I've used migadu.com for well over a year now and been very happy with them. They let you setup multiple regex based catchalls, so I can create any address pref

I've used migadu.com for well over a year now and been very happy with them. They let you setup multiple regex based catchalls, so I can create any address prefixed with shop and have it forwarded to one address, while ones prefixed with game get forwarded to another. If you aren't planning on sending any emails from the domain, their free single domain plan might work very well for you.