* [Cloud Mail v3.2.0](https://github.com/maillab/cloud-mail) – Serverless email platform built on Cloudflare Workers with web and API support.

* [Mailtrap Node.js client v4.10.0](https://github.com/mailtrap/mailtrap-nodejs) – Node.js client for sending transactional and bulk emails with sandbox mode, attachments, and API token-based authentication.

* [Upyo 0.5.2](https://github.com/dahlia/upyo) – Cross-runtime library for sending email messages using SMTP and various providers.