Full Disclosure mailing list archives

Re: a question about e-mails


From: Sebastian Niehaus <killedbythoughts () mindcrime net>
Date: Thu, 26 Feb 2004 17:21:23 +0100

"Dave Howe" <DaveHowe () cmn sharp-uk co uk> writes:

If you aren't listed in To or CC, it is obvious you were BCCed,
and it is impossible to determine the other BCC recipients as that
information never leaves the mail composer (that said, an initial
first-hop host *could* compare multiple emails sent in a single session,
and rebuild the BCC 

Given the recipients of all mails are on the same domain or on the
same MX the last hop can rebuild the bcc as well.

Unless somebody inbetween uses qmail as mailserver :-)


Sebastian

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