On Jun 28, 14:32, Jim McIntosh wrote:
} ----------------------------Original message----------------------------
} In <[log in to unmask]> Eric Thomas <[log in to unmask]>
} writes:
} >Interesting... However, before I make any change to the code I need some
} >sort of formal assurance that these tags are indeed present in all
} >(conformant) usenet messages, and are not part of any current RFC822
} >extension. In fact, I am pretty sure I have seen messages without
} >'Supersedes:' or 'Archive-Name:' (I understand you were addressing the
} >particular problems of FAQ, but I'd like a solution that works for all
} >usenet messages, rather than just FAQ files).
} I can only think of one tag which would generally indicate a Usenet
} post, and that is "Path:". All the other tags are regularly found in
} e-mail, or else they are not required to be in Usenet posts.
The big trick is how often a news-2-mail gateway manages to preserve
Path:. As any other header. You could do some sort of majority rule:
if any two of Newsgroups:, Path:, Expires:, Supersedes:. These are,
I believe, only present in the news RFCs (which are, after all,
derivitives of RFC822).
It would be interesting to see the typical header set arriving at
a LISTSERV from such a posting.
Keep in mind that we're only talking about dropping bounces for
dup articles that have been dropped. The worst that happens if
we choose incorrectly is that you don't find out about a dropped
duplicate. Which doesn't strike me as a great loss.
You're not going to get 100% accuracy. It depends on how much stripping
the news-2-mail gateways do, and, on the other side, how more ordinary
mail articles are created - such as a reply to a listserv-2-news gateway.
It is a popular practise to gateway mailing lists to local, or
limited distribution newsgroups. This is so that multiple people can
read, while incurring the cost of transport only once. Also, even
on single user systems people use it (such as I), because the newsreaders
are better at handling high volume stuff that you're mostly going to
browse.
Maybe I should start using an Errors-To: if it's actually going
to be seen, let alone passed thru to the LISTSERV from the news-2-mail
gateway. What do you say in Errors-To to get bounces discarded?
On another topic, I just saw the posting regarding the split headers.
Wayne may have misspoke slightly by mentioning Pnews only. Since trn
(Pnews and Rnmail) compose the complete message as one block, including
headers and body (it presents the whole thing to you with your editor),
it's unlikely that trn is at fault. It's the interface to the MTA
that's causing problems - some of them, for example, hate seeing extra
Date or From headers and may do wierd things.
--
Chris Lewis; [log in to unmask]; Phone: Canada 613 832-0541
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