Re: change content type of attachment before sending

[Uwe Brauer <oub@mat.ucm.es>]

>>> "Eric" == Eric S Fraga <e.fraga@ucl.ac.uk> writes:

   > On Sunday, 1 Nov 2015 at 17:25, Uwe Brauer wrote: [...]

   >> But what if I don't know the type? The beauty of the interactive
   >> call is that it offers various possibilities which I never
   >> remember by heart.

    >  I am confused. In your OP, you said you wanted to erroneously set
    >  the type, e.g. to application/octet-stream. Either you know what
    >  you want to set to (erroneously) or the problem is a more
    >  fundamental one in your mailcap settings? That is, if I
    >  misunderstood you and you in fact want to correct erroneous file
    >  types, the problem is not with mml-xxx but with your system's
    >  settings which mml uses to determine file types. 

Ok here is the longer story. It concerns Xemacs and GNU emacs, tex files
and latin-1 and UTF-8 encoding.

Xemacs 21.5.X still uses Mule, while GNU emacs has moved to UFT-8
internally as far as I know.

Now the problem is the following:

    - I send a latex file with latin-1 chars, buffer coding is set to
       latin-1, via gnus as text/x-tex type to a Xemacs user: the
       coding is corrupted. 

    - I send a latex file with latin-1 chars, buffer coding is set to
       UTF-8, via gnus as text/x-tex type to a Xemacs user: the
       coding is ok.

Now 

    - the user sends it back, but now it is the other way around: if he
       sends using buffer coding is set to latin-1 via gnus as text/x-tex type
       to me: the coding is ok

    - The user  sends it back, buffer coding is set to
       UTF-8  via gnus as text/x-tex type me: the
       coding is corrupted.

GNU emacs ---UTF8-> Xemacs OK
Xemacs    ---latin-1-> GNU emacs ok

The problem can be circumvent using application/octet-stream then both
buffer codings are fine.
But I don't want that for every latex file.

That is why I want to be able to change the mml type, in case I made a
mistake, or using the dired function (since this much more comfortable
to use) which would allow me to chose the coding


Uwe Brauer