golang 發送郵件（不帶附件）

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package mainimport ("log""net/smtp""flag""fmt""strings")var ( subject = flag.String("s","","subject of the mail") body = flag.String("b", "", "body of email") reciMail = flag.String("m","","recipient mail address"))func main(){ flag.Parse() sub := fmt.Sprintf("subject: %s\r\n\r\n",*subject) content := *body mailList := strings.Split(*reciMail,",") fmt.Println(sub) fmt.Println(content) fmt.Println(mailList) auth := smtp.PlainAuth( "", "jackma_www@126.com", "12345pwd", "smtp.126.com", ) err := smtp.SendMail(  "smtp.126.com:25",  auth,  "jackma_yyy@126.com",  mailList,  []byte(sub+content), ) if err != nil {  log.Fatal(err) }}