For all email. I disagree that marketing email in general is a problem though. Eg. we send a monthly newsletter that is explicitly marketing, but it's opt-in (not opt-out; users need to explicitly choose to receive it), so I'm not sure what the harm is there. And yes, it's easy to unsubscribe too.

Unsolicited marketing email is a problem, and I don't think we send anything that a reasonable person could categorize as that. We send

-replies to user support requests

-new vehicle listing alerts that users have explicitly signed up for (eg by running a search for a car on autotempest and then entering their email address in the "get alerts for this search" field)

-monthly newsletter, again with explicit opt-in only

And I send a handful of personal B2B emails.

I don't think so. The post claims there's ways to deal with spam without trusting single authorities to police it.

Additionally, the linked post explains that if you get flagged as spam or "sending to many emails" there's literally no way to fix it without sounding the alarm in a post like this.