Re: [leafnode-list] Re: Spam

[Matthias Andree <ma@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>]

"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).

-- 
Matthias Andree
leafnode-1 download: http://sourceforge.net/projects/leafnode/
leafnode-1 docs/new: http://mandree.home.pages.de/leafnode/
leafnode-2 homepage: http://mandree.home.pages.de/leafnode/beta/

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