I happened across an email header that troubles me a bit. Is it possible for an email to come in and not be scanned by the spam scanners at all? Here's part of the header in question:
It looks like it wasn't even tested at all. It's a legitimate email, but showing no tests worried me. In fact, as I'm browsing other headers for this particular user, many messages have that same header showing no tests.
X-Spam-Status: No, score=x tagged_above=-10 required=6.6 tests=