I tried copying a list of folders from my Local account to my remote IMAP.

Simply put: this functionality is fully broken. Sometimes mails are copies, sometimes not. I can't rely on Akonadi/KMail. KMail/Akonadi state it has copied mails but as I observed no whatsoever network traffic, I got suspicious and checked the maildir folders on the IMAP server ... and there were some folders, some not. It seems that AKonadi/KMail stopped copying at a certain point.

However, the local Akonadi resources still claims, that these emails are on the server. KMail shows me all "copied" emails in full detail. But when I get on the Mail server via Webmail, there is nothing.

Clicking on "Update folder and its subfolders" does produce exactly 0 output and does not change anything. Re-copying the emails fails, since Akondai/KMail state that there are emails there (which they are not).

Imaging copying the emails from my Local Account to the IMAP and then deleting the local mails. This will result in a LOSS OF USER DATA!

I can't believe that this Akonadi implementation is that broke! I mean, it has been introduced way back in KDE 4.6!

That is a very pitty, since KMail has been an extraordinary cool and excellent email client. KMail2 is ... uhm ... "shiny" and leaves all competitors way beyond, if it had a working Akonadi backend. :(

Man, I could cry.

Reproducible: Always

Actual Results:  
KMail does copy some emails/folders some not. Though it claims all have been copied quite a list has not.

Expected Results:  
Simply keep up-to-date with the IMAP server: show what HAS been copied with respect to the values derived from the IMAP server AND NOT from the Akonadi bogus cache ... and ... btw: simply copy ALL emails on the server.