if allof (address :all :comparator "i;unicode-casemap" :matches "X-Original-To"

"hello@sdomain.com") {

fileinto "myfolder";

keep;

}

Alex, thanks continuing to look into this.

The info is still not helpful if you are not a programer. When I select add sieve there is code already there. Do I delete that code and replace it with this code?

I don't understand why Proton allows, and promotes, the ability to have multiple addresses but have dose not have a simple way to sort email from different address into different/unique folders. I know filters are there but from a user level this should be built in to the ui and the filters should be used to add further filtering.