Thanks for sending the log files. Since you only attached the log, rather than the Diagnostic Report.tbz file, I cannot see how you have the rules set up. However, based on the log, I can see that Mail has not sent SpamSieve any incoming messages for analysis, which generally indicates that either there is no rule, that it’s not active, or that it’s not at the top of the rule list. So I recommend that you check Step 3 of the instructions again or send screenshots of your rule and the rule list if you have questions about how they should look.
