operator message

Shankar Unni shankar@chromatic.com
Wed Feb 5 12:05:00 GMT 1997


do i care? wrote:

> actually this is a result of a fake email, apprently to means, pine knew
> that the message was fake, notice the sender address is from brazil, while
> it shows that he's the operator of cygnus...

Geez, it's nothing that fancy, folks. operator@wherever seems to have
simply done

 /usr/lib/sendmail gnu-win32@cygnus.com 

with an empty body fed into stdin. Sendmail will stick in an
Apparently-To: synthesized from the recipients on the command line if
there's no "To:" line in the message (which there obviously isn't: he
seems to have fed an empty file to sendmail). The other headers are all
synthesized by sendmail in its normal course of operation..

The "To: " header is not guaranteed to exist..
-- 
Shankar Unni                                  shankar@chromatic.com
Chromatic Research                            (408) 752-9488
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