That died about 15 years ago :) ... <HTML><BODY><BIG><B>Sender Address Authentication</B><BR><BR></BIG> This email address is protected by a system that requires a simple, one-time authentication of new senders.<BR><BR> To authenticate your email address and immediately deliver your email, <A href="http://m.USGOauth.net/_val?:cleared-this-variable-so-it-isn't-resent">click this link</A><BR> <BR>There is no need to re-send your original email as long as you click the link within one week.<BR><BR> If you have trouble making the link work, please notify system administrators by replying to this email.<BR><BR> Refer to the message headers below if you have questions about the authenticity of this notification.<BR><BR> ===============================================================================<BR><PRE> Date: Wed, 18 May 2016 17:49:57 +0000 From: Chris Wopat <wopat@WISCNET.NET> ... LISTSERV didn't catch this unfortunately. I have released the email in question. I really didn't think anyone used callback verification anymore and was surprised. -- Mike Horwath, reachable via drechsau@Geeks.ORG