On Fri, 9 Oct 2015, Christopher Morrow wrote:
fairly certian that nothing ip-echelon sends is ever valid... or there's enough 'clearly you are joking' mail from them that anyone who ends up in court for 'ip echelon violations' could simply subpeona their isp for 'other complaints from ip echelon' and show the judge: "Clearly these folk are on the good crack, case closed due to reasonable doubt."
procmailrc is your friend. however far your lawyer lets you go.