[Users] How to pass message body to an external filtering program?

[Pierre A.]

I use Filtering with Match criteria = External program test.

The arguments passed to the external program are documented in the Condition configuration panel, then the Information button:

"
The following symbols can be used:
%% literal %
%s Subject
%f From
%t To
%c CC
%d Date
%i Message-ID
%n Newsgroups
%r References
%F filename (should not be modified)
\n new line
\  escape character for quotes
\" quote character
"

Does a symbol for message body exist, what is it?

Best regards.