Exchange Server Toolbox
Question / Problem
Can I create my own SpamAssassin rules, and where can I store them?
Answer / Solution
Yes, you can use the build in custom SpamAssassin config file editor which you can find under Spam Options to create a .cf-file suited to your needs.
Alternatively you can create a .cf-file manually and store it together with all the other .cf-files. Because SpamAssassinprocesses the .cf-files in alphabetical order, you should call your own.cf-file in a way, that it will be processed last (e.g. use x, y, z as firstletter of your file’s name : XMySettings.cf).