http://www.troubleshooters.com/linux/cl … wstips.htm

It works nicely in Jessie, however, in Ascii there is a problem where the HTML display plug-in "fancy" just displays an empty white page for many HTML messages. I eventually found a mention of this problem, which seems to be associated with the mime database. They give a workround :-

http://www.thewildbeast.co.uk/claws-mai … gi?id=3644

Which also refers to :-

https://bbs.archlinux.org/viewtopic.php?id=211484

The solution given is to remove ~/.local/share/mime/packages/user-extension-html.xml

and then run

update-mime-database ~/.local/share/mime

There is a suggestion that removing this entry from the mime database might affect some other software, so it is best to move the file somewhere safe, rather than just deleting it. I have my own sub-directory "src" and have put it there.

cd ~/src/claws
mv ~/.local/share/mime/packages/user-extension-html.xml .
update-mime-database ~/.local/share/mime 

I don't know whether it was necessary, but I restarted Claws and then HTML messages could be viewed OK.

Geoff