> Maybe "joe@bob.com" gets marked as spam in the mail client but not if it's from "Google+", etc.
I'm assuming they're just changing the display name on the email, rather than the 'From:' email address itself.
That is, instead of "Tabule <no-reply@tabuleapp.com>", it's now "John Smith <no-reply@tabuleapp.com>". The email doesn't get marked as spam because it's still claiming to be from the server that sent it, and it has the appropriate MX records and those sorts of things.
The thing that worries me with that approach is overzealous "add to address book" functionality. I don't want to be clicking "John Smith" in some dropdown and have it go to some noreply address at some third party.
I personally solve this by typing in full email addresses and memorizing my friends' email addresses, but I gather that's not how the world at large works.
I'm assuming they're just changing the display name on the email, rather than the 'From:' email address itself.
That is, instead of "Tabule <no-reply@tabuleapp.com>", it's now "John Smith <no-reply@tabuleapp.com>". The email doesn't get marked as spam because it's still claiming to be from the server that sent it, and it has the appropriate MX records and those sorts of things.