golang：send mail using smtp package

這是一個建立於 的文章，其中的資訊可能已經有所發展或是發生改變。

go語言發送郵件，可以使用smtp包，兩個關鍵函數：

func PlainAuth(identity, username, password, host string) Auth

func SendMail(addr string, a Auth, from string, to []string, msg []byte) error

剛開始玩的時候，很好奇郵件的title是怎麼設定進去的，畢竟從代碼沒看見有setTitle。後來發現是解析msg擷取標題、寄件者、收件者、郵件格式、郵件內容等；因此msg需要按一定格式寫：To: xxx\r\nFrom:xxxx\r\nSubject: xxxx\r\nContent-Type:text/html; charset=UTF-8\r\n\r\n[郵件內容]

 

func (this *TestController) SendMail(){    subject := "This is golang test email..."    user := "xxxxx@163.com"    to := []string {"xxxxx@163.com"}    nickname := "dyao"    content := "mail body....."    contentType := "Content-Type: text/html; charset=UTF-8"    msg := []byte("To: " + strings.Join(to, ",") + "\r\nFrom: " + nickname + "<" + user + ">\r\nSubject: " + subject + "\r\n" + contentType + "\r\n\r\n" + content)    auth := smtp.PlainAuth(        "",        user,        "testpassword",        "smtp.163.com",    )    err := smtp.SendMail(        "smtp.163.com:25",        auth,        user,        to,        []byte(msg),    )    if err != nil{        log.Fatal(err)    }else {        log.Printf("Mail send:\r\n%s", msg)    }}