I've noticed that Gmail is letting a pattern of spam messages through lately (maybe the past month or two?).

With the subject line of Delivery Status Notification (Failure) and then just a junk email body.

Just me? Is using a subject line of Delivery Status Notification (Failure) really all it takes to get past Gmail's spam filtering?

@wdormann noticed the exact same recently coming to my inbox, I do see some in my spam folder so it looks like they are catching some of them.