I reinstalled my OS and was setting up mail and spamsieve as normally. It worked at first but then I saw that Mail’s junk function was still enabled so I disabled it and after that it keepes crashing when I open mail. I tried to see if I could reinstall etc but not easy.
and I don’t know how it got there, because SpamSieve has never installed into the top-level Library folder. Deleting the second plug-in should stop the crashes.