[chrismorgan]

Catch-all is a pretty standard feature across email providers when you’re using your own domain.

As for +, I have no idea if it’s being blocked on purpose or by accident, but that kind of thing serves a useful purpose for the recipient, not just being able to create multiple accounts easily: automatic labelling. (And if you’re trying to create multiple accounts, plus addressing is an awfully prosaic approach, and there are plenty of other viable techniques, e.g. mail forwarding services, disposable addresses, adding random dots if you’re using Gmail—abc@, a.bc@, a.b.c@ and ab.c@ all go to the same mailbox.)