[Users] Understanding processing (and pre/post-)

[Removed GDPR]

On Sun, 18 Mar 2018 21:43:46 +0000 Dave Howorth wrote:

> In return it's a reasonable expectation that the questioner will say
> upfront what research and experimentation they have already done to
> answer the question

After reading the manual and before asking here I have searched the web
for the intended use of pre/post processing and I have found no
useful answers. I have also done a simple test with pre-processing to
apply a color to messages based on a header. Still this experimentation
does not really answer the question as it reveals nothing about the
intended workflow, what rules should go into filtering, what in
pre/post/processing and in what situations all this is aimed to be used.

-- 
George