错误在通过JSP发送电子邮件（SMTP EXIM）
问题描述：
Properties props = new Properties();
props.put("mail.smtp.host", "mail.xxx.net");
props.put("mail.smtp.port","25");
props.put("mail.smtp.ssl.enable", "false");
props.put("mail.debug", "true");
props.put("mail.smtp.debug", "true");
props.put ("mail.smtp.starttls.enable", "true");
props.put("mail.transport.protocol", "smtp");
props.put("mail.smtp.socketFactory.port", "587");
props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
props.put("mail.smtp.socketFactory.fallback", "false");
java.security.Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
Authenticator auth = new javax.mail.Authenticator() {
protected PasswordAuthentication getPasswordAuthentication(){
return new PasswordAuthentication("[email protected]", "xxx");
}
};
Session s = Session.getInstance(props,auth);
MimeMessage message = new MimeMessage(s);
InternetAddress from = new InternetAddress("[email protected]");
message.setFrom(from);
InternetAddress to = new InternetAddress("[email protected]");
message.addRecipient(Message.RecipientType.TO, to);
message.setSubject("Test from JavaMail.");
//message.setText("Hello from JavaMail!");
message.setContent("Hello from JavaMail!", "text/plain");
message.saveChanges();
Transport transport = s.getTransport("smtp");
transport.connect("mail.xxx.net","[email protected]","xxx");
transport.sendMessage(message,message.getAllRecipients());
transport.close();
但我得到了一个错误：错误在通过JSP发送电子邮件（SMTP EXIM）
The server encountered an internal error() that prevented it from fulfilling this request.
堆栈跟踪：
org.apache.jasper.JasperException: javax.servlet.ServletException: javax.mail.MessagingException: Could not connect to SMTP host: mail.xxx.net, port: 25;
nested exception is:
javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:549)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:455)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
根源：
javax.servlet.ServletException: javax.mail.MessagingException: Could not connect to SMTP host: mail.xxx.net, port: 25;
nested exception is:
javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:911)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:840)
org.apache.jsp.index_jsp._jspService(index_jsp.java:87)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
当我排除代码SSL和TSL
& DEBUG结果
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.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,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc]
DEBUG SMTP: useEhlo true, useAuth false
DEBUG SMTP: trying to connect to host "mail.xxx.net", port 25, isSSL false
Mar 23, 2013 8:52:13 AM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [jsp] in context with path [/KKS] threw exception [javax.servlet.ServletException: javax.mail.MessagingException: Could not connect to SMTP host: mail.xxx.net, port: 25;
nested exception is:
java.net.ConnectException: Connection timed out: connect] with root cause
java.net.ConnectException: Connection timed out: connect
答
是您的SMTP服务器设置为允许匿名连接？删除SSL后，您将auth设置为false，因此您的客户端不会将登录名/密码传递到SMTP服务器。这很好，只要你的SMTP服务器允许匿名连接。
另外，您的网络/ SMTP服务器是否支持IP6？如果您的客户端支持IP6，则更高版本的Java默认为IP6，但许多SMTP服务器都配置为IP4。请参阅此文章Sending email using JSP了解如何让您的JVM强制实施IP4。这需要在JVM实例化时设置。
为什么要在属性'props.put（“mail.smtp.socketFactory.class”，“javax.net.ssl.SSLSocketFactory”）中添加SSLSocketFactory？'当您连接到SMTP端口25时？端口25通常是普通的套接字，不支持SSL。 – 2013-03-22 17:25:17
你的意思是说我可以禁用 props.put（“mail.smtp.socketFactory.port”，“587”）; props.put（“mail.smtp.socketFactory.class”，“javax.net.ssl.SSLSocketFactory”）; props.put（“mail.smtp.socketFactory.fallback”，“false”）; – Danish 2013-03-22 17:27:11
如果我禁用我得到以下错误：javax.net.ssl.SSLException：无法识别的SSL消息，明文连接？]与根本原因 javax.net.ssl.SSLException：无法识别的SSL消息，明文连接？ – Danish 2013-03-22 17:29:24