https://github.com/wneessen/go-mail-middleware

A collection of message middlewares for go-mail
https://github.com/wneessen/go-mail-middleware

dkim dkim-signature go go-mail golang golang-library hacktoberfest mail middleware middlewares openpgp

Last synced: 3 months ago
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A collection of message middlewares for go-mail

• Host: GitHub
• URL: https://github.com/wneessen/go-mail-middleware
• Owner: wneessen
• License: mit
• Created: 2022-10-02T10:34:42.000Z (about 3 years ago)
• Default Branch: main
• Last Pushed: 2025-06-09T11:53:54.000Z (4 months ago)
• Last Synced: 2025-06-09T12:44:40.110Z (4 months ago)
• Topics: dkim, dkim-signature, go, go-mail, golang, golang-library, hacktoberfest, mail, middleware, middlewares, openpgp
• Language: Go
• Homepage: https://go-mail.dev
• Size: 272 KB
• Stars: 21
• Watchers: 1
• Forks: 3
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Funding: .github/FUNDING.yml
  • License: LICENSE
  • Code of conduct: CODE_OF_CONDUCT.md
  • Security: SECURITY.md

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README

          


# A collection of message middlewares for go-mail

[![GoDoc](https://godoc.org/github.com/wneessen/go-mail-middleware?status.svg)](https://pkg.go.dev/github.com/wneessen/go-mail-middleware)

[![codecov](https://codecov.io/gh/wneessen/go-mail-middleware/branch/main/graph/badge.svg?token=1XC87Z6QX4)](https://codecov.io/gh/wneessen/go-mail-middleware)

[![Go Report Card](https://goreportcard.com/badge/github.com/wneessen/go-mail-middleware)](https://goreportcard.com/report/github.com/wneessen/go-mail-middleware)

[![#go-mail on Discord](https://img.shields.io/badge/Discord-%23gomail-blue.svg)](https://discord.gg/dbfQyC4s)

[![REUSE status](https://api.reuse.software/badge/github.com/wneessen/go-mail-middleware)](https://api.reuse.software/info/github.com/wneessen/go-mail-middleware)



### What is this?

This repository is a collection of different useful middlewares for [go-mail](https://github.com/wneessen/go-mail). 

Since we want to keep `go-mail` free of third party dependencies and only depend on the Go Standard Library, we 

introduce a Middleware concept in version v0.2.8. This allows the user to alter a `mail.Msg` according to their 

needs by simple implementing tool that satisfies the `mail.Middleware` interface and provide it to the `mail.Msg`

with the `mail.WithMiddleware()` option. This allows the use of 3rd party libraries with `go-mail` mail messages, 

while keeping `go-mail` itself dependancy free.

### List of currently supported middlewares

* [dkim](dkim): DKIM (DomainKeys Identified Mail) middleware to sign mail messages

* [openpgp](openpgp): OpenPGP middleware to digitally encrypt and sign mail messages (Experimental/Development on hold)

* [subject_capitalize](subject_capitalize): Capitalizes the subject of the message matching the given language