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Usend is powered by the infrastructure of Cloudflare and MailChannels, enabling seamless and efficient email communication. This simple, yet powerful email sending library benefits from the robust infrastructure and reliable delivery services provided by these companies.

The partnership between Cloudflare and MailChannels has made Usend a valuable tool for developers. To learn more about how they contribute to the project's infrastructure, we recommend reading the blog post Sending Email from Workers with MailChannels.