没有ssl的Java邮件 - PKIX路径构建失败： [英] Java mail without ssl - PKIX path building failed:

问题描述

我使用java邮件通过smtp发送电子邮件。下面给出了smtp设置：

I am using java mail to send emails over smtp. The smtp settings given below:

        Properties props = new Properties();
        Object put = props.put("mail.smtp.host", smtpHost);
        props.put("mail.smtp.user", smtpUser);
        props.put("mail.smtp.auth", true);
        props.put("mail.debug", mailDebug);
        props.put("mail.smtp.port", port);

smtp凭证已通过telnet到我的smtpHost验证，并附上上述详细信息。但是，当我在java邮件中使用上述设置时，我收到以下异常。

The smtp credentials have been verified by telnetting to my smtpHost with the above details. However, I get the following exception when I use the above settings in java mail.

        250-AUTH PLAIN LOGIN
        250-STARTTLS
        250 HELP
        DEBUG SMTP: Found extension "SIZE", arg "52428800"
        DEBUG SMTP: Found extension "8BITMIME", arg ""
        DEBUG SMTP: Found extension "PIPELINING", arg ""
        DEBUG SMTP: Found extension "AUTH", arg "PLAIN LOGIN"
        DEBUG SMTP: Found extension "STARTTLS", arg ""
        DEBUG SMTP: Found extension "HELP", arg ""
        DEBUG SMTP: Attempt to authenticate
        DEBUG SMTP: check mechanisms: LOGIN PLAIN DIGEST-MD5 NTLM
        DEBUG SMTP: AUTH LOGIN command trace suppressed
        DEBUG SMTP: AUTH LOGIN failed
        Nov 29, 2012 11:54:40 AM com.Test main
        SEVERE: null
        javax.mail.AuthenticationFailedException: 535 Incorrect authentication data

当我添加lin时e：

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

它再次生成相同的身份验证失败异常。

It again generates the same authentication failed exception.

如果我将 mail.smtp.starttls.enable 设置为 true ，则身份验证成功，但我收到以下异常：

If I set mail.smtp.starttls.enable to true, the authentication succeeds, but I get the following exception:

     220 TLS go ahead
     Nov 28, 2012 5:32:36 PM com.Test main
     SEVERE: null
     javax.mail.MessagingException: Could not convert socket to TLS;
     nested exception is:
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
    at com.sun.mail.smtp.SMTPTransport.startTLS(SMTPTransport.java:1918)
    at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:652)
    at javax.mail.Service.connect(Service.java:317)

经过各种各样的有关第二个异常的论坛帖子，我运行了InstallCert程序来获取服务器的自签名证书。 InstallCert 会引发以下异常：

After going through various forum threads regarding the second exception, I ran the InstallCert program to fetch the server's self-signed certificate. The InstallCert throws the following exception:

            Opening connection to mydomain.com.au:443...
            Starting SSL handshake...
            javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?
                    at sun.security.ssl.InputRecord.handleUnknownRecord(InputRecord.java:542)
                    at sun.security.ssl.InputRecord.read(InputRecord.java:374)
                    at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:850)
                    at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1190)
                    at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1217)
                    at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1201)
                    at InstallCert.main(InstallCert.java:100)
            Could not obtain server certificate chain

因此，看起来我的服务器没有ssl，但启用了starttls。使用STARTTLS将邮件发送到没有ssl的服务器的正确参数是什么？

So, looks like my server does not have ssl, but starttls is enabled. What are the correct parameters for sending mail with STARTTLS on, to a server with no ssl?

推荐答案

此JavaMail FAQ条目应该有所帮助。

尝试使用这样的MailSSLSocketFactory：

Try using MailSSLSocketFactory like this:

  MailSSLSocketFactory sf = new MailSSLSocketFactory();
  sf.setTrustAllHosts(true);
  props.put("mail.smtp.ssl.socketFactory", sf);

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