From: "C. Harald Koch" <[log in to unmask]>

   This is my last word on the subject. After all, the only legitimate recourse
   I have is to recommend that my correspondents switch to other, less
   draconian, service providers, and I've already done that.

Actually, you have another recourse, which is to fix your mailers to
follow RFC 1123's statement that mailers SHOULD NOT create an RFC-822
header containing an address with an explicit source route.....

                                                - Ted