[Evolution] Viewing attachments in Evo?

[Svante R Signell <srs kth se>]

Hi,

How to enable the external viewers for pdf attachments in Evo?
If people attach the files as a "PDF document attachment" it can be
viewed with an external viewer, like evince or xpdf. As learnt recently
this can be controlled by opening a .pdf document using the file viewer
in Nautilus. BTW: How to open the Nautilus file viewer from a terminal?
I have forgotten the command.

When the file is attached as "application/acrobat attachment"
or "application/stream attachment" I only get the option to save the
file and the use an external viewer to actually look at the file. Where
to enable the inside Evo viewing? Is related to mime.types and/or
mailcap files??

Thanks!