Introduction

Gomail is a simple and efficient package to send emails. It is well tested and documented.

Gomail can only send emails using an SMTP server. But the API is flexible and it is easy to implement other methods for sending emails using a local Postfix, an API, etc.

It is versioned using gopkg.in so I promise there will never be backward incompatible changes within each version.

It requires Go 1.2 or newer. With Go 1.5, no external dependencies are used.

Features

Gomail supports:

• Attachments
• Embedded images
• HTML and text templates
• Automatic encoding of special characters
• SSL and TLS
• Sending multiple emails with the same SMTP connection

Documentation

https://pkg.go.dev/github.com/glpkg/gomail

Download

go get github.com/glpkg/gomail

Examples

package main

import (
	"github.com/glpkg/gomail"
)

var conf = gomail.Config{
	Host:     "smtp.exmail.qq.com",
	Port:     465,
	Username: "邮箱账号",
	Password: "邮箱密码",
	FromName: "发件人名称",
}

// Send 发送邮件
func Send(title, content, toMailAddr string) error {
	return SendAttach(title, content, toMailAddr, "")
}

// SendAttach 发邮件带附件
func SendAttach(title, content, toMailAddr, attachURL string) error {
	return SendAttachSpec(title, content, toMailAddr, attachURL, "")
}

// SendAttachSpec 发送邮件附件且可命名附件名
func SendAttachSpec(title, content, toMailAddr, attachURL, fileName string) error {
	arg := gomail.MessageArg{
		To:    []string{toMailAddr},
		Title: title,
		Body:  content,
	}
	if attachURL != "" {
		arg.Attachs = append(arg.Attachs, gomail.Attach{Path: attachURL, Name: fileName})
	}
	return send(arg)
}

func send(arg gomail.MessageArg) error {
	msg := gomail.NewMessageWithArg(arg)
	dialer := gomail.NewDialer(conf)
	err := dialer.DialAndSend(msg)
	return err
}

func main() {
	Send("邮件标题", "邮件内容", "接收者邮件地址")
}

FAQ

x509: certificate signed by unknown authority

If you get this error it means the certificate used by the SMTP server is not considered valid by the client running Gomail. As a quick workaround you can bypass the verification of the server's certificate chain and host name by using SetTLSConfig:

package main

import (
	"crypto/tls"

	"gopkg.in/gomail.v2"
)

func main() {
	d := gomail.NewDialer("smtp.example.com", 587, "user", "123456")
	d.TLSConfig = &tls.Config{InsecureSkipVerify: true}

    // Send emails using d.
}

Note, however, that this is insecure and should not be used in production.

Contribute

Contributions are more than welcome! See CONTRIBUTING.md for more info.

Change log

See CHANGELOG.md.

License

MIT