I am having trouble either finding the right documentation or just not understanding. What I am trying to achieve is that if there is not a specific header such as X-Example: ABC , it will then get marked as spam. Currently I have been trying
header ABC_HEADER exists:X-Example: ABC But I am thinking this is a backwards attempt as if I add a score as is, I am just adding to the total if it exists and not if it does not exist. I then found if-unset: and tried that instead of exists: but when I restart spam assassin I get the following error in the logs. info: config: invalid regexp for rule ABC_HEADER: : missing or invalid delimiters tried method header ABC_HEADER if-unset:X-Example: ABC What I am not grokking properly here? Thanks for any help and your time.
