All the purported reasons for FB doing this seem topsy turvy to me. Sacrificing the experience of the majority for the sake of the minority. I mean, why not us

All the purported reasons for FB doing this seem topsy turvy to me. Sacrificing the experience of the majority for the sake of the minority. I mean, why not use @startupmail.com for your personal addresses and have your app use @startup.com? You can set up aliases like fred@startup.com so the obvious guess-address still works, but this way your users don't end up asking "is this legit?", your corp emails still won't get blocked for spam, etc. I really dislike the UI of sending app related emails from a different domain. It's an ugly solution to what may be a non-problem, and if there really is a need to separate corp from app addresses, treat your app as the number one priority. Use gmail for your corp correspondence if you have to.