SMTP has been the way we send emails for decades, and almost every provider supports it. However, in some regions, such as my hometown (Mainland China), ISPs often block ports 25, 587, and 465. This means I sometimes cannot connect to my mail server. When I'm away, my users can become very anxious because emails simply stop going out. To solve this problem, I built Amail, an open-source SMTP proxy server. By deploying it in a suitable network environment, you can proxy your email requests with very little system resource usage. All you need to do is call an API. Amail is intentionally simple. In theory, it can run on extremely small servers (even a free Oracle Cloud VPS?). At the same time, it includes features such as connection pooling and automatic sender selection. To reduce migration costs, Amail is compatible with part of the Resend API. This means that if you're already using Resend, in most cases you only need to replace the API endpoint with Amail, or use the Node.js SDK `@wydev/amail`, and you're ready to go. I'm a high school student developer. I prefer solving real problems that I personally encounter by writing software, rather than being told to purchase a $199/month enterprise subscription every time I hit a limitation. Amail was born from a simple idea: when existing solutions cannot meet your needs, build a better one yourself—instead of following the ads for Mailgun and other companies that show up on Google.

Amail

Proxy SMTP to API for better email sending

Proxy SMTP to API for better email sending