A fresh start with KMail

Hello list,

Having tired (many times :) ) of wrestling with KMail, I've decided to start 
again from scratch. Not only a new user account, but no import of old emails. 
I've created the folder structure and imported my filters, but I've no emails. 
This one may even be the first.

My reasoning is that something must be wrong with the store of emails I've 
built up over the years, to cause such mayhem. So: save it somewhere safe and 
start all over again.

-- 
Regards,
Peter.

Gentoo stable system, openrc-0.41.2
gcc 8.3.0, sys-kernel/gentoo-sources 4.19.66
QT 5.12.3, KDE frameworks 5.60.0, KDE plasma 5.15.5
KDE apps 19.04.3 incl KMail 19.04.3 (5.11.3), akonadi 19.04.3
dev-db/mariadb-10.2.22-r1, net-libs/webkit-gtk-2.24.2
x11-drivers/xf86-video-amdgpu 19.0.1
dev-libs/amdgpu-pro-opencl 19.10.785425-r1