I run Apple Mail on all platforms: Desktop / MacBookPro / iPad / iPhone and this "sent mail disappearing" exists on ALL to an extent. I've tried rebuilding mailboxes, opening only the folder on the iPad/iPhone from the account used to send the email...NO JOY. When I go to gmail via a web browser, the email is in the sent folder.
Obviously, there are some MAJOR bugs in Apple Mail. Has to be...otherwise, there wouldn't be such consistent problems regardless of platforms.
I know the mail isn't lost or not sent...it just isn't ALWAYS getting stored on the actual device that sent it.
Does anyone have a better email client? I have about 10 active email accounts...and use them all every day. Help!! (I am not returning to Outlook under *any* circumstances!)