send mail using MFMailComposeViewController. Everything works, except that mails do not get sent, and I always get MFMailComposeResultFailed.
Any pointers? I am NOT using the simulator, and sending mail does work from my device. I do have a connection (testing via Reachability), and [MFMailComposeViewController canSendMail] returns YES.
No compiler warnings in the project, no crashes…
It was a bug in IOS4.
I had both an Exchange mail account and an old, inactive IMAP account on my phone. Apparently, that leads to problems with iOS4. The mails actually were stuck in the outbox. Once I removed the inactive IMAP account, everything worked as expected.