From that report it looks what actually flagged the email as spam is that the from address is blacklisted. The Bayes score isn’t great, but not enough to have it flagged (only 0.8 out of 4.5 required).

Do you have suggestions on what to change about the email content to lower the score? I’m guessing this is because it’s a short message with a link.

I don’t have suggestions, I’m afraid :(