javax.mail.MessagingException：无法连接到SMTP主机：email-smtp.us-east-1.amazonaws.com，端口：25；

Question

public void emailTest（）{

    Properties properties=new Properties();
    properties.put("mail.smtp.host", "email-smtp.us-east-1.amazonaws.com"); 
    properties.put("mail.smtp.port", 587);
    properties.put("mail.debug", "true");
    try{
    Session session=Session.getInstance(properties);

    Message msg=new MimeMessage(session);  

    msg.setFrom(new InternetAddress("[email protected]", "Test"));
    msg.setRecipient(RecipientType.TO, new InternetAddress("[email protected]", "Test"));
    msg.setSubject("Test Subject");
    msg.setText("Test Mail");
    msg.saveChanges();
    Transport transport=session.getTransport("smtp");
    transport.connect("username","password");
    transport.sendMessage(msg, msg.getAllRecipients());

    transport.close();

    }catch(Exception e){
        e.printStackTrace();
    }
}

提供POM：com.sun.mail javax.mail 1.5.2

DEBUG：JavaMail版本1.4ea

DEBUG：java.io.FileNotFoundException：/usr/java/jdk1.8.0_144/jre/lib/javamail.providers（无此类文件或目录）

DEBUG：！anyLoaded

调试：未加载资源：/META-INF/javamail.providers

调试：成功加载资源：/META-INF/javamail.default.providers

DEBUG：已加载的提供程序表

DEBUG：按类名列出的提供者：{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：按协议列出的提供者：{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。提供商[STORE，pop3，com.sun.mail.pop3.POP3Store，Sun Microsystems，Inc]，pop3s = javax.mail.Provider [提供商，STORE，pop3s，com.sun.mail.pop3.POP3SSLStore，Sun Microsystems，Inc]， smtp = javax.mail.Provider [TRANSPORT，smtp，com.sun.mail.smtp.SMTPTransport，Sun Microsystems，Inc]]] >>

调试：成功加载资源：/META-INF/javamail.default.address.map

DEBUG：！anyLoaded

调试：未加载资源：/META-INF/javamail.address.map

DEBUG：java.io.FileNotFoundException：/usr/java/jdk1.8.0_144/jre/lib/javamail.address.map（无此类文件或目录）

调试：getProvider（）返回javax.mail.Provider [TRANSPORT，smtp，com.sun.mail.smtp.SMTPTransport，Sun Microsystems，Inc]]

DEBUG SMTP：useEhlo true，useAuth false

[调试SMTP：尝试连接到主机“ email-smtp.us-east-1.amazonaws.com”，端口25，isSSL为false

public void emailTest（）{Properties properties = new Properties（）; properties.put（“ mail.smtp.host”，“ email-smtp.us-east-1.amazonaws.com”）; properties.put（“ mail.smtp.port”，587）; ...

Answer 1

您使用的是JavaMail的较旧版本；请尽可能更新。

[如果您在AWS中运行JavaMail程序，请注意AWS关于如何使用JavaMail和可以使用的SMTP主机有限制连接至。有关详细信息，请查阅其文档。 （对不起没有链接。）