32cd890b6e
* 增加sendcloud邮件服务器的支持 * 调整代码结构 * Used slince.Contains function --------- Co-authored-by: shih <shih@knownsec.com>
91 lines
2.3 KiB
Go
91 lines
2.3 KiB
Go
package common
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import (
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"crypto/tls"
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"encoding/base64"
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"fmt"
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"net/smtp"
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"slices"
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"strings"
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"time"
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)
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func generateMessageID() (string, error) {
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split := strings.Split(SMTPFrom, "@")
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if len(split) < 2 {
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return "", fmt.Errorf("invalid SMTP account")
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}
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domain := strings.Split(SMTPFrom, "@")[1]
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return fmt.Sprintf("<%d.%s@%s>", time.Now().UnixNano(), GetRandomString(12), domain), nil
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}
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func SendEmail(subject string, receiver string, content string) error {
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if SMTPFrom == "" { // for compatibility
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SMTPFrom = SMTPAccount
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}
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id, err2 := generateMessageID()
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if err2 != nil {
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return err2
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}
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if SMTPServer == "" && SMTPAccount == "" {
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return fmt.Errorf("SMTP 服务器未配置")
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}
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encodedSubject := fmt.Sprintf("=?UTF-8?B?%s?=", base64.StdEncoding.EncodeToString([]byte(subject)))
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mail := []byte(fmt.Sprintf("To: %s\r\n"+
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"From: %s<%s>\r\n"+
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"Subject: %s\r\n"+
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"Date: %s\r\n"+
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"Message-ID: %s\r\n"+ // 添加 Message-ID 头
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"Content-Type: text/html; charset=UTF-8\r\n\r\n%s\r\n",
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receiver, SystemName, SMTPFrom, encodedSubject, time.Now().Format(time.RFC1123Z), id, content))
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auth := smtp.PlainAuth("", SMTPAccount, SMTPToken, SMTPServer)
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addr := fmt.Sprintf("%s:%d", SMTPServer, SMTPPort)
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to := strings.Split(receiver, ";")
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var err error
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if SMTPPort == 465 || SMTPSSLEnabled {
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tlsConfig := &tls.Config{
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InsecureSkipVerify: true,
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ServerName: SMTPServer,
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}
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conn, err := tls.Dial("tcp", fmt.Sprintf("%s:%d", SMTPServer, SMTPPort), tlsConfig)
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if err != nil {
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return err
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}
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client, err := smtp.NewClient(conn, SMTPServer)
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if err != nil {
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return err
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}
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defer client.Close()
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if err = client.Auth(auth); err != nil {
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return err
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}
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if err = client.Mail(SMTPFrom); err != nil {
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return err
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}
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receiverEmails := strings.Split(receiver, ";")
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for _, receiver := range receiverEmails {
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if err = client.Rcpt(receiver); err != nil {
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return err
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}
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}
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w, err := client.Data()
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if err != nil {
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return err
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}
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_, err = w.Write(mail)
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if err != nil {
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return err
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}
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err = w.Close()
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if err != nil {
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return err
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}
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} else if isOutlookServer(SMTPAccount) || slices.Contains(EmailLoginAuthServerList, SMTPServer) {
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auth = LoginAuth(SMTPAccount, SMTPToken)
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err = smtp.SendMail(addr, auth, SMTPFrom, to, mail)
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} else {
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err = smtp.SendMail(addr, auth, SMTPFrom, to, mail)
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}
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return err
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}
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