When I try to move or copy (easier for testing) a mail from one IMAP account to another the mail is lost or kmail is no longer able to open it. Reproducible: Always Steps to Reproduce: 1. Choose a mail in an IMAP folder and copy it to another IMAP account. Actual Results: An error message "unknown systemflag" pops up. The new message is displayed but when I try to open it, it disapears (mostly) or the message is not readable. Using a web login does not show a message at any step of the process. Expected Results: The message is displayed corret in the second IMAP folder as well. I am using kde 4.12.1. This happens only using some providers for example gmx/web. Copying a draft from local folder works in all cases. Copying a mail from IMAP to local folder works, but copying to the second IMAP account also fails. (I am not really sure this is related to kmail, maybe akonadi?)
An error message in observed in KDE 4.11.5 as well, but the mail is not lost. In addition the "unreadable" mails are not shown in this version
This bug has only been reported for versions older than KDEPIM 4.14 (at most akonadi-1.3). Can anyone tell if this bug still present? If noone confirms this bug for a recent version of akonadi (part of KDE Applications 15.08 or later), it gets closed in about three months.
Just as announced in my last comment, I close this bug. If you encounter it again in a recent version (at least 5.0 aka 15.08), please open a new one unless it already exists. Thank you for all your input.