I have a first.last email, but it's created quite the interesting situation. Turns out some dude in Australia has the same first+last name as me, and he's been using [email protected]. As far as I can find from Google's documentation, the email with no dots should be the primary and the one with dots an alias, but I'm guessing because I registered mine ages ago (back in 2006) it takes precedence. I have no idea how he hasn't noticed that his gmail emails are going to another inbox - maybe Google delivers them to us both or something? Regardless, I've gotten very personal emails (like from his therapist) and tried to reach out explaining the situation and asked these parties to let him know he needs to stop using that email, but to no avail.

Honestly the one who is at fault here is Google. If first.last and firstlast are treated as aliases, they straight up should not allow people to create them once the first exists, rather than just send emails to someone else. I've tried to respect my Australian brother's privacy (like not reading his therapist's emails and such), but not everyone is gonna do that.

A bit off topic, but changing your name when getting married is so strange to me. It is not at all common where I live (Belgium), in fact I don't think I personally know a single person who did.