Kmail2rc - is there a program to validate the syntax/config data in it?

Hi

I'm trying to find a reason for kmail 5.3.0 crashing at will on my system. I 
searched for a "fasttop" error in bugs.kde and found a 3 year old one closed 
so i looked through it and otehr referenced bugs to see if i can get any 
hints. One said to delete kmail2rc so i opened in kwrite first to look at it 
and got this message from kwrite:-
"The file ~/.kde4/share/config/kmail2rc was opened and contained lines longer 
than the configured Line Length Limit (4096 characters).
The longest of those lines was 6625 characters long"

Does this indicate there is something wrong with the syntax/config in this 
file?

Regards

Ian

-- 
Qt: 5.6.1
KDE Frameworks: 5.25.0
kf5-config: 1.0
KDE Plasma: 5.7.4
Kwin5: 5.7.4-152.2  
Kernel: 4.7.2-2-default
opensuse:tumbleweed:20160905
Nouveau: 1.0.12-1.4