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Exchange server will not accept username/password provided with javax.mail API

由 左心房为你撑大大i 提交于 2019-12-03 22:30:49
javashlook

Apparently, MS Exchange SSL connection is not established properly by Java Mail API. It relies on using SSLSocketFactory for that, but, if I remember correctly, MS Exchange requires a somewhat mixed approach.

Anyway, I have this piece of code in one of my projects:

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();
}

}

You tell the Java Mail API to use this socket factory by setting following properties:

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

to full class name of ExchangeSSLSocketFactory

From your debug output, it seems that you already have:

  • mail.smtp.starttls.enable set to true

With all this in place, the problem should be solved.

I had the same issues. Now it works properly. I disabled the antivirus (McAfee) and corrected the user name (I unnecessarily gave the domain whereas it was not required).

Sam Barnum

Try disabling plain login explicitly:

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

OR

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

Apparently there's a bug in some versions of exchange where it advertises support for plain auth when in fact that will always fail.

标签
java
email
exchange-server
javax.mail
smtp-auth
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