javax.mail服务器不接受Exchange应用编程接口提供的用户名/密码

Question

我有一个可爱的小Java客户端，可以发送签名的电子邮件消息。我们有一台需要用户名/密码身份验证才能发送邮件的Exchange服务器。

当我连接到exchange服务器时，我收到以下错误：

avax.mail.AuthenticationFailedException: failed to connect
        at javax.mail.Service.connect(Service.java:322)
        at javax.mail.Service.connect(Service.java:172)

当我连接到其他服务器(Unix服务器)时，我没有问题。

下面是完整的调试跟踪。我想不出来。

DEBUG: JavaMail version 1.4.2
DEBUG: successfully loaded resource: /META-INF/javamail.default.providers
DEBUG: Tables of loaded providers
DEBUG: Providers Listed By Class Name: {com.sun.mail.smtp.SMTPSSLTransport=javax.mail.Provider[TRANSPORT,smtps,com.sun.mail.smtp.SM}
DEBUG: Providers Listed By Protocol: {imaps=javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Sun Microsystems, Inc], }
DEBUG: successfully loaded resource: /META-INF/javamail.default.address.map
DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc]
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: trying to connect to host "SERVER", port 25, isSSL false
220 SERVER ESMTP (deca81216f2ecf4fd6fedb030e3dcfd0)
DEBUG SMTP: connected to host "SERVER", port: 25

EHLO CLIENT
250-SERVER Hello CLIENT [192.1.1.1], pleased to meet you
250-STARTTLS
250-PIPELINING
250-SIZE 100000000
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN PLAIN
250-8BITMIME
250 HELP
DEBUG SMTP: Found extension "STARTTLS", arg ""
DEBUG SMTP: Found extension "PIPELINING", arg ""
DEBUG SMTP: Found extension "SIZE", arg "100000000"
DEBUG SMTP: Found extension "AUTH", arg "LOGIN PLAIN"
DEBUG SMTP: Found extension "AUTH=LOGIN", arg "PLAIN"
DEBUG SMTP: Found extension "8BITMIME", arg ""
DEBUG SMTP: Found extension "HELP", arg ""
STARTTLS
220 Ready to start TLS
EHLO CLIENT
250-SERVER Hello CLIENT [192.1.1.1], pleased to meet you
250-PIPELINING
250-SIZE 100000000
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN PLAIN
250-8BITMIME
250 HELP
DEBUG SMTP: Found extension "PIPELINING", arg ""
DEBUG SMTP: Found extension "SIZE", arg "100000000"
DEBUG SMTP: Found extension "AUTH", arg "LOGIN PLAIN"
DEBUG SMTP: Found extension "AUTH=LOGIN", arg "PLAIN"
DEBUG SMTP: Found extension "8BITMIME", arg ""
DEBUG SMTP: Found extension "HELP", arg ""
DEBUG SMTP: Attempt to authenticate
DEBUG SMTP: check mechanisms: LOGIN PLAIN DIGEST-MD5 
AUTH LOGIN
334 VXNlcn5hbWU6
RVJOXHNsK2FyZmlu
334 UGFzc3dvcmQ6
UVdFUnF3ZXIxMjM0IUAjJA==
535 Error: authentication failed
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: trying to connect to host "SERVER", port 25, isSSL false
220 SERVER ESMTP (deca81216f2ecf4fd6fedb030e3dcfd0)
DEBUG SMTP: connected to host "SERVER", port: 25

EHLO CLIENT
250-SERVER Hello CLIENT [192.1.1.1], pleased to meet you
250-STARTTLS
250-PIPELINING
250-SIZE 100000000
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN PLAIN
250-8BITMIME
250 HELP
DEBUG SMTP: Found extension "STARTTLS", arg ""
DEBUG SMTP: Found extension "PIPELINING", arg ""
DEBUG SMTP: Found extension "SIZE", arg "100000000"
DEBUG SMTP: Found extension "AUTH", arg "LOGIN PLAIN"
DEBUG SMTP: Found extension "AUTH=LOGIN", arg "PLAIN"
DEBUG SMTP: Found extension "8BITMIME", arg ""
DEBUG SMTP: Found extension "HELP", arg ""
STARTTLS
220 Ready to start TLS
EHLO CLIENT
250-SERVER Hello CLIENT [192.1.1.1], pleased to meet you
250-PIPELINING
250-SIZE 100000000
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN PLAIN
250-8BITMIME
250 HELP
DEBUG SMTP: Found extension "PIPELINING", arg ""
DEBUG SMTP: Found extension "SIZE", arg "100000000"
DEBUG SMTP: Found extension "AUTH", arg "LOGIN PLAIN"
DEBUG SMTP: Found extension "AUTH=LOGIN", arg "PLAIN"
DEBUG SMTP: Found extension "8BITMIME", arg ""
DEBUG SMTP: Found extension "HELP", arg ""
DEBUG SMTP: Attempt to authenticate
DEBUG SMTP: check mechanisms: LOGIN PLAIN DIGEST-MD5 
AUTH LOGIN
334 VXNlcm5hbWU6
RVJOXHNsZ2FyZmlu
334 UGFzc3dvcmQ6
UVdFUnF3ZXIxMjM0IUAjJA==
535 Error: authentication failed
Error sending mail: failed to connect
javax.mail.AuthenticationFailedException: failed to connect
        at javax.mail.Service.connect(Service.java:322)
        at javax.mail.Service.connect(Service.java:172)
        at SignMessage.sendSigned(SignMessage.java:248)
        at SignMessage.main(SignMessage.java:340

Answer 1

显然，Java Mail API未正确建立MS Exchange SSL连接。它依赖于使用SSLSocketFactory来实现这一点，但是，如果我没记错的话，MS Exchange需要某种混合的方法。

无论如何，我在我的一个项目中有这段代码：

import javax.net.SocketFactory;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import javax.net.ssl.*;
import java.io.IOException;
import java.net.InetAddress;
import java.net.Socket;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

public class ExchangeSSLSocketFactory extends SSLSocketFactory {

private SSLSocketFactory sslSocketFactory;
private SocketFactory socketFactory;

public ExchangeSSLSocketFactory() {
    try {
        socketFactory = SocketFactory.getDefault();

        SSLContext context = SSLContext.getInstance("TLS");
        context.init(null, new TrustManager[] { new EmptyTrustManager() }, null);
        sslSocketFactory = (SSLSocketFactory)context.getSocketFactory();
    }
    catch (Exception e) {
        throw new RuntimeException(e);
    }
}

private final class EmptyTrustManager implements X509TrustManager {
    public void checkClientTrusted(X509Certificate[] cert, String authType) throws CertificateException {}

    public void checkServerTrusted(X509Certificate[] cert, String authType) throws CertificateException {}

    public X509Certificate[] getAcceptedIssuers() {
        return new java.security.cert.X509Certificate[0];
    }
}

public static SocketFactory getDefault() {
    return new ExchangeSSLSocketFactory();
}

@Override
public Socket createSocket(Socket socket, String s, int i, boolean flag) throws IOException {
    return sslSocketFactory.createSocket(socket, s, i, flag);
}

@Override
public Socket createSocket(InetAddress inaddr, int i, InetAddress inaddr1, int j) throws IOException {
    return socketFactory.createSocket(inaddr, i, inaddr1, j);
}

@Override
public Socket createSocket(InetAddress inaddr, int i) throws IOException {
    return socketFactory.createSocket(inaddr, i);
}

@Override
public Socket createSocket(String s, int i, InetAddress inaddr, int j) throws IOException {
    return socketFactory.createSocket(s, i, inaddr, j);
}

@Override
public Socket createSocket(String s, int i) throws IOException {
    return socketFactory.createSocket(s, i);
}

@Override
public Socket createSocket() throws IOException {
    return socketFactory.createSocket();
}

@Override
public String[] getDefaultCipherSuites() {
    return sslSocketFactory.getSupportedCipherSuites();
}

@Override
public String[] getSupportedCipherSuites() {
    return sslSocketFactory.getSupportedCipherSuites();
}

}

您可以通过设置以下属性告诉Java Mail API使用此套接字工厂：

• ssl.SocketFactory.provider
• mail.smtp.socketFactory.class

设置为ExchangeSSLSocketFactory的完整类名

从您的调试输出来看，您似乎已经拥有了：

• mail.smtp.starttls.enable设置为true

有了所有这些，问题就应该解决了。

Answer 2

我也有同样的问题。现在它可以正常工作了。我禁用了杀毒软件(McAfee)并更正了用户名(我不必要地提供了域名，但它并不是必需的)。

Answer 3

尝试显式禁用纯登录：

properties.setProperty("mail." + protocol + ".auth.plain.disable", "true");

或

props.put("mail.smtp.auth.plain.disable", true);

显然，在exchange的一些版本中有一个bug，它宣传支持普通身份验证，而实际上这总是会失败。