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我想让我的 android 应用程序使用我的邮件服务器发送邮件，我的服务器使用端口 25，所以我的应用程序需要在没有 ssl 的情况下发送邮件。我已经尝试过这里大多数类似问题中提到的方法，但都没有奏效，因此我提出了一个新问题。以下是我读过的一些链接：
使用带有 smtp 但没有 SSL 的 JavaMail API 在 android 中
发送电子邮件 使用 TSL
Java Mail 通过 SMTP 发送电子邮件：在没有 SSL Javamail 的端口 25 上发送电子邮件时出现
SSLHandshakeException：javax.net.ssl.SSLHandshakeException：sun。
使用带有 TLS 的 JavaMail 从 VPS 发送邮件时出现 security.validator.ValidatorException
http://java.sun.com/products/javamail/javamail-1.4.2/SSLNOTES142.txt

下面是我的邮件发送类：

public class MailSender extends Authenticator { 
    private String user; 
    private String password; 

    private String [] to; 
    private String from; 

    private String port; 
    private String sport; 

    private String host; 

    private String subject; 
    private String body; 

    private boolean auth; 
    private boolean debuggable; 

    private Multipart multi; 

    public MailSender(){ 
        host = "me.myserver.com"; 
        port = "25"; 
        sport = "25"; 

        user = ""; 
        password = ""; 
        from = ""; 
        subject = ""; 
        body = ""; 

        debuggable = true; 
        auth = true; 

        multi = new MimeMultipart(); 

        // There is something wrong with MailCap, javamail can not find a handler for the multipart/mixed part, so this bit needs to be added. 
        MailcapCommandMap mc = (MailcapCommandMap) CommandMap.getDefaultCommandMap();  
        mc.addMailcap("text/html;; x-java-content-handler=com.sun.mail.handlers.text_html");  
        mc.addMailcap("text/plain;; x-java-content-handler=com.sun.mail.handlers.text_plain");  
        mc.addMailcap("multipart/*;; x-java-content-handler=com.sun.mail.handlers.multipart_mixed"); 
        mc.addMailcap("message/rfc822;; x-java-content-handler=com.sun.mail.handlers.message_rfc822");  
        CommandMap.setDefaultCommandMap(mc);  
    } 

    public MailSender(String user, String password){ 
        this();       
        this.user = user; 
        this.password = password;    
    } 

    public boolean send() throws Exception { 
        Properties props = setProperties(); 

        try{ 
            Session session = Session.getInstance(props, this); 
            session.setDebug(true); 

            MimeMessage msg = new MimeMessage(session); 

            msg.setFrom(new InternetAddress(from)); 

            InternetAddress[] addressTo = new InternetAddress[to.length]; 
            for(int i=0; i<to.length; i++){ 
                addressTo[i] = new InternetAddress(to[i]); 
            } 

            msg.setRecipients(MimeMessage.RecipientType.TO, addressTo); 
            msg.setSubject(subject); 
            msg.setSentDate(new Date()); 

            BodyPart messageBodyPart = new MimeBodyPart(); 
            messageBodyPart.setText(body); 
            multi.addBodyPart(messageBodyPart); 

            msg.setContent(multi); 

            Transport transport = session.getTransport("smtps"); 
            transport.connect(host, 25, user, password); 
            transport.sendMessage(msg, msg.getAllRecipients()); 
            transport.close(); 
            return true; 
        } catch (Exception e) { 
            e.printStackTrace(); 
            return false; 
        } 
    } 

    public void addAttachment(String filename) throws Exception { 
        BodyPart messageBodyPart = new MimeBodyPart(); 
        DataSource source = new FileDataSource(filename); 
        messageBodyPart.setDataHandler(new DataHandler(source)); 
        messageBodyPart.setFileName(filename); 

        multi.addBodyPart(messageBodyPart); 
    } 

    @Override  
      public PasswordAuthentication getPasswordAuthentication() {  
        return new PasswordAuthentication(user, password);  
      } 

    private Properties setProperties() { 
        Properties props = new Properties(); 

        props.put("mail.smtp.host", host); 

        if(debuggable) { 
            props.put("mail.debug", "true"); 
        } 

        if(auth) { 
            props.put("mail.smtp.auth", "true"); 
        } 

        //props.put("mail.smtp.ssl.enable", "false");
        //props.put("mail.smtp.ssl.trust", "*");

        props.put("mail.smtp.port", port); 
        props.put("mail.smtp.socketFactory.port", sport); 
        //props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory"); 
        //props.put("mail.smtp.socketFactory.fallback", "true"); 
        props.setProperty("mail.smtp.ssl.enable", "true");
        props.setProperty("mail.smtp.ssl.socketFactory.class",
                        "DummySSLSocketFactory");
        props.setProperty("mail.smtp.ssl.socketFactory.fallback", "false");

        //props.put("mail.smtp.starttls.enable", "false");

        return props; 
    } 

    public void setTo(String[] toAddress) { 
        this.to = toAddress; 
    } 

    public void setFrom(String fromAddress) { 
        this.from = fromAddress; 
    } 

    public void setSubject(String subject) { 
        this.subject = subject; 
    } 

    public void setBody(String body) {  
        this.body = body;  
    } 
}

DummySSLSocketFactory.java：

public class DummySSLSocketFactory extends SSLSocketFactory {
    private SSLSocketFactory factory;

    public DummySSLSocketFactory() {
    try {
        SSLContext sslcontext = SSLContext.getInstance("TLS");
        sslcontext.init(null,
                 new TrustManager[] { new DummyTrustManager()},
                 null);
        factory = (SSLSocketFactory)sslcontext.getSocketFactory();
    } catch(Exception ex) {
        // ignore
    }
    }

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

    public Socket createSocket() throws IOException {
    return factory.createSocket();
    }

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

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

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

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

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

    public String[] getDefaultCipherSuites() {
    return factory.getDefaultCipherSuites();
    }

    public String[] getSupportedCipherSuites() {
    return factory.getSupportedCipherSuites();
    }
}

DummyTrustManager.java：

public class DummyTrustManager implements X509TrustManager {
    public void checkClientTrusted(X509Certificate[] cert, String authType) {
    // everything is trusted
    }

    public void checkServerTrusted(X509Certificate[] cert, String authType) {
    // everything is trusted
    }

    public X509Certificate[] getAcceptedIssuers() {
    return new X509Certificate[0];
    }
}

日志中的错误消息：

08-15 16:08:59.338: W/System.err(16163): javax.mail.MessagingException: Could not connect to SMTP host: me.myserver.com, port: 25;
08-15 16:08:59.338: W/System.err(16163):   nested exception is:
08-15 16:08:59.338: W/System.err(16163):    javax.net.ssl.SSLHandshakeException: javax.net.ssl.SSLProtocolException: SSL handshake aborted: ssl=0x5bfaf480: Failure in SSL library, usually a protocol error
08-15 16:08:59.338: W/System.err(16163): error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol (external/openssl/ssl/s23_clnt.c:766 0x580b87de:0x00000000)
08-15 16:08:59.338: W/System.err(16163):    at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1391)
08-15 16:08:59.338: W/System.err(16163):    at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:412)
08-15 16:08:59.346: W/System.err(16163):    at javax.mail.Service.connect(Service.java:288)
08-15 16:08:59.346: W/System.err(16163):    at Android.sender.MailSender.send(MailSender.java:100)
08-15 16:08:59.346: W/System.err(16163):    at Android.sender.Sender$SendMail.doInBackground(Sender.java:73)
08-15 16:08:59.346: W/System.err(16163):    at Android.sender.Sender$SendMail.doInBackground(Sender.java:1)
08-15 16:08:59.354: W/System.err(16163):    at android.os.AsyncTask$2.call(AsyncTask.java:287)
08-15 16:08:59.354: W/System.err(16163):    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
08-15 16:08:59.354: W/System.err(16163):    at java.util.concurrent.FutureTask.run(FutureTask.java:137)
08-15 16:08:59.354: W/System.err(16163):    at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
08-15 16:08:59.354: W/System.err(16163):    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
08-15 16:08:59.354: W/System.err(16163):    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
08-15 16:08:59.354: W/System.err(16163):    at java.lang.Thread.run(Thread.java:856)
08-15 16:08:59.354: W/System.err(16163): Caused by: javax.net.ssl.SSLHandshakeException: javax.net.ssl.SSLProtocolException: SSL handshake aborted: ssl=0x5bfaf480: Failure in SSL library, usually a protocol error
08-15 16:08:59.354: W/System.err(16163): error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol (external/openssl/ssl/s23_clnt.c:766 0x580b87de:0x00000000)
08-15 16:08:59.362: W/System.err(16163):    at org.apache.harmony.xnet.provider.jsse.OpenSSLSocketImpl.startHandshake(OpenSSLSocketImpl.java:436)
08-15 16:08:59.362: W/System.err(16163):    at org.apache.harmony.xnet.provider.jsse.OpenSSLSocketImpl$SSLInputStream.<init>(OpenSSLSocketImpl.java:647)
08-15 16:08:59.362: W/System.err(16163):    at org.apache.harmony.xnet.provider.jsse.OpenSSLSocketImpl.getInputStream(OpenSSLSocketImpl.java:618)
08-15 16:08:59.362: W/System.err(16163):    at com.sun.mail.smtp.SMTPTransport.initStreams(SMTPTransport.java:1449)
08-15 16:08:59.362: W/System.err(16163):    at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1366)
08-15 16:08:59.362: W/System.err(16163):    ... 12 more
08-15 16:08:59.362: W/System.err(16163): Caused by: javax.net.ssl.SSLProtocolException: SSL handshake aborted: ssl=0x5bfaf480: Failure in SSL library, usually a protocol error
08-15 16:08:59.362: W/System.err(16163): error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol (external/openssl/ssl/s23_clnt.c:766 0x580b87de:0x00000000)
08-15 16:08:59.362: W/System.err(16163):    at org.apache.harmony.xnet.provider.jsse.NativeCrypto.SSL_do_handshake(Native Method)
08-15 16:08:59.362: W/System.err(16163):    at org.apache.harmony.xnet.provider.jsse.OpenSSLSocketImpl.startHandshake(OpenSSLSocketImpl.java:395)
08-15 16:08:59.362: W/System.err(16163):    ... 16 more

这里我改了“Transport transport = session.getTransport("smtps");” 到“Transport transport = session.getTransport("smtps");”，并且错误日志中的消息已更改。

08-15 17:18:13.986: W/System.err(21399): javax.mail.MessagingException: Could not convert socket to TLS;
08-15 17:18:13.986: W/System.err(21399):   nested exception is:
08-15 17:18:13.986: W/System.err(21399):    javax.net.ssl.SSLHandshakeException: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.
08-15 17:18:13.986: W/System.err(21399):    at com.sun.mail.smtp.SMTPTransport.startTLS(SMTPTransport.java:1339)
08-15 17:18:13.986: W/System.err(21399):    at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:420)
08-15 17:18:13.986: W/System.err(21399):    at javax.mail.Service.connect(Service.java:288)
08-15 17:18:13.986: W/System.err(21399):    at Android.sender.MailSender.send(MailSender.java:100)
08-15 17:18:13.986: W/System.err(21399):    at Android.sender.Sender$SendMail.doInBackground(Sender.java:73)
08-15 17:18:13.986: W/System.err(21399):    at Android.sender.Sender$SendMail.doInBackground(Sender.java:1)
08-15 17:18:13.986: W/System.err(21399):    at android.os.AsyncTask$2.call(AsyncTask.java:287)
08-15 17:18:13.986: W/System.err(21399):    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
08-15 17:18:13.986: W/System.err(21399):    at java.util.concurrent.FutureTask.run(FutureTask.java:137)
08-15 17:18:13.986: W/System.err(21399):    at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
08-15 17:18:13.986: W/System.err(21399):    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
08-15 17:18:13.986: W/System.err(21399):    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
08-15 17:18:13.986: W/System.err(21399):    at java.lang.Thread.run(Thread.java:856)
08-15 17:18:13.986: W/System.err(21399): Caused by: javax.net.ssl.SSLHandshakeException: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.
08-15 17:18:13.986: W/System.err(21399):    at org.apache.harmony.xnet.provider.jsse.OpenSSLSocketImpl.startHandshake(OpenSSLSocketImpl.java:398)
08-15 17:18:13.986: W/System.err(21399):    at org.apache.harmony.xnet.provider.jsse.OpenSSLSocketImpl$SSLInputStream.<init>(OpenSSLSocketImpl.java:647)
08-15 17:18:13.986: W/System.err(21399):    at org.apache.harmony.xnet.provider.jsse.OpenSSLSocketImpl.getInputStream(OpenSSLSocketImpl.java:618)
08-15 17:18:13.986: W/System.err(21399):    at com.sun.mail.smtp.SMTPTransport.initStreams(SMTPTransport.java:1449)
08-15 17:18:13.986: W/System.err(21399):    at com.sun.mail.smtp.SMTPTransport.startTLS(SMTPTransport.java:1336)
08-15 17:18:13.986: W/System.err(21399):    ... 12 more
08-15 17:18:13.986: W/System.err(21399): Caused by: java.security.cert.CertificateException: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.
08-15 17:18:13.986: W/System.err(21399):    at org.apache.harmony.xnet.provider.jsse.TrustManagerImpl.checkTrusted(TrustManagerImpl.java:192)
08-15 17:18:13.994: W/System.err(21399):    at org.apache.harmony.xnet.provider.jsse.TrustManagerImpl.checkServerTrusted(TrustManagerImpl.java:163)
08-15 17:18:13.994: W/System.err(21399):    at org.apache.harmony.xnet.provider.jsse.OpenSSLSocketImpl.verifyCertificateChain(OpenSSLSocketImpl.java:597)
08-15 17:18:13.994: W/System.err(21399):    at org.apache.harmony.xnet.provider.jsse.NativeCrypto.SSL_do_handshake(Native Method)
08-15 17:18:13.994: W/System.err(21399):    at org.apache.harmony.xnet.provider.jsse.OpenSSLSocketImpl.startHandshake(OpenSSLSocketImpl.java:395)
08-15 17:18:13.994: W/System.err(21399):    ... 16 more
08-15 17:18:13.994: W/System.err(21399): Caused by: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.
08-15 17:18:13.994: W/System.err(21399):    ... 21 more
4

1 回答 1

1

这似乎与您的其他线程重复：SSLException in using JavaMail API，尽管在那里您似乎确实想使用 SSL。

如果你不想使用 SSL，为什么还要有 DummySSLSocketFactory 和 DummyTrustManager？完全摆脱它们并使用“smtp”协议，而不是“smtps”协议。而且，正如我在您的另一个线程中解释的那样，您根本不需要任何套接字工厂属性，即使您使用的是 SSL。

您没有说是否要使用 STARTTLS，即是否要使用纯文本（非 SSL）连接连接到您的邮件服务器，然后将连接切换到 SSL。如果您想这样做，请将 mail.smtp.starttls.enable 属性设置为 true。

于 2012-08-15T17:55:32.653 回答