On 7/5/06 4:30 PM, "Barry Warsaw" <[EMAIL PROTECTED]> wrote:
> I'm thinking something along the lines of sha1 hashing Message-ID and > perhaps Date. RFC 2822 $3.6 says that the only required headers are > the origination date (Date:) and originator address fields (From: and > possibly Sender: and Reply-To:). One does see messages with no Date: header. In the past, one also saw messages with multiple Date: headers. (Neither condition complies with RFCs.) I suspect in that case the hash would include some convenient constant. (I can't remember where I saw the multiple Date: header form--it might have been from Western Union (or not)). I was examining Date: headers because of the bug in old Exchange + Outlook combinations in which a crafted overlength Date: header could cause viral infections if the message were simply present in a mailbox list display created by Outlook. (Around 1966 or so, but of course those versions have to be in use together somewhere still--it's only a decade.) --John _______________________________________________ Mailman-Developers mailing list Mailman-Developers@python.org http://mail.python.org/mailman/listinfo/mailman-developers Mailman FAQ: http://www.python.org/cgi-bin/faqw-mm.py Searchable Archives: http://www.mail-archive.com/mailman-developers%40python.org/ Unsubscribe: http://mail.python.org/mailman/options/mailman-developers/archive%40jab.org Security Policy: http://www.python.org/cgi-bin/faqw-mm.py?req=show&file=faq01.027.htp
