Blessed are they who hit the “delete” key instead of “forward” when it comes to mean-spirited e-mails of questionable veracity, several Christian ethicists said. They suggested several guides: Administer the “smell test.” Christians should ask if any e-mail passes the “smell test” before passing it along, said Bill Tillman, T.B. Maston professor of Christian Ethics at Hardin-Simmons University’s Logsdon School…