catherinefromgla wrote:
"I have just received this email from the IOS Sr Tech Advisor who has been dealing with my case.
Quote - I am tracking your case and this issue.
This appears to be a variation on this issue. IOS Mail caches the email, and then that cache may clear when space is needed. It will then download them ags again from the server.
Today we released IOS 9.1 for the iPhone with a POP bug fix, I would ask you to update to this version and let me know if the problem persists so I can follow up with our engineering department.
Unquote
I am now installing the iOS9.1 update with fingers crossed. The comment you received re caching email doesn't seem right though because whatever messages reside on the server would be of no consequence to messages that were lost from the Sent mailbox. Let's hope that was an unclear explanation and the iOS9.1 update does the trick. Good luck.