":-)Liz" wrote:

It happens all the time on my music newsgroups - if in doubt, before
replying to a post I check the full headers.  (Which, SFAIK, tell you
the true source of the post - domain, anyway.  You can put whatever you
like in the "identity" box of your browser (I'm always forgetting to
remove the "no spam" before I send private e-mail, and some of my
friends aren't smart enough to remove it from the return address before
they reply).  However, I don't think you can alter the ISP from which
your message actually originates.  Maybe "remailers" disguise it, but
the very fact a message comes from a remailer makes it suspect, doesn't
it?

Also, many spammers use other addresses than their own to avoid the
inevitable "undeliverables" from clogging their own mailboxes.  I'm
always getting "returned" mail showing addresses to whom I never sent
anything (usually with attached viruses, which Earthlink considerately
removes before processing it).