Ask HN: Please send me your startup spam, I'm making a startup email filter!

There's a much easier solution: the vast majority of legit auto-generated email will have a "List-Unsubscribe" MIME header. I filter based on that header into a 'Bulk' folder.

There are some exceptions, e.g. emails that go via the Drip service, but given limited number of automated email services you can probably catch 99% of emails with a few rules, rather than machine learning.

It's probably worth noting that email you sign up to receive is not spam.

If you don't think that receiving four emails in exchange for a free month of a $60/month SaaS product is a fair deal, your options include clicking the "Unsubscribe" link on that mail or not signing up for those mails in the first place.

Penalizing the company by marking the emails you asked them to send you as spam seems like a mean thing to do.

I understand you're primarily interested in training data here but I should ask.

Is this a problem? You're talking here about startups/saas you have signed up for sending you spam? I would expect most people don't sign up for too many of these and it's easy enough to click the unsubscribe link, would be worse to miss an email you appreciated getting.

Do you also want recruiter spam? I get tons of that.