How about foo@[1.2.3.4] ? "foo", ok, I agree with the blogpost, if there isn't even an @ in there somewhere, maybe it's sensible to catch that and reject it ou

How about foo@[1.2.3.4] ? "foo", ok, I agree with the blogpost, if there isn't even an @ in there somewhere, maybe it's sensible to catch that and reject it outright. But that's probably about it.