Show HN: Mailrecipe limits the number of emails you send to a user to 1 per day http://bit.ly/2XcZ91A

Show HN: Mailrecipe limits the number of emails you send to a user to 1 per day Last week, I spammed my users with emails by mistake. I had written an idempotent method to do a transaction and send a confirmation email. I didn't realize the email call is not idempotent. So, when the transaction failed, it retried again and again and spammed the entire user base with emails. I was so embarrassed and wrote an API layer on top of my email delivery service (SendGrid) to ensure that my users won't get more than 1 email per day, irrespective of my architecture or mistakes. I am publishing it as a public API, in case anyone else needs it: http://bit.ly/2SGcJw2 Have you run into this problem? How did you solve it? February 18, 2019 at 03:45PM