无法使用 java 邮件客户端发送邮件

Question

我查看了之前关于 SO 的 links，但它们没有解决我的问题。

所以这是我的代码：

public class SendMail {

    private String from;
    private String to;
    private String host;
    private String subject;
    private String message;
    private String pass;

    private static final Logger LOGGER = Logger.getLogger(SendMail.class.getName());

    public SendMail(String from, String pass, String to, String host, String subject, String message) {
        super();
        this.from = from;
        this.to = to;
        this.host = host;
        this.subject = subject;
        this.message = message;
        this.pass = pass;
    }

    public void sendMail(){
        Properties properties = System.getProperties();
        final String USERNAME = from;
        final String PASSWORD = pass;

        properties.put("mail.smtp.user", USERNAME);
        properties.put("mail.smtp.host", "smtp.gmail.com");
        properties.put("mail.smtp.port", "25");
        properties.put("mail.debug", "true");
        properties.put("mail.smtp.auth", "true");
        properties.put("mail.smtp.starttls.enable", "true");
        properties.put("mail.smtp.EnableSSL.enable", "true");
        properties.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
        properties.setProperty("mail.smtp.socketFactory.fallbac k", "false");
        properties.setProperty("mail.smtp.port", "465");
        properties.setProperty("mail.smtp.socketFactory.port", "465");

        Session session = Session.getInstance(properties, new javax.mail.Authenticator(){
            protected PasswordAuthentication getPasswordAuthenticated(){
                return new PasswordAuthentication(USERNAME, PASSWORD);
            }
        });


        //properties.setProperty("mail.imap.ssl.enable", "true");
        //properties.put("mail.debug", "true");
        //Session session = Session.getInstance(properties);

        try {
            //Store store = session.getStore("imap");
            //store.connect(host, USERNAME, PASSWORD);

            MimeMessage mime = new MimeMessage(session);
            mime.setFrom(new InternetAddress(USERNAME));
            mime.setRecipient(Message.RecipientType.TO, new InternetAddress(to));
            mime.setSubject(subject);
            mime.setText(message);
            Transport.send(mime);
            LOGGER.log(Level.INFO, "Mail sent successfully");
        } catch (MessagingException e) {
            // TODO Auto-generated catch block
            LOGGER.log(Level.SEVERE, "Unable to send mail\n");
        }   
    }

}

这是日志：

DEBUG: JavaMail version 1.4.4
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.SMTPSSLTransport,Sun Microsystems, Inc], com.sun.mail.smtp.SMTPTransport=javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc], com.sun.mail.imap.IMAPSSLStore=javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Sun Microsystems, Inc], com.sun.mail.pop3.POP3SSLStore=javax.mail.Provider[STORE,pop3s,com.sun.mail.pop3.POP3SSLStore,Sun Microsystems, Inc], com.sun.mail.imap.IMAPStore=javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Sun Microsystems, Inc], com.sun.mail.pop3.POP3Store=javax.mail.Provider[STORE,pop3,com.sun.mail.pop3.POP3Store,Sun Microsystems, Inc]}
DEBUG: Providers Listed By Protocol: {imaps=javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Sun Microsystems, Inc], imap=javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Sun Microsystems, Inc], smtps=javax.mail.Provider[TRANSPORT,smtps,com.sun.mail.smtp.SMTPSSLTransport,Sun Microsystems, Inc], pop3=javax.mail.Provider[STORE,pop3,com.sun.mail.pop3.POP3Store,Sun Microsystems, Inc], pop3s=javax.mail.Provider[STORE,pop3s,com.sun.mail.pop3.POP3SSLStore,Sun Microsystems, Inc], smtp=javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,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
Dec 30, 2015 4:51:31 PM utility.mailclient.SendMail sendMail
SEVERE: Unable to send mail

另外，上面代码中的注释部分取自这个link:

http://www.oracle.com/technetwork/java/javamail/faq/index.html#gmail

这应该是正确的。但我得到了相同的结果。这是使用此代码的日志（并注释掉上面所有 properties.put 和 properties.setProperty 行）

DEBUG: JavaMail version 1.4.4
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.SMTPSSLTransport,Sun Microsystems, Inc], com.sun.mail.smtp.SMTPTransport=javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc], com.sun.mail.imap.IMAPSSLStore=javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Sun Microsystems, Inc], com.sun.mail.pop3.POP3SSLStore=javax.mail.Provider[STORE,pop3s,com.sun.mail.pop3.POP3SSLStore,Sun Microsystems, Inc], com.sun.mail.imap.IMAPStore=javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Sun Microsystems, Inc], com.sun.mail.pop3.POP3Store=javax.mail.Provider[STORE,pop3,com.sun.mail.pop3.POP3Store,Sun Microsystems, Inc]}
DEBUG: Providers Listed By Protocol: {imaps=javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Sun Microsystems, Inc], imap=javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Sun Microsystems, Inc], smtps=javax.mail.Provider[TRANSPORT,smtps,com.sun.mail.smtp.SMTPSSLTransport,Sun Microsystems, Inc], pop3=javax.mail.Provider[STORE,pop3,com.sun.mail.pop3.POP3Store,Sun Microsystems, Inc], pop3s=javax.mail.Provider[STORE,pop3s,com.sun.mail.pop3.POP3SSLStore,Sun Microsystems, Inc], smtp=javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc]}
DEBUG: successfully loaded resource: /META-INF/javamail.default.address.map
DEBUG: getProvider() returning javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Sun Microsystems, Inc]
DEBUG: mail.imap.fetchsize: 16384
DEBUG: mail.imap.statuscachetimeout: 1000
DEBUG: mail.imap.appendbuffersize: -1
DEBUG: mail.imap.minidletime: 10
DEBUG: trying to connect to host "imap.gmail.com", port 993, isSSL true
* OK Gimap ready for requests from 182.75.40.98 j10mb367075283iee
A0 CAPABILITY
* CAPABILITY IMAP4rev1 UNSELECT IDLE NAMESPACE QUOTA ID XLIST CHILDREN X-GM-EXT-1 XYZZY SASL-IR AUTH=XOAUTH2 AUTH=PLAIN AUTH=PLAIN-CLIENTTOKEN AUTH=OAUTHBEARER AUTH=XOAUTH
A0 OK Thats all she wrote! j10mb367075283iee
DEBUG IMAP: AUTH: XOAUTH2
DEBUG IMAP: AUTH: PLAIN
DEBUG IMAP: AUTH: PLAIN-CLIENTTOKEN
DEBUG IMAP: AUTH: OAUTHBEARER
DEBUG IMAP: AUTH: XOAUTH
DEBUG: protocolConnect login, host=imap.gmail.com, user=mailid04@gmail.com, password=<non-null>
A1 AUTHENTICATE PLAIN
+ 
AGF0dWxzcGFtMDRAZ21haWwuY29tAGF0dWxzcGFt
* CAPABILITY IMAP4rev1 UNSELECT IDLE NAMESPACE QUOTA ID XLIST CHILDREN X-GM-EXT-1 UIDPLUS COMPRESS=DEFLATE ENABLE MOVE CONDSTORE ESEARCH UTF8=ACCEPT LIST-EXTENDED LIST-STATUS
A1 OK mailid@gmail.com authenticated (Success)
A2 CAPABILITY
* CAPABILITY IMAP4rev1 UNSELECT IDLE NAMESPACE QUOTA ID XLIST CHILDREN X-GM-EXT-1 UIDPLUS COMPRESS=DEFLATE ENABLE MOVE CONDSTORE ESEARCH UTF8=ACCEPT LIST-EXTENDED LIST-STATUS
A2 OK Success
DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc]
DEBUG SMTP: useEhlo true, useAuth false
DEBUG SMTP: trying to connect to host "localhost", port 25, isSSL false
Dec 30, 2015 5:11:24 PM utility.mailclient.SendMail sendMail
SEVERE: Unable to send mail

PS: 我已经打开了 gmail 的检查，允许安全性较低的应用程序访问它。

Answer 1

这可能不是一个完整的答案，但有太多错误，我无法在评论中全部列出...

Get rid of the socket factory properties, you don't need them.
没有"mail.smtp.EnableSSL.enable"属性。也许你打算 "mail.smtp.ssl.enable".
您使用的是非常旧版本的 JavaMail，upgrade if you can。
立即更改您的 Gmail 密码，它在上面的日志输出中公开（但经过编码）。
使用 Transport 发送消息之前无需连接到应用商店。
Gmail 示例位于 JavaMail FAQ.
您将 "mail.smtp.port" 设置为不同的值两次。如果将 "mail.smtp.ssl.enable" 设置为 "true"，则根本不需要设置它。

如果您进行了所有这些更改但它仍然不起作用，请使用最新代码和调试输出更新您的 post。

Answer 2

经过多次尝试设置不同的属性后，我得到了能够发送邮件的代码。这是代码：

public void sendMail(){
    Properties properties = System.getProperties();
    final String USERNAME = from;
    final String PASSWORD = pass;

    properties.put("mail.smtp.starttls.enable", "true");
    properties.put("mail.smtp.host", host);
    properties.put("mail.smtp.user", from);
    properties.put("mail.smtp.password", pass);
    properties.put("mail.smtp.port", "587");
    properties.put("mail.smtp.auth", "true");
    //properties.put("mail.debug", "true");

    Session session = Session.getDefaultInstance(properties);
    try {

        MimeMessage mime = new MimeMessage(session);
        mime.setFrom(new InternetAddress(USERNAME));

        mime.setRecipient(Message.RecipientType.TO, new InternetAddress(to));
        mime.setSubject(subject);
        mime.setText(message);
        Transport transport = session.getTransport("smtp");
        transport.connect(host, from, pass);
        transport.sendMessage(mime, mime.getAllRecipients());
        transport.close();
        LOGGER.log(Level.INFO, "Mail sent successfully");
    } catch (MessagingException e) {
        // TODO Auto-generated catch block
        LOGGER.log(Level.ERROR, "Unable to send mail\n");
    }   
}

这里的显着变化是：

设置的不同属性。
最后transport.send的方式改为transport.sendMessage。

这行得通。

无法使用 java 邮件客户端发送邮件

Unable to send mail using java mail client

java

email

jakarta-mail