The phishing testing at my company entertains me. They had to put in a mail header to get it past their own filters and we're not required to report them, we just get a lecture if we're tricked.
Someone put that all together and wrote their own filters to automatically delete them. They shared how to do so in a public room and now I imagine the only people who ever fail are new hires.
I set mine only to mark them read, not delete them, in case it got triggered incorrectly.