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.
> 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).
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.
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.