A shot in the dark: have you tried closing KMail, issuing the command:

 

akonadictl restart

 

and restarting KMail? This solves my problems, which are admittedly different from yours and caused by Akonadi, but it's worth a try.

 

 

 

On Friday, October 21, 2016 10:05:15 AM CEST Timothy Murphy wrote:

> Sometimes (about one time in three)

> when I open KMail the message window is in a strange form.

> Most of the entries in Inbox are threads,

> I cannot change the date order by clicking on Date,

> and the Subject, From and Date columns are squashed together on the left.

>

> Basically, KMail in this state is unusable,

> as I cannot access recent messages.

>

> Closing KMail and re-opening it does not improve metters.

> Logging out and in again occasionally works.

> But usually I have to re-boot to get KMail back into normal form.

>

> Is this part of the KDE/KDEinit bug(s) I've been reading about?

> Any suggestion of a quicker way to return KMail to normal form?