XCmail: unsubscribe - help

[Boris Legradic]

Hi! 
I once subscribed with the e-mail-adress of
"[EMAIL PROTECTED]". Now I want to unsubscribe, but our
mail-server is set up so that it looks like my mail comes from
"[EMAIL PROTECTED]" - which means that I cannot unsubscribe.
help.
thanks
Boris Legradic