From: Brad Templeton (brad@clari.net)
Date: Wed Nov 05 1997 - 15:30:52 CST
Word is that the domain ".invalid" as a top-level-domain that will
never be valid, has been added to the IETF TLDs draft, so we should
use this as the form for an invalid e-mail address. It allows
a range of addresses, and no software will break on it, other than
letting people send waste of time mail if they don't recognize it.