Perhaps the one-click un-sub-scribe option described here:

 http://www.lsoft.com/news/techtipLSV-issue4-2005-us.asp  

would be of some use to you. It does not require the end-user mail
client to "do anything" except enable clicking a link in the message
body.

>>> [log in to unmask] 1/23/2007 3:12:21 PM >>>
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