" You can put the same kind of GUI or web interface on top of a Sieve file" From a quick google, there does seem to be a Roundcube plugin for managing Sieve fi

" You can put the same kind of GUI or web interface on top of a Sieve file" From a quick google, there does seem to be a Roundcube plugin for managing Sieve filters, but man yet another dependency (or two, as it seems you need a separate daemon as well) in an already brittle (by the time you get to this point) stack... Look, I understand where you're coming from, and I used Sieve for many years, but it's 2019 - something is not an 'Internet standard format' when the number of users actually using it can be expressed with 4 or 5 digits at best... This horse is not just dead, we're snorting its ground up bones by now. Nobody caters to power users any more. Back when power users made up a sizeable portion of the internet population, yes, but not in 2019...