java - 无法使用 SMTP 在 java 中发送电子邮件，它被我办公室的防火墙阻止了。我们可以通过其他方法发送邮件吗？

Question

有2个java文件和一个xml文件。无法使用 smtp 发送电子邮件。请帮助:

Springmail.xml

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">

    <bean id="mailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl">
        <property name="host" value="smtp.office365.com" />
        <property name="port" value="587" />

        <property name="protocol" value="smtps" />

        <property name="username" value="xxxxx@xyz.com" />
        <property name="password" value="xxxxxx" />

        <property name="javaMailProperties">
            <props>
                <prop key="mail.smtps.auth">true</prop>
                <prop key="mail.smtps.starttls.enable">true</prop>

                <prop key="mail.smtp.ssl.enable">true</prop>
                <prop key="mail.transport.protocol">smtps</prop> 

<!--                <prop key="mail.transport.protocol.rfc822">smtps</prop> -->

                <prop key="mail.debug">true</prop>

                <prop key="mail.smtps.quitwait">false</prop>

                <prop key="mail.smtps.socketFactory.class">javax.net.ssl.SSLSocketFactory</prop>
                <prop key="mail.smtps.socketFactory.fallback">false</prop>

                <prop key="mail.smtp.timeout">30000</prop>
            </props>
        </property>

    </bean>

    <bean id="mailMail" class="com.mkyong.common.MailMail">
        <property name="mailSender" ref="mailSender" />
        <property name="simpleMailMessage" ref="customeMailMessage" />
    </bean>

    <bean id="customeMailMessage"
        class="org.springframework.mail.SimpleMailMessage">

        <property name="from" value="xxxxx@xyz.com" />
        <property name="to" value="xxxxx@xyz.com" />
        <property name="subject" value="Testing Subject" />
        <property name="text">
        <value>
            <![CDATA[
                Dear %s,
                Mail Content : %s
            ]]>
        </value>
    </property>
    </bean>

</beans>

邮件邮件.java有2个java文件和一个xml文件。无法使用 smtp 发送电子邮件。请帮忙

package com.mkyong.common;

import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;

import org.springframework.core.io.FileSystemResource;
import org.springframework.mail.MailParseException;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;

public class MailMail
{
    private JavaMailSender mailSender;
    private SimpleMailMessage simpleMailMessage;

    public void setSimpleMailMessage(SimpleMailMessage simpleMailMessage) {
        this.simpleMailMessage = simpleMailMessage;
    }

    public void setMailSender(JavaMailSender mailSender) {
        this.mailSender = mailSender;
    }

    public void sendMail(String dear, String content) {

        MimeMessage message = mailSender.createMimeMessage();

        try{
            MimeMessageHelper helper = new MimeMessageHelper(message, true);

            helper.setFrom(simpleMailMessage.getFrom());
            helper.setTo(simpleMailMessage.getTo());
            helper.setSubject(simpleMailMessage.getSubject());
            helper.setText(String.format(
                    simpleMailMessage.getText(), dear, content));

            FileSystemResource file = new FileSystemResource(
                    "C:\\vivek\\BDD_13thMay\\cucumber.json");

            helper.addAttachment(file.getFilename(), file);


        }catch (MessagingException e) {
            throw new MailParseException(e);
        }
        mailSender.send(message);


    }


}

应用程序.java

package com.mkyong.common;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class App 
{
    public static void main( String[] args )
    {
        ApplicationContext context = new ClassPathXmlApplicationContext("Spring-Mail.xml");

        MailMail mm = (MailMail) context.getBean("mailMail");
        mm.sendMail("Yong Mook Kim", "This is text content");
    }
}

控制台显示以下详细信息:有2个java文件和一个xml文件。无法使用 smtp 发送电子邮件。请帮忙

Jun 09, 2015 12:59:19 PM org.springframework.context.support.ClassPathXmlApplicationContext prepareRefresh
INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@6041f871: display name [org.springframework.context.support.ClassPathXmlApplicationContext@6041f871]; startup date [Tue Jun 09 12:59:19 IST 2015]; root of context hierarchy
Jun 09, 2015 12:59:20 PM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from class path resource [Spring-Mail.xml]
Jun 09, 2015 12:59:21 PM org.springframework.context.support.ClassPathXmlApplicationContext obtainFreshBeanFactory
INFO: Bean factory for application context [org.springframework.context.support.ClassPathXmlApplicationContext@6041f871]: org.springframework.beans.factory.support.DefaultListableBeanFactory@4ce1bafc
Jun 09, 2015 12:59:21 PM org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons
INFO: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@4ce1bafc: defining beans [mailSender,mailMail,customeMailMessage]; root of factory hierarchy
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,smtps,com.sun.mail.smtp.SMTPSSLTransport,Sun Microsystems, Inc]
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: trying to connect to host "smtp.office365.com", port 587, isSSL true
Exception in thread "main" org.springframework.mail.MailSendException: Mail server connection failed; nested exception is javax.mail.MessagingException: Could not connect to SMTP host: smtp.office365.com, port: 587;
  nested exception is:
    java.net.ConnectException: Connection timed out: connect
    at org.springframework.mail.javamail.JavaMailSenderImpl.doSend(JavaMailSenderImpl.java:419)
    at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:342)
    at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:338)
    at com.mkyong.common.MailMail.sendMail(MailMail.java:47)
    at com.mkyong.common.App.main(App.java:13)
Caused by: javax.mail.MessagingException: Could not connect to SMTP host: smtp.office365.com, port: 587;
  nested exception is:
    java.net.ConnectException: Connection timed out: connect
    at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1934)
    at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:638)
    at javax.mail.Service.connect(Service.java:295)
    at org.springframework.mail.javamail.JavaMailSenderImpl.doSend(JavaMailSenderImpl.java:389)
    ... 4 more
Caused by: java.net.ConnectException: Connection timed out: connect
    at java.net.DualStackPlainSocketImpl.connect0(Native Method)
    at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:579)
    at sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:625)
    at sun.security.ssl.BaseSSLSocketImpl.connect(BaseSSLSocketImpl.java:160)
    at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:288)
    at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:205)
    at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1900)
    ... 7 more

Answer 1

我可以使用 telnet 连接到 587 端口上的 office365.com，另一端有一个邮件服务器。

(在 linux 上，我运行“telnet office365.com 587”...)

显然您无法连接。或者至少，您正在运行的 Java 应用程序无法连接。

最可能的解释是防火墙阻止了传出连接:

• 检查您计算机的防火墙规则。

• 如果您是在家中执行此操作，请检查您的路由器/调制解调器的防火墙规则。如果失败，请与您的 ISP 联系。

• 如果您是在工作单位(或学校)执行此操作，请咨询您的网络管理员。