> I don't think your definition of spam matches the one that I understand it to mean. Spam is random email from someone you have not had contact with before firing messages to every address they can find anywhere on the web, the dark web, etc. Or if you ask not to be added to a mailing list and are added anyway.

I don't get _only_ this from Mailchimp, but I definitely get quite a bit of this from Mailchimp, Sendgrid, and others. I've marked it spam, reported it to them (no response), and continued to receive the emails.

I can be kind of scatter brained and generally give the benefit of the doubt, but sometimes it's pretty clear that, e.g., I most definitely did not sign up with some accountant in a different country, in a place I've never been to, to receive reminders of tax deadlines that don't apply to me and offers of accounting services I can't use. Or if I somehow did, the signup was deceptive enough that they never received meaningful consent and I'd call it spam anyway.

(And the email they're sending this to is not some easily confused gmail address or a fat finger--it's my own name at my own domain.)

Having valid contact details or an opt out on their sign up form isn't relevant given I never signed up. It's _unsolicited_, _bulk_ email. It's spam.