And if you want to test your rules against a corpus rather than
testing against a few one-off spamples, then look into setting up a
local masscheck instance. You don't need to upload the results to SA,
but it will give you a good overview of how a rule behaves against
multiple messages.
I'm not sure what you mean by "Local masscheck instance". But I plan to
do the following:
1) set up SA in a docker container which has a volume containing my
spam/ham folders
2) run a script that syncs ham/spam with live server
2) set up a script that will compare scores before a rule is implemented
and with scores after it is implemented
3) script will output a report that tells me the results and report
whether a spam/ham email is "flipped"