使用JavaMail API在不使用SSL的情况下发送邮件

Question

I would like to make my android app using my mail server to send the mail, my server is using port 25, so my app need to send the mail without the appearance of ssl. 我想使用我的邮件服务器发送邮件使我的Android应用程序，我的服务器使用端口25，所以我的应用程序需要发送邮件没有ssl的外观。 I have tried the way mentioned in most of the similar questions here, but none of it works, therefore I open a new question to ask. 我在这里尝试了大多数类似问题中提到的方法，但没有一个有效，因此我打开一个新问题要问。 Here are some links I have read: 以下是我读过的一些链接：
Send email in android using JavaMail API with smtp but without SSL 使用带有smtp但没有SSL的JavaMail API在android中发送电子邮件
Sending emails over SMTP with TSL 使用TSL通过SMTP发送电子邮件
Java Mail: SSLHandshakeException when sending email on port 25 without SSL Java Mail：在没有SSL的情况下在端口25上发送电子邮件时发生SSLHandshakeException
Javamail: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException when sending mail from VPS Javamail：javax.net.ssl.SSLHandshakeException：从VPS发送邮件时的sun.security.validator.ValidatorException
Using JavaMail with TLS 将JavaMail与TLS结合使用
http://java.sun.com/products/javamail/javamail-1.4.2/SSLNOTES142.txt http://java.sun.com/products/javamail/javamail-1.4.2/SSLNOTES142.txt

Below is my mail sending class: 以下是我的邮件发送课程：

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: 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: 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];
    }
}

Error messages in log: 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

Here I have changed "Transport transport = session.getTransport("smtps");" 我在这里改变了“Transport transport = session.getTransport（”smtps“）;” to "Transport transport = session.getTransport("smtps");", and messages in error log has changed. 到“Transport transport = session.getTransport（”smtps“）;”，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

Answer 1

This seems like a duplicate of your other thread: SSLException in using JavaMail API , although over there it seemed like you did want to use SSL. 这看起来像是你的另一个线程的副本：使用JavaMail API时的SSLException ，虽然在那里看起来你确实想要使用SSL。

If you don't want to use SSL, why do you have DummySSLSocketFactory and DummyTrustManager? 如果您不想使用SSL，为什么还要使用DummySSLSocketFactory和DummyTrustManager？ Get rid of them entirely and use the "smtp" protocol, not the "smtps" protocol. 完全摆脱它们并使用“smtp”协议，而不是“smtps”协议。 And, as I explained in your other thread, you don't need any socket factory properties at all, even if you were using SSL. 而且，正如我在您的其他主题中所解释的那样，即使您使用的是SSL，也根本不需要任何套接字工厂属性。

You didn't say whether you wanted to use STARTTLS, that is, whether you want to connect to your mail server using a plain text (non-SSL) connection and then switch the connection to SSL. 您没有说是否要使用STARTTLS，即是否要使用纯文本（非SSL）连接连接到邮件服务器，然后将连接切换到SSL。 If you want to do that, set the mail.smtp.starttls.enable property to true. 如果要这样做，请将mail.smtp.starttls.enable属性设置为true。

使用JavaMail API在不使用SSL的情况下发送邮件

问题描述

1 个解决方案

解决方案1
1 已采纳 2012-08-15 17:55:32

使用JavaMail API在不使用SSL的情况下发送邮件

问题描述

1 个解决方案

解决方案1 1 已采纳 2012-08-15 17:55:32

解决方案1
1 已采纳 2012-08-15 17:55:32