我有两段相似的代码，分别用 java 和 php 编写。由于证书错误，PHP 没有发送电子邮件 -

  Connection failed. Error #2: stream_socket_enable_crypto():
  Peer certificate CN=*.hosting.com' did not match
  expected CN=smtp.anotherhosting.com'

但是java代码发送邮件没有任何问题，我不明白为什么。 (我到处都看到问题 - how to skip ssl checks with java?

代码如下:

PHP:

<?php
    require './PHPMailer.php';
    require './SMTP.php';

    use PHPMailer\PHPMailer\PHPMailer;

    $mail = new PHPMailer(true);
    try {
        $mail->SMTPDebug = 4;
        $mail->isSMTP();
        $mail->Host = 'smtp.anotherhosting.com';
        $mail->SMTPAuth = true;
        $mail->Username = 'username@anotherhosting.com';
        $mail->Password = 'password';
        $mail->SMTPSecure = 'tls';
        $mail->Port = 587;

        //Recipients
        $mail->setFrom('from@company.com');
        $mail->addAddress('myemail@company.com');
        $mail->isHTML(true);
        $mail->Subject = 'Here is the subject12';
        $mail->Body    = 'This is the HTML message bo22dy <b>in bold!</b>';

        $mail->send();
        echo 'Message has been sent';
    } catch (Exception $e) {
        echo 'Message could not be sent. Mailer Error: ', $mail->ErrorInfo;
    }
    try {
        $mail->smtpClose();
    } catch (Exception $e) {
        echo $e->getTraceAsString();
    }

和java:

import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.util.Properties;

public class Main {
    public static void main(String[] args) {
        final String username = "username@anotherhosting.com";
        final String password = "password";

        Properties props = new Properties();
        props.put("mail.smtp.auth", "true");
        props.put("mail.smtp.starttls.enable", "true");
        props.put("mail.smtp.host", "smtp.anotherhosting.com");
        props.put("mail.smtp.port", "587");

        Session session = Session.getInstance(props,
                new javax.mail.Authenticator() {
                    protected PasswordAuthentication getPasswordAuthentication() {
                        return new PasswordAuthentication(username, password);
                    }
                });

        session.setDebug(true);
        try {

            Message message = new MimeMessage(session);
            message.setFrom(new InternetAddress("from@company.com"));
            message.setRecipients(Message.RecipientType.TO,
                    InternetAddress.parse("myemail@company.com"));
            message.setSubject("Testing Subject");
            message.setText("Dear Mail Crawler,"
                    + "\n\n No spam to my email, please!");

            Transport.send(message);

            System.out.println("Done");

        } catch (MessagingException e) {
            throw new RuntimeException(e);
        }
    }
}

我的任务是使用 PHP 代码实现电子邮件发送功能。从我目前的角度来看，它失败是因为 smtp 从一台主机重定向到另一台主机。最有可能的是，phpmailer 获得了 host1，接收重定向到 host2，从 host2 获取证书并将该证书与 host1 进行比较。同时，java 客户端做的一切都很好。如果有人知道如何解决此类问题，请告诉我。

此外，php 代码在 line 402 上失败当它尝试调用 stream_socket_enable_crypto 时.

这是日志文件: java:

DEBUG: setDebug: JavaMail version 1.4ea
DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc]
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: trying to connect to host "smtp.anotherhosting.com", port 587, isSSL false
220 mailpod.hosting.com ESMTP
DEBUG SMTP: connected to host "smtp.anotherhosting.com", port: 587

EHLO degr [most probably my computer name]
250-mailpod.hosting.com
250-STARTTLS
250-PIPELINING
250-8BITMIME
250-SIZE 65000000
250 AUTH LOGIN PLAIN CRAM-MD5
DEBUG SMTP: Found extension "STARTTLS", arg ""
DEBUG SMTP: Found extension "PIPELINING", arg ""
DEBUG SMTP: Found extension "8BITMIME", arg ""
DEBUG SMTP: Found extension "SIZE", arg "65000000"
DEBUG SMTP: Found extension "AUTH", arg "LOGIN PLAIN CRAM-MD5"
STARTTLS
220 ready for tls
EHLO degr
250-mailpod.hosting.com
250-PIPELINING
250-8BITMIME
250-SIZE 65000000
250 AUTH LOGIN PLAIN CRAM-MD5
DEBUG SMTP: Found extension "PIPELINING", arg ""
DEBUG SMTP: Found extension "8BITMIME", arg ""
DEBUG SMTP: Found extension "SIZE", arg "65000000"
DEBUG SMTP: Found extension "AUTH", arg "LOGIN PLAIN CRAM-MD5"
DEBUG SMTP: Attempt to authenticate
AUTH LOGIN
334 [auth hash here]
[auth hash here]
334 [auth hash here]
[auth hash here]
235 ok, go ahead (#2.0.0)
DEBUG SMTP: use8bit false
MAIL FROM:<from@company.com>
250 ok
RCPT TO:<myemail@company.com>
250 ok
DEBUG SMTP: Verified Addresses
DEBUG SMTP:   myemail@company.com
DATA
354 go ahead
From: from@company.com
To: myemail@company.com
Message-ID: <1338668845.01537892151523.JavaMail.myemail@company.com>
Subject: Testing Subject
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit

Dear Mail Crawler,

 No spam to my email, please!
.
250 ok 1537892155 qp 173024
QUIT
221 mailpod.hosting.com
Done

PHP:

2018-09-25 16:26:35 Connection: opening to smtp.anotherhosting.com:587, timeout=300, options=array()
2018-09-25 16:26:35 Connection: opened
2018-09-25 16:26:35 SMTP INBOUND: "220 mailpod.hosting.com ESMTP"
2018-09-25 16:26:35 SERVER -> CLIENT: 220 mailpod.hosting.com ESMTP
2018-09-25 16:26:37 CLIENT -> SERVER: EHLO localhost
2018-09-25 16:26:38 SMTP INBOUND: "250-mailpod.hosting.com"
2018-09-25 16:26:38 SMTP INBOUND: "250-STARTTLS"
2018-09-25 16:26:38 SMTP INBOUND: "250-PIPELINING"
2018-09-25 16:26:38 SMTP INBOUND: "250-8BITMIME"
2018-09-25 16:26:38 SMTP INBOUND: "250-SIZE 65000000"
2018-09-25 16:26:38 SMTP INBOUND: "250 AUTH LOGIN PLAIN CRAM-MD5"
2018-09-25 16:26:38 SERVER -> CLIENT: 250-mailpod.hosting.com250-STARTTLS250-PIPELINING250-8BITMIME250-SIZE 65000000250 AUTH LOGIN PLAIN CRAM-MD5
2018-09-25 16:26:38 CLIENT -> SERVER: STARTTLS
2018-09-25 16:26:38 SMTP INBOUND: "220 ready for tls"
2018-09-25 16:26:38 SERVER -> CLIENT: 220 ready for tls
2018-09-25 16:26:38 Connection failed. Error #2: stream_socket_enable_crypto(): Peer certificate CN=*.hosting.com' did not match expected CN=smtp.anotherhosting.com' [C:\project\SMTP.php line 402]
SMTP Error: Could not connect to SMTP host.
2018-09-25 16:26:39 CLIENT -> SERVER: QUIT
2018-09-25 16:26:39 
2018-09-25 16:26:39 
2018-09-25 16:26:39 
2018-09-25 16:26:39 Connection: closed
SMTP Error: Could not connect to SMTP host.
Message could not be sent. Mailer Error: SMTP Error: Could not connect to SMTP host.

https://www.networksolutions.com/提供的PS smpt服务

最佳答案

没错。因此，您的 Java 代码有一个允许中间人攻击成功的错误。在 PHP 中，它通过完全按照 TLS 的设计目的成功地防止了这种情况。

正在发生的是在您的 ISP 防火墙处进行的 TCP 重定向，这对两个客户端都是不可见的。您可以禁用证书检查(如 the troubleshooting guide 中所述)，但您真的不应该这样做。要么明确连接到正确的名称 (mailpod.hosting.com)，要么使用不会篡改您的流量的托管服务提供商。

关于java - 发送电子邮件 phpmailer 和 javax.mail，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/52502921/