Simplify and expand the creation and maintenance of email filters.

The current creation system is extremely limited in options, and thinking that any ordinary user is willing or able to learn some obscure scripting (sieve) language to edit email filters is ludicrous. Instead of constantly adding new applications, however cool they may be, why not add some maturity to your existing products.

As an example, I would refer you to the email filter system in Thunderbird. It's not perfect, and it doesn't incorporate all of the suggestions your users have presented, but it is far more sophisticated and less daunting than the proton email filters currently in place.

I would suggest that, properly phrased, a request to lumo would provide a full featured system in a very short time.