有沒有辦法在不發送電子郵件或連接到POP/IMAP的情況下檢查用戶SMTP服務器憑證。 我試圖編寫的一些代碼在它上面失敗。 你能找到那裏缺少的東西嗎?JavaMail SMTP憑證驗證,無需實際發送電子郵件
不要擔心電子郵件/密碼。我知道它在那裏。
注意:如果您嘗試了代碼。提供正確憑證時應通過案例1。 如果失敗,則有人更改密碼。你應該使用其他一些電子郵件地址。
import java.util.Properties;
import javax.mail.Authenticator;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
public class EmailTest {
public static void main(String[] args) {
EmailHelper eh = new EmailHelper();
/* GMail Setting for SMTP using STARTTLS */
String name = "AAA";
String email = "[email protected]";
String smtpHost = "smtp.gmail.com";
String serverPort = "587";
String requireAuth = "true";
String dontuseAuth = "false";
String userName = email; // same as username for GMAIL
String password = "zaq12wsx";
String incorrectPassword = "someRandomPassword";
String enableSTARTTLS = "true";
String dontenableSTARTTLS = "false";
try {
/* only valid case */
eh.sendMail(name, email, smtpHost, serverPort, requireAuth,
userName, password, enableSTARTTLS);
System.out.println("Case 1 Passed");
/* should fail since starttls is required for GMAIL. */
eh.sendMail(name, email, smtpHost, serverPort, requireAuth,
userName, password, dontenableSTARTTLS);
System.out.println("Case 2 Passed");
/* should fail since GMAIL requires authentication */
eh.sendMail(name, email, smtpHost, serverPort, dontuseAuth, "", "",
dontenableSTARTTLS);
System.out.println("Case 3 Passed");
/* should fail. password is incorrect and starttls is not enabled */
eh.sendMail(name, email, smtpHost, serverPort, requireAuth,
userName, incorrectPassword, dontenableSTARTTLS);
System.out.println("Case 4 Passed");
} catch (MessagingException e) {
e.printStackTrace();
}
}
}
class EmailHelper {
private Properties properties = null;
private Authenticator authenticator = null;
private Session session = null;
public void sendMail(String name, String email, String smtpHost,
String serverPort, String requireAuth, String userName,
String password, String enableSTARTTLS) throws MessagingException {
properties = System.getProperties();
properties.put("mail.smtp.host", smtpHost);
properties.put("mail.smtp.port", serverPort);
properties.put("mail.smtp.starttls.enable", enableSTARTTLS);
properties.put("mail.smtp.auth", requireAuth);
properties.put("mail.smtp.timeout", 20000);
authenticator = new SMTPAuthenticator(userName, password);
session = Session.getInstance(properties, authenticator);
// session.setDebug(true);
Transport tr = session.getTransport("smtp");
tr.connect();
/*
* do I need more than just connect? Since when i try to send email with
* incorrect credentials it fails to do so. But I want to check
* credentials without sending an email. Assume that POP3/IMAP username
* is not same as the SMTP username, since that might be one of the
* cases
*/
}
}
class SMTPAuthenticator extends Authenticator {
private String userName = null;
private String password = null;
public SMTPAuthenticator(String userName, String password) {
this.userName = userName;
this.password = password;
}
@Override
public PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(userName, password);
}
}
它工作正常。你的問題是什麼? – 2010-04-21 09:54:01
它不能正常工作。正如我提到2/3/4的情況下應報告某種錯誤,因爲所做的設置不是GMail接受的設置。 所以我可能需要的東西不僅僅是.connect() 究竟是什麼?那是我想要的。 – DarK 2010-04-21 12:16:12