Isn't that just a company policy? At some-point, the lawyers will get clued-in and require that even on Slack and other company-wide chat there be a limited retention window!

Cool! Where should I send bet money?

Mozilla or EFF, your choice. :-D

Excellent, $25 sent to EFF!

Do the people who wrote the email policy know that Slack is permanent? That sounds like the kind of thing that could easily be not-understood by legal.

Yeah this policy mismatch definitely seems like a "nobody in legal has noticed yet".

They're gonna notice real quick the next time they get sued by somebody clueful enough to subpoena that goldmine.

Have your Slack chats been subpoenaed yet?

If not, you are very lucky that you are being sued by people with incompetent attorneys.