Comment 25 for bug 862483

I have exactly the same problem. I am unable to read ANY of my emails !
stop/start akonadi, kmail, linux reboot does not improve anything.

This is a VERY SERIOUS PROBLEM rendering kmail unusable.

Error messages in mysql.err are :

ItemRetrieverException : Unable to retrieve item from resource: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken