I’ve been using Airmail on a Mac computer for a long time, together with SpamSieve to filter mail. It’s built a corpus that suits me very well. Now, I’d like to migrate away from Airmail and into Thunderbird, on a Windows computer. SpamSieve has an “export” function that creates a .plist file.
Is there a way to import this into Thunderbird? I wouldn’t like to lose all these years of spam filter training.