🚀 go-pugleaf

ag129@cus.cam.ac.uk (Alasdair Grant) writes:

> Is there any convention for transmitting MIME messages if extra
> mail headers (Content-Type etc.) cannot be used for one reason or
> another?  Do any mailers understand messages whose first (text) line
> begins "MIME-Version..." or something?

The MIME-headers should be in the headers only.

Well, "my ideal" MTA would only analyse the headers of a message
needed for routing (if at all), transfer everything without changing
any bit (except adding "Received"-lines perhaps) and forward the
message to next next MTA on the way to the receipient.

It's the MUA's job to interpret the content of the message, only,
but the MUA must know about the encoding used and stuff like that.

RFC 821 explicitly forces you to cut the MSB, so SMTP MTAs fully
conforming to RFC 821 will not be able to transfer binary or even
8bit data. Quoted-printables and base64 may be transmitted without
any problems, but you'll have to tell your MUA manually to convert
the message, if at all possible. It's like using uuencode/uudecode.

What's your problem changing header lines? Maybe we can help you to
do this somehow.

        Kosta


-- 
  Kosta Kostis, Talstrasse 25, D-6074 Roedermark 3, Germany
  kosta@blues.kk.sub.org                                        (home)
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