> Validating against the RFC is somewhat complex though. Hence, not obvious :-) If there is one thing we can learn from all the misguided attempts at validati

> Validating against the RFC is somewhat complex though. Hence, not obvious :-) If there is one thing we can learn from all the misguided attempts at validating email addresses that we have seen over the years, it is that it is obviously not obvious which email addresses are syntactically invalid.