I have an imap account with different maps.
Due to the multiple apparatus I had two folders with sent item, the folder SENT and SENT MESSAGES.
I migrated all to sent message and directed in my iPhone and iPad the folder sent items towards the sent messages via settings for that specific account.
This resulted in all sent temsin one folder. On my MacBook Pro and iMac I have all sent items chronically in the sent folder.
The problem is that in the iPad and iPhone I miss for about 1,5 year of sent messages....only the last four sent items are now listed.
I have deleted my account on the iPad and build it up again, and still I miss all those"lost" mails.
Who knows the solution for this problem??