It’s a script (in AppleScript) that goes through all Apple Mail filters and converts them to Sieve filters, so you could go server-side on email filtering
The answer is, as usual, “because I’m lazy” – I’ve accumulated a fair bunch of Apple Mail filters along the way, and converting them manually wasn’t much fun. And I found no working option to convert it on the Internet.
Code and disclaimer
Code is available at:
feel free to clone, submit your patches etc.
NOTE that this is validated with a quite limited use case – in my filters, I mostly match against subject and sometimes against CC/To, so it definitely has some issues with other fields. Please review / try loading the results first and don’t disable all your Mail filters right away.
Exporting Mail filters
Just run that script – it will ask you if you want to use disabled filters as active (useful to re-export after you have already disabled Mail filters), then if you want to disable Mail filters (useful when you’re certain in your Sieve filterset), and then where to save the results.
Was it fun?
Well… the answer is “look at the code”. On the one hand, writing in AppleScript is quite unlike writing in most of the “conventional” languages – some constructs are very different, some seem more natural, others more awkward. On the other, loops management reminded me of programming Turing machine – I mean, using THIS as “continue”, really?!
So to conclude – I think it was, as any unusual experience is fun in it own (however peculiar) way. And it’s the “proper way” for the case – you deal with official API, not parsing the XML (which I could, because Mail rules are stored in XML files) because there’s no way to foretell where the source would move or how its structure would change eventually. Mail API is way less likely to do so.
Some Sieve-related resources FTR:
Have a beer!