Re: MIME part header

Bruce Lilly wrote:
 
>> For a plain text US-ASCII part you generally need no header
>> fields at all (for the default inline disposition).
 
> There is no such thing as "default inline disposition".
 
> A MIME-part has inline disposition if and only if it contains
> a Content-Disposition MIME-part header field specifying
> inline disposition.

I'd consider a MUA not displaying US-ASCII text/plain as plain
text as broken, YMMV.

>| a sender who goes to the trouble of producing a
>| Content-Disposition header with a new disposition type is
>| more likely aiming for something more elaborate than inline
>| presentation.

Yes, you'd need a Content-Disposition: attachment if you don't
want the normal behaviour for "no Content header field at all".
 
> a MIME-part with no corresponding Content-Disposition
> header field does not have semantics of "attachment",
> regardless of what 'KANA Response' and some other MUAs may
> label them.

+100 (factor 100 for "KANA", I recall that from the SWEN-times
before MyDoom)

Frank