I believe that unwanted emails should be reported to spam blocker/providers so that they are blocked on a global level. Thousands and thousands of these and, well, perhaps their emails/system will stop working altogether. Why should we wait for them to fix it when we can force them to address the issue because they are now globally blacklisted and not a *single* email will go through now?
Just my 2c.
It just so happens my buddy is senior engineer at a global company who oversees lists like this ... Should we be considering the nuclear option until it’s fixed? Hehe