Created attachment 58725 [details] screen shot of webmail that demonstrates problem Version: 1.13.5 (using KDE 4.6.2) OS: Linux First, let me say that this looks like a KMail problem; other clients like Apple's Mail (and Thunderbird IIRC) do not cause this problem. If I have my university's webmail client open at the same time as KMail (as an IMAP account), the problem shown in the attachment occurs. New emails appear twice in the webmail client (in purple ellipse in attachment). The second (grayed out) copy cannot be marked as read (see green ellipse in attachment showing one unread message) and will not go away until after I sign out of the webmail client (often I have to wait some time after that -- if I sign back in too soon they will still be there). I realize this might be a hard bug to fix because you probably don't have access to this webmail client, but -- because other mail clients don't cause this problem -- it does seem to be a problem with KMail and not with the webmail, so I think you should be aware of it. Reproducible: Always
Thus may be related to bug 139088.
Thank you for taking the time to file a bug report. KMail2 was released in 2011, and the entire code base went through significant changes. We are currently in the process of porting to Qt5 and KF5. It is unlikely that these bugs are still valid in KMail2. We welcome you to try out KMail 2 with the KDE 4.14 release and give your feedback.