diff --git a/README.md b/README.md
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+++ b/README.md
@@ -1058,6 +1058,7 @@ _Libraries and tools that implement email creation and sending._
 - [MailHog](https://github.com/mailhog/MailHog) - Email and SMTP testing with web and API interface.
 - [Mailpit](https://github.com/axllent/mailpit) - Email and SMTP testing tool for developers.
 - [mailx](https://github.com/valord577/mailx) - Mailx is a library that makes it easier to send email via SMTP. It is an enhancement of the golang standard library `net/smtp`.
+- [mox](https://github.com/mjl-/mox) - Modern full-featured secure mail server for low-maintenance, self-hosted email.
 - [SendGrid](https://github.com/sendgrid/sendgrid-go) - SendGrid's Go library for sending email.
 - [smtp](https://github.com/mailhog/smtp) - SMTP server protocol state machine.
 - [smtpmock](https://github.com/mocktools/go-smtp-mock) - Lightweight configurable multithreaded fake SMTP server. Mimic any SMTP behaviour for your test environment.