[Users] sometimes claws forget the read-status of messages

[Paul]

On Mon, 1 Aug 2016 12:42:51 +0200
<c.buhtz at posteo.jp> wrote: 

> And when it doesn't work I'll try to delete all .claws_cache
> and .claws_mark files as Andrej mentioned

Andrej didn't mention deleting them. I can't see how that would be
any solution to your problem. It looks very much to me like a local
problem. If you can find out what you're doing to cause this then you
can find out how to stop it. (I have never had this problem.)

with regards

Paul