On Tuesday, November 28, 2000, at 01:01 PM, Serge Knystautas wrote:
> ----- Original Message -----
> From: "Stuart Roebuck" <[EMAIL PROTECTED]>
>
> > Any interest including my "UseHeaderRecipients" mailet
> > submission? It's certainly working well for me, and comes with the
> extensive documentation:
>
> There is interest, I just haven't had the chance to give feedback yet (so I
> guess I'll start now).
>
> First, I don't think I've ever seen the Mail-for header. However I wanted
> to read through specs to see if this is ever mentioned, or perhaps this is
> just a sendmail-ism. I think this header would just duplicate what is in
> the To and CC header and the necessarily hidden BCC recipients.
I spent a fair amount of time analysing the headers of mail that was coming in to me
through via my host with its ".forward" file. This isn't quite the same as looking up
the definitions, but it's still reasonably scientific!
I found that some emails (particularly from some newsgroups) come without my email
address in any of the actual message headers (To or Cc, etc.). It appears that they
arrive at the forwarding host with my address as a recipient in the SMTP header. If
my forwarding host receives such an email with only a single SMTP recipient, it adds a
"Mail-For" header to the message, containing my email address. In these cases, when I
get it, the only way of determining the final intended destination of the forwarded
email (which has now lost my email address from its SMTP recipients list), is to look
at the message "Mail-For" header.
> Second, you will never see a header for BCC (or at least you shouldn't) as
> it's supposed to be a blind copy. (again I'll say this is a header I've
> never seen and haven't had a chance to research, so this isn't 100%
> definitive)
Yes, that makes complete sense. I simply looked at the definition of all the
recipients of a MIME Message, and it said "To, Cc, Bcc & Newsgroup" - but we're not
sending the email here.
> Finally, I think you'd have unreliable behavior by adding the Newsgroup
> header as those messages shouldn't be going through SMTP and while NNTP and
> SMTP have similar message formats and possible to have messages delivered to
> both I guess, I'm not sure how mail clients handle it, and there's no
> support in James (or any mail server I'm aware of) that could detect an
> newsgroup name and deliver over NNTP (this does sound like a potential
> mailet)
As above, I just copied verbatim - bit dumb really! The only headers that are
necessary for the system to work for me are "Mail-For, To & Cc" and, as I suggested in
another email, if there is a "Mail-For" my evidence would appear to suggest that I can
ignore the others.
> Anyway, I wanted to make most all of my comments after some time-permitting
> research, so take these as less informed comments than I'd like them to be.
> :)
Thanks,
Stuart.
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