No, this has nothing to do with the policy, or "action=DENY". (hint: "blocked" is not the same as "deny").
I think this is caused by a setting in your AV profile. It's called "Block executable as attachment as malware" (or the like). This is a security setting where any program attached to an email is regarded as potentially dangerous, and thus blocked.
"Kernel panic: Aiee, killing interrupt handler!"