How do I set the from address in the MFMailComposeViewController
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MFMailComposeViewController *controller = [[MFMailComposeViewController alloc]
As far as I know, it's not possible. When the mail composer is open, you will be able to fetch the "from" field from the list of e-mails configured in the device, and the user selected default will be initially set.
I know that it would be useful to know the list of available "from" accounts and set the composer with a more appropriate user choice. Probably Apple doesn't want to give the app this possibility. You might open a "radar" with Apple, e.g. adding a special view controller to let the user define a different default address for the specific app, this would be a nice addition to the iOS.