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:…
Mailrecipe limits the number of emails you send to a user to 1 per day launched on February 18, 2019 with 6 votes, #1,249 of 3,290 launches that month and more than 50% of that year's launches.
What it does
In the maker’s words, at launch
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…
Does a similar job
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Mailrecipe for SendGrid/GoogleCloud2019 · ▲5Limit the marketing emails you send to a user to 1 per day ✋
- A1After 10 years my side project has hit $8k/mo in revenue2020 · ▲442
Back in 2010 I had an idea for a service that would allow people to easily create semi-permanent email aliases so that they could give an email address to people and websites without revealing their real email address. These aliases will continue to work indefinitely unless you choose to block them. My brother and I spent a few months building the initial version and launched the website in July 2010. For the first year we had about 50 signups per month, by 2013 this had increased to 1500 and it's currently around 3500 per month. Similarly, our revenue grew consistently but slowly - doubling…
Mailercloud Email API PlatformMar 2026 · mailercloud.com · ▲1651,000+ Emails per Second with 99%+ Deliverability
FastReply2020 · chromewebstore.google.com · ▲86Finally a lightweight template system for your emails!
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Source: Show HN post ↗ · launch text quoted in part
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