I think it’s a major feature gap that Gmail (paid or free) cannot create filters on headers.

I also can’t do wildcard filters on “to” or “from”. For example, in my GApps I have it set up to route all emails not associated with a specific user to my primary user. So that it’s easier to make throwaway emails. I want to filter all to:`X.X@domain.tld` to a certain folder. No can do.

It just feels restricted.

> I want to filter all to:`X.X@domain.tld`

You can filter based on the to: field, yes.

For many years I’ve been creating filters on free Gmail for to:, from:, subject:, etc. I set them up on desktop web.

Perhaps there is something more specific you’re trying to do?

> a major feature gap that Gmail (paid or free) cannot create filters on headers.

You can create filters on header fields like from:, to:, and subject:, so I am guessing you mean something different than “cannot create filters on headers”?

This so much this. Gmail overall is pretty meh and then it has these stupid footguns that make it awful.