Serifize: Your email newsletters, delivered to your Kindle

Hi Product Hunt! Serifize turns your email newsletters into Kindle ebooks. How it works: you get a Serifize email address. Subscribe to newsletters with it, or add a Gmail filter that forwards them. Every issue gets converted into a Kindle ebook, with the images and a cover page, and sent to your Kindle a few minutes after it arrives. A few things I spent time on: it handles Gmail's forwarding confirmation for you, so setup doesn't stall there; when Amazon rejects a document, the dashboard shows it as failed instead of pretending it was delivered; and if you're on the free plan and hit the monthly limit, newsletters wait for you instead of disappearing. Your first month is unlimited, then it's free for 3 newsletters a month, or $36 a year for unlimited. I'd love to hear which newsletters you'd want on your Kindle.