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Re: [leafnode-list] Re: Spam
On Wed, 02 Apr 2003 11:04:33 +0200, Matthias Andree wrote
> "clemens fischer" <ino-qc@xxxxxxxxxxxxxxxxxxxxxx> writes:
> > "Mike Vanecek" <leafnode_lists@xxxxxxxxxxxxxx>:
> >>> Just "X-Archive: encrypt" in the header will to the job
> >> I guess I need to do is figure out where sendmail allows one to
> >> insert custom headers.
> > not sendmail. your MUA (user agent) puts this header into user
> > headers, sendmail only handles envelopes, because it's a transport
> > system.
> Not quite. Sendmail treats envelope and header addresses the same and
> can manipulate addresses in the header. It is also susceptible to
> "attacks" through specially-crafted headers, on the cause of
> implementation defects (such as assuming char is unsigned, see the
> 8.12.9 changelog).
Does that mean that I can insert the header into sendmail? If so, where and how?
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