While the process does not need to be exactly as described in the original post, I was extremely surprised to discover I could easily add a new email address to an existing filter. My expectation was that when I clicked "filter" on a single email address I would be able to select one of my named filters from a dropdown list. Honestly, had I thought it was possible an email program *didn't* have this simple feature, I would have looked for it before migrating over and possibly chosen a different email program.
While the process does not need to be exactly as described in the original post, I was extremely surprised to discover I could easily add a new email address to an existing filter. My expectation was that when I clicked "filter" on a single email address I would be able to select one of my named filters from a dropdown list. Honestly, had I thought it was possible an email program *didn't* have this simple feature, I would have looked for it before migrating over and possibly chosen a different email program.