Which was fine until I had to verify my identity in-person at a Verizon store to cancel service and had to explain why I wouldn't be able to receive a verification email to verizon@mydomain for a while. Also annoying for my 401(k) which uses SMS for 2FA and makes the codes expire after 2 minutes.

Since then I've switched to a custom domain with iCloud, which unfortunately doesn't support catch-all addresses at all, but is more reliable and faster.

This is what has finally ended my years of Microsoft Office use: Outlook will not let you keep your primary address out of smtp headers. No way, no how.

> Word of advice for anybody doing this: make sure you have a way to SEND email using one of your aliased addresses

So a) you need a mua like thunderbird that let's you set FROM header - and b) your domain need to be setup to allow your smtp server(s) to send from your domain (sfp).

The custom From is just a way to send from any address for that catchall, I was not suggesting to use it to send from abitrary addresses, which would be quite pointless since you then wouldn't get the replies.