Java邮件: sending email via gmail with TLS

Question

这个问题已经有答案了:

Sending Email via gmail smtp server in JAVA (4 个回答)

已关闭 7 年前。

我正在尝试使用我的java应用程序发送简单的电子邮件，但是当我执行发送邮件时，我在控制台上只得到“220 2.0.0 Ready to start TLS”，之后什么也没有发生。方法代码如下:

try
    {
        /** Recipient address **/
        String messageRecipient = "@live.com";

        String pass = "";
        /** sender address **/
        String messageSender = "@gmail.com";

        /** get my properties **/
        Properties properties = System.getProperties();
        properties.put("mail.smtp.auth", "true");
        properties.put("mail.smtp.starttls.enable", "true");
        properties.put("mail.smtp.host", "smtp.gmail.com");
        properties.put("mail.smtp.user", messageSender);
        properties.put("mail.smtp.password",  pass);
        properties.put("mail.debug", "true");
        properties.put("mail.smtp.debug", "true");
        properties.put("mail.smtp.port", "587");

        /** get default session object **/
        Session session = Session.getDefaultInstance(properties,// null);
                new javax.mail.Authenticator()
        {
            protected PasswordAuthentication getPasswordAuthentication()
            {
                return new PasswordAuthentication("@gmail.com", "");
            }
        });

        try
        {
            MimeMessage message = new MimeMessage(session);
            message.setFrom(new InternetAddress(messageSender));

            //set to: header field of the header
            message.addRecipient(Message.RecipientType.TO, 
                            new InternetAddress(messageRecipient));
            //set subject: header field
            message.setSubject("Welcome to java mail!");

            //send message
            Transport transport = session.getTransport("smtp");
            transport.connect("smtp.gmail.com", 587, messageSender, pass);
            transport.sendMessage(message, message.getAllRecipients());
            transport.close();

            System.out.println(Errors.MESSAGE_SENT_SUCCESSFULLY);
            return null;
        }
        catch(MessagingException mex)
        {
            return Errors.MESSAGE_NOT_SENT;
        }
    }
    catch(Exception e)
    {
        return Errors.FILE_NOT_FOUND;
    }
}

并在控制台中调试输出:

     DEBUG: JavaMail version 1.4.5
    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.SMTPSS        LTransport,Sun Microsystems, Inc],                         com.sun.mail.smtp.SMTPTransport=javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTranspo        rt,Sun Microsystems, Inc],         com.sun.mail.imap.IMAPSSLStore=javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Su        n Microsystems, Inc], com.sun.mail.pop3.POP3SSLStore=javax.mail.Provider[STORE,pop3s,com.sun.mail.pop3.POP3SSLStore,Su        n 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
    DEBUG SMTP: trying to connect to host "smtp.gmail.com", port 587, isSSL false
    220 mx.google.com ESMTP e20sm6680361wiv.7
    DEBUG SMTP: connected to host "smtp.gmail.com", port: 587

    EHLO gadon-Komputer
    250-mx.google.com at your service, [83.22.91.238]
    250-SIZE 35882577
    250-8BITMIME
    250-STARTTLS
    250 ENHANCEDSTATUSCODES
    DEBUG SMTP: Found extension "SIZE", arg "35882577"
    DEBUG SMTP: Found extension "8BITMIME", arg ""
    DEBUG SMTP: Found extension "STARTTLS", arg ""
    DEBUG SMTP: Found extension "ENHANCEDSTATUSCODES", arg ""
    STARTTLS
    220 2.0.0 Ready to start TLS
    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 "smtp.gmail.com", port 587, isSSL false
    220 mx.google.com ESMTP et10sm6688757wib.2
    DEBUG SMTP: connected to host "smtp.gmail.com", port: 587

    EHLO gadon-Komputer
    250-mx.google.com at your service, [83.22.91.238]
    250-SIZE 35882577
    250-8BITMIME
    250-STARTTLS
    250 ENHANCEDSTATUSCODES
    DEBUG SMTP: Found extension "SIZE", arg "35882577"
    DEBUG SMTP: Found extension "8BITMIME", arg ""
    DEBUG SMTP: Found extension "STARTTLS", arg ""
    DEBUG SMTP: Found extension "ENHANCEDSTATUSCODES", arg ""
    STARTTLS
    220 2.0.0 Ready to start TLS

有人能告诉我这是怎么回事吗？我阅读了数百个有关 javamail 的主题，但找不到我的问题的答案。如果我更改密码，输出不会发生任何变化。

Answer 1

您可以使用Gmail example in the JavaMail FAQ来简化您的代码。 (不要设置端口号，使用“smtps”协议(protocol)，并摆脱身份 validator 。)此外，change getDefaultInstance to getInstance .