Your use case is why I bought my own domain name. My wife and I create shared aliases we can both send from. It’s made spousal ensuing with schools so much easier, etc.
I used to get email for an org that had a similar domain as me (they had an extra letter in the middle). Thankfully, not a very big org, I would just bounce addresses that got a lot of misdirected email and I think they shut down and that really solved the problem.
Still annoying, but not as bad as gmail. I just got an email, in Italian, about someone adding a passkey to their ebay account. No way to tell ebay it's not their address / it's not my account.
Similar boat (~25 years) and, while I've run into some sites/services that rejected my domain, I'm pretty sure it's happened fewer than 5 times, total.
Still annoying, but not as bad as gmail. I just got an email, in Italian, about someone adding a passkey to their ebay account. No way to tell ebay it's not their address / it's not my account.