> so it’s impossible without doing DNS lookups to figure out whether someone’s mail provider actually thinks johndoe and john.doe are distinct. The author has

> so it’s impossible without doing DNS lookups to figure out whether someone’s mail provider actually thinks johndoe and john.doe are distinct. The author has announced they believe them to intentionally indistinct and has announce an intent to break handling for any mail servers that consider them unique. All on account of gmail ignoring them? This coupled with their author's intent around + makes me loathe this behavior.