How to market a b2b product?

Hey indie hackers,

Data: A few weeks ago we've launched a tool for email marketers — Blink. In a nutshell, it's a bunch of pre-made beautifully-looking html email templates for small companies.

Question: How to market our product properly and generate targeted leads? I'd love to hear any suggestions.

P.S. We already started with SEO and content marketing.
P.P.S I don't want to spam you with the links so I didn't link to our product in this post.