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.