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- Path: sparky!uunet!pipex!bnr.co.uk!uknet!gdt!aber!fronta.aber.ac.uk!pcg
- From: pcg@aber.ac.uk (Piercarlo Grandi)
- Newsgroups: comp.mail.mime
- Subject: Re: Using MIME without extra mail headers
- Message-ID: <PCG.93Jan13022930@decb.aber.ac.uk>
- Date: 13 Jan 93 02:29:30 GMT
- References: <1993Jan7.191810.1857@infodev.cam.ac.uk> <wBk7wB2w165w@blues.kk.sub.org>
- Sender: news@aber.ac.uk (USENET news service)
- Reply-To: pcg@aber.ac.uk (Piercarlo Grandi)
- Organization: Prifysgol Cymru, Aberystwyth
- Lines: 60
- In-Reply-To: kosta@blues.kk.sub.org's message of 10 Jan 93 21: 31:55 GMT
- Nntp-Posting-Host: decb.aber.ac.uk
-
- On 10 Jan 93 21:31:55 GMT, kosta@blues.kk.sub.org (Kosta Kostis) said:
-
- kosta> (Alasdair Grant) writes:
-
- Alasdair> Is there any convention for transmitting MIME messages if
- Alasdair> extra mail headers (Content-Type etc.) cannot be used for one
- Alasdair> reason or another? Do any mailers understand messages whose
- Alasdair> first (text) line begins "MIME-Version..." or something?
-
- Good question, and good subsequent discussion. In particular I agree
- with your idea that MIME can be used outside RFC based mail, for non RFC
- based mail, or indeed for any sort of document encoding.
-
- kosta> The MIME-headers should be in the headers only.
-
- Is is so difficult to contemplate that this is not an option in some
- mail systems, which are *not* RFC based, and have nothing to do with the
- Internet? The Internet is large, but it is only one of many mail
- domains.
-
- kosta> Well, "my ideal" MTA would only analyse the headers of a message
- kosta> needed for routing (if at all), transfer everything without
- kosta> changing any bit (except adding "Received"-lines perhaps) and
- kosta> forward the message to next next MTA on the way to the
- kosta> receipient.
-
- Within the Internet this is (barely) possible; within other mail systems
- it is not. All they undertake is to deliver message bodies.
-
- kosta> It's the MUA's job to interpret the content of the message, only,
- kosta> but the MUA must know about the encoding used and stuff like
- kosta> that.
-
- kosta> but you'll have to tell your MUA manually to convert the message,
- kosta> if at all possible. It's like using uuencode/uudecode.
-
- What about defining an in-band, very obvious, "magic string", sort of
- cookie, that says to a MUA (or to *any* file manipulation program), that
- 'hey this is a MIME thingie'? Then cookie aware MUAs can apply metamail
- or whatever MIMEry automagically, even if it is impossible to tag the
- message envelope appropriately or even if there is no envelope.
-
- As long as the cookie is *standard*, and damn unlikely to occur as part
- of "normal" text.
-
- There ought to be an option within the MUA/file viewer with three
- values:
-
- CHECK: ask every time if the file should be MIMEd.
- ALWAYS: MIME the file every time there is a MIME cookie.
- NEVER: don't MIME the file even if there is a MIME cookie.
-
- kosta> What's your problem changing header lines? Maybe we can help you
- kosta> to do this somehow.
-
- Often this is not an option. Some mail systems have fixed headers.
- --
- Piercarlo Grandi, Dept of CS, PC/UW@Aberystwyth <pcg@aber.ac.uk>
- E l'italiano cantava, cantava. E le sue disperate invocazioni giunsero
- alle orecchie del suo divino protettore, il dio della barzelletta
-