爱站程序员基地由于go默认tls.Config{ServerName: host, InsecureSkipVerify: false}，
func TestHtmlEmail(t *testing.T) {opt := &EmailOptions{User: \"\",Password: \"\",To: []string{\"\"},From: \"\",Addr: \"smtp.xxx.com:25\",}auth := NewLoginAuth(opt.User, opt.Password)pic, err := ioutil.ReadFile(`C:\\Pictures\\example.png`)if err != nil {t.Log(err)}dest := make([]byte, base64.StdEncoding.EncodedLen(len(pic)))base64.StdEncoding.Encode(dest, pic)buf := bytes.Buffer{}fmt.Fprint(&buf, \"<html><head></head><body><p>Test png</p><p><img src=\\\"data:image/png;base64,\")_, err = buf.Write(dest)fmt.Fprint(&buf, \"\\\"></p><body></html>\")err = sendMail(opt.Addr, auth, opt.From, opt.To, buf.Bytes(), \"subject\")if err != nil {t.Log(err)}}type LoginAuth struct {username, password string}func NewLoginAuth(username, password string) smtp.Auth {return &LoginAuth{username, password}}func (a *LoginAuth) Start(server *smtp.ServerInfo) (string, []byte, error) {return \"LOGIN\", []byte{}, nil}func (a *LoginAuth) Next(fromServer []byte, more bool) ([]byte, error) {if more {switch string(fromServer) {case \"Username:\":return []byte(a.username), nilcase \"Password:\":return []byte(a.password), nildefault:return nil, errors.New(\"Unknown fromServer\")}}return nil, nil}func sendMail(addr string, auth smtp.Auth, from string, to []string, msg []byte, subject string) error {conn, err := smtp.Dial(addr)host, _, _ := net.SplitHostPort(addr)if err != nil {return err}defer conn.Close()if ok, _ := conn.Extension(\"STARTTLS\"); ok {config := &tls.Config{ServerName: host, InsecureSkipVerify: true}if err = conn.StartTLS(config); err != nil {return err}}if auth != nil {if ok, _ := conn.Extension(\"AUTH\"); ok {if err = conn.Auth(auth); err != nil {return err}}}if err = conn.Mail(from); err != nil {return err}for _, addr := range to {if err = conn.Rcpt(addr); err != nil {return err}}w, err := conn.Data()if err != nil {return err}header := make(map[string]string)header[\"Subject\"] = subjectheader[\"MIME-Version\"] = \"1.0\"header[\"To\"] = strings.Join(to, \",\")header[\"From\"] = fromheader[\"Content-Type\"] = \"text/HTML; charset=\\\"utf-8\\\"\"header[\"Content-Transfer-Encoding\"] = \"base64\"message := \"\"for k, v := range header {message += fmt.Sprintf(\"%s: %s\\r\\n\", k, v)}message += \"\\r\\n\" + base64.StdEncoding.EncodeToString(msg)_, err = w.Write([]byte(message))if err != nil {return err}err = w.Close()if err != nil {return err}return conn.Quit()}
转载于:Go语言/3cwYg4
