I set up a new Gentoo system and encountered the following bug in
Kmail2. Everytime I move an email from, say the inbox folder, to some
other folder the email is moved correctly, at least initially. However,
upon switching from to inbox folder to another folder and then back
to the inbox folder, the harddrive is accessed and the email is recreated
in the inbox folder resulting in two copies of the same mail in different folders.
This behaviour is reproducible every time.

Here is some more precise information about how I set up the machine. Maybe
its helpful.

1) Installed KDE SC including KDE-PIM suite from gentoo's stable portage tree
2) started KDE and set up Akonadi resources, namely 4
"POP3 Email-Server"-resources
3) started kmail2 and imported messages from a backup

Curiously, the behaviour described above only applies to newly received
emails. Emails from the backup are not affected.

I already filed a bug report but since this is quite an obvious bug and I have found
nothing about it on bugs.kde.org, I suspect that there might be something wrong with my
setup. Anyone got any ideas?


Oh btw: I'm using KDE 4.8.3

The same problem exists in kmail-4.9
It only happens with mail from mailing lists (I have only pop3 mail)
So how did I solve it:

don't use MOVE
but:

copy message
+
delete message



--Kees

Last I checked the duplication is completely cosmetic. The mail is not actually stored twice. Once you do some kind of operation on one of the mails (eg. mark as read), the dupe disappears.

The problem isn solved in 4.9.1

@KAMiKAZOW: it does not help if it is "only" cosmetical. I don't read all email immediately after it is received, so those emails still act as dupes. And when moved to another folder, they should not be readable in the inbox anymore.