Rex Dieter wrote:
But I have worked out that the cause of the problem is that there exists a kind of ghost folder, "uidvalidity", which is listed among the folders on the kmail page but does not in fact seem to exist in my maildir on the server.
Deleting the folder under kmail has no permanent effect; it simply re-appears when I re-start kmail.
I assume the folder is listed in some way in the dovecot.index ; and my question really is: if I delete this index file will it be re-created automatically?
This bug/feature seems to have been present for years, which I suppose is par for KDE.
Years? Bugs filed? If so, where?
At random, here is one from 2006: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=364953
When I google for "Error while getting folder information" I get reports going back for several years, without, as far as I can see, any clear resolution or even explanation.
Could very well simply be a bug in dovecot and/or incompatibility between dovecot/kmail.
Well, it seems to occur equally often under courier-imap .
I have solved the problem in my case, without understanding it.
KMail appears to show a folder, College=>inbox=>uidvalidity But I don't find any such folder anywhere in ~/Maildir/ . I've no idea if this phantom folder should be present, and if so what it means.
This folder had the setting, "Include this folder in mail checks". After unchecking this box (which I did not check in the first place) the problem goes away - I no longer get an error/warning when I Check Mail in KMail.