If you’re like some of us, you filter the bejesus out of your mail. Being the postmaster recipient for an organization with under a thousand users, I get a little bit of mail.
So some of the claws-mail rules that I use, I wanted to move to folder rules. Some others I wanted to stay in filtering to run automatically. Ultimately it meant I was going to have to copy a crapload of rules into vim and paste them back and forth.
Fortunately, claws-mail stores all of its rules crap in ~/.claws-mail/matcherrc
So I shut down claws, edit the file and move everything where it needs to go. Firing claws back up showed that I had everything exactly how I wanted it.
I’m pretty new to claws but this was just a godsend. I had a lot of rules that needed to move.