江哥架构师笔记下面使用go来发送邮件
注意
1、body ：= ``，这里用的是反单引号，而非单引号；
2、err != nil，golang的nil在概念上和其它语言的null、None、nil、NULL一样，都指代零值或空值。
nil是预先说明的标识符，也即通常意义上的关键字。在golang中，nil只能赋值给指针、channel、func、
interface、map或slice类型的变量。如果未遵循这个规则，则会引发panic。对此官方有明确的说明：
3、参数auth，auth := smtp.PlainAuth("", user, password, hp[0])
4、强制类型转换，msg := []byte("To: " + to + "\r\nFrom: " + user + "\r\nSubject: " + subject + "\r\n" + content_type + "\r\n\r\n" + body)
5、多个邮箱：send_to := strings.Split(to, ",")
6、如果发送不成功，注意是否要使用授权码作为密码来发送
下面是一个测试通过的示例
package main
import (
"fmt"
"net/smtp"
"strings"
)
func SendToMail(user, password, host, to, subject, body, mailtype string) error {
hp := strings.Split(host, ":")
auth := smtp.PlainAuth("", user, password, hp[0])
var content_type string
if mailtype == "html" {
content_type = "Content-Type: text/" + mailtype + "; charset=UTF-8"
} else {
content_type = "Content-Type: text/plain" + "; charset=UTF-8"
}
msg := []byte("To: " + to + "\r\nFrom: " + user + "\r\nSubject: " + subject + "\r\n" + content_type + "\r\n\r\n" + body)
fmt.Println(string(msg))
send_to := strings.Split(to,",")
err := smtp.SendMail(host, auth, user, send_to, msg)
return err
}
func main() {
user := "a@b.com"
password := "aaa"
host := "smtp.ym.163.com:25"
to := "b@b.com,c@b.com" //多个用,分割
subject := "使用Golang发送邮件"
body := `
<html>
<body>
<h3>
"Test send to email"
</h3>
</body>
</html>
`
fmt.Println("send email")
err := SendToMail(user, password, host, to, subject, body, "html")
if err != nil {
fmt.Println("Send mail error!")
fmt.Println(err)
} else {
fmt.Println("Send mail success!")
}
}
D:\go\test2>go run main.go
send email
To: b@b.com,c@b.com
From: a@b.com
Subject: 使用Golang发送邮件
Content-Type: text/html; charset=UTF-8
<html>
<body>
<h3>
"Test send to email"
</h3>
</body>
</html>
Send mail success!
如果想要发送漂亮的html页面，可以从下面的站点获取html文件，然后将源码放到上面的body中就可以
https://mp.weixin.qq.com/s?__biz=MzI4NjczNzAxNQ==&mid=2247483680&idx=1&sn=fc66daa5434aaaaee05590b07dca926b&chksm=ebd91638dcae9f2e1b155911c78ccc90a4131c9701a74d87ed8c3e0b14b18e6b742f7dd79677&scene=0#rd
参考文档：
https://studygolang.com/articles/2098
http://blog.csdn.net/wangshubo1989/article/details/70808989
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