University subscribed its entire community for a mailing list which is impossible to unsubscribe from I realize that this is a very atypical question for this forum. To be frank, I'm not sure if this is the right place to ask. But it is part of my academic life, so I'm going to give it a try.
In the beginning of Fall 2020, our university (in the U.S.) created a mailing list and automatically subscribed the entire university community to it. It comes from a certain non-academic unit within the university, newly created to address certain social issues both within the university and in the wider community. Now, there's nothing abnormal about that. Of course, a university is a social organization, and there are multiple non-academic facets in its life. Our university has many such mailing lists on various academic and non-academic topics, which can be crucially important for everyone (payroll) or optional for interested persons only (university sports).
But one thing makes this new mailing list different: it seems to be impossible to unsubscribe from. I believe the university has a uniform mailing list platform for many of its newsletters, including this one. There's an unsubscribe link at the bottom of these emails. Clicking the link takes you to a subscription profile page. There's an option to unsubscribe from the publication at the bottom of the profile page. I checked the unsubscribe box months ago... and it had no effect whatsoever. The messages keep coming despite my unsubscribed status.
This was never an issue with any other mailing lists that used the same platform and that I was able to unsubscribe from (say, I'm not interested in sports, so I unsubscribed from that one). So my question is:

Are there any legal and/or ethical regulations and/or guidelines for non-commercial mailing lists within an organization, in particular within an academic organization?

I tried searching online. Clearly, CAN-SPAM doesn't apply here, because this is a non-commercial setting.
EDIT: In response to a comment below. Yes, I thought that it might be a bug. I emailed the university tech support about a month ago. They said that they don't know of an immediate source of the issue, and promised to escalate my request to a higher-level email team... and now it's been a month, and I haven't heard back from then again.
It's normal for universities to require all staff and all students to be on a mailing list.  This is how university leadership attempts to communicate what it is doing to everyone.
It would be odd if alumni cannot unsubscribe.
I think you will find the university is actually sending emails to email accounts it owns.  There will be no regulations restricting that.