This is something I've considered doing for years after dealing with the likes of Clickbank, etc. I'd love to pick your brain for your requirements. How can I get in touch?
We've been seeing a huge number of messages sent through Google Groups via our Google Apps domain flagged as spam. I'm not sure what has triggered it lately, but it's almost impossible for us to communicate through our Google Groups email addresses anymore.
Currently working on a SaaS to help online furniture retailers (and eventually any retailer) increase customer engagement, conversions, and lower returns.
On the weekends, I'm working on a super easy photo-prints-on-demand service: https://keepsakemail.com/
Connect to Instagram - pick photos - enter payment and shipping details. One flat rate shipped anywhere. Reply to your email receipt and mention this HN comment and I'll refund half of your payment as a discount :)
Many of my friends and family use Instagram and I wanted to surprise them with photo-quality prints of their Instagram photos. I couldn't find a super simple solution that would let me do this, so I built one over a weekend or two.