我的网站基于JSP页面和servlet。我在我的vps上运行Tomcat 6.
我正在使用JavaMail 1.4版在我的网站上发送电子邮件。
我可以在会话期间发送几封电子邮件，但今天我的网站提交页面上有一个空白页面。所以我查看了Tomcat日志，这里发生了什么 -
INFO | jvm 1 | 2010/12/15 10:29:13 | DEBUG: setDebug: JavaMail version 1.4.1 INFO | jvm 1 | 2010/12/15 10:29:13 | DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc] INFO | jvm 1 | 2010/12/15 10:29:13 | DEBUG SMTP: useEhlo true, useAuth true INFO | jvm 1 | 2010/12/15 10:29:13 | DEBUG SMTP: trying to connect to host "smtp.myisprovider.net", port 25, isSSL false INFO | jvm 1 | 2010/12/15 10:29:14 | 421 4.7.1 - Connection Refused - - Too many connections INFO | jvm 1 | 2010/12/15 10:29:14 | DEBUG SMTP: could not connect to host "smtp.myisprovider.net", port: 25, response: 421 INFO | jvm 1 | 2010/12/15 10:29:14 | INFO | jvm 1 | 2010/12/15 10:29:14 | javax.mail.MessagingException: Could not connect to SMTP host: smtp.myisprovider.net, port: 25, response: 421 INFO | jvm 1 | 2010/12/15 10:29:14 | at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1379) INFO | jvm 1 | 2010/12/15 10:29:14 | at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:412) INFO | jvm 1 | 2010/12/15 10:29:14 | at javax.mail.Service.connect(Service.java:288) INFO | jvm 1 | 2010/12/15 10:29:14 | at javax.mail.Service.connect(Service.java:169) INFO | jvm 1 | 2010/12/15 10:29:14 | at spyder.servlets.email.MessageCenterServlet.cancelService(MessageCenterServlet.java:836) INFO | jvm 1 | 2010/12/15 10:29:14 | at spyder.servlets.email.MessageCenterServlet.doPost(MessageCenterServlet.java:172) INFO | jvm 1 | 2010/12/15 10:29:14 | at spyder.servlets.email.MessageCenterServlet.doGet(MessageCenterServlet.java:39) INFO | jvm 1 | 2010/12/15 10:29:14 | at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) INFO | jvm 1 | 2010/12/15 10:29:14 | at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) INFO | jvm 1 | 2010/12/15 10:29:14 | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) INFO | jvm 1 | 2010/12/15 10:29:14 | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) INFO | jvm 1 | 2010/12/15 10:29:14 | at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) INFO | jvm 1 | 2010/12/15 10:29:14 | at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) INFO | jvm 1 | 2010/12/15 10:29:14 | at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) INFO | jvm 1 | 2010/12/15 10:29:14 | at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) INFO | jvm 1 | 2010/12/15 10:29:14 | at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) INFO | jvm 1 | 2010/12/15 10:29:14 | at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) INFO | jvm 1 | 2010/12/15 10:29:14 | at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:190) INFO | jvm 1 | 2010/12/15 10:29:14 | at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:291) INFO | jvm 1 | 2010/12/15 10:29:14 | at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:774) INFO | jvm 1 | 2010/12/15 10:29:14 | at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:703) INFO | jvm 1 | 2010/12/15 10:29:14 | at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:896) INFO | jvm 1 | 2010/12/15 10:29:14 | at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:690) INFO | jvm 1 | 2010/12/15 10:29:14 | at java.lang.Thread.run(Thread.java:595)
我通过 MY ISP提供商发送电子邮件。我在家里用于互联网的那个。这 与我的VPS运行的提供商相同。
这个问题是我的ISP提供商的结果以及他们的结果设置的结果，还是这与我的servlet中的代码有关？
日志说“连接太多”，所以最初我想知道这是不是我的结果，如果有什么我应该关闭（在servlet中，在发送电子邮件后调用close（）方法？）
Transport t = null;
try {
//get email address to send
//this email to
rs = stmt.executeQuery("Select Tech_Support_Email,POP3,SMTP from sitewide_info");
String toName = "mywebsite.com";
String host_email_address = "";
String POP3 = "";
String SMTP = "";
if(rs.next()) {
host_email_address = rs.getString(1);
POP3 = rs.getString(2);
SMTP = rs.getString(3);
}
// Specify the SMTP Host
Properties props = new Properties();
//props.put(POP3, SMTP);
props.setProperty("mail.smtp.auth", "true");
props.put("mail.pop3.host", POP3);
props.put("mail.smtp.host", SMTP);
// Create a mail session
Session ssn = Session.getInstance(props, null);
ssn.setDebug(true);
//...
//query db for some information, that will be appended to email
//...
// set the from information
InternetAddress from = new InternetAddress(fromEmail, fromName);
// set the to information
InternetAddress to = new InternetAddress(host_email_address, toName);
// Create the message
Message msg = new MimeMessage(ssn);
msg.setFrom(from);
msg.addRecipient(Message.RecipientType.TO, to);
msg.addHeader("X-Priority", "1");
msg.setSubject(Subject);
msg.setContent(HtmlMessage, "text/html");
String protocol = "smtp";
t = ssn.getTransport(protocol);
t.connect(SMTP,username,password);
t.sendMessage(msg, msg.getAllRecipients());
res.sendRedirect(res.encodeRedirectURL("MyAccount.jsp?message=Email%20successfully%20sent."));
return;
}//try
catch (MessagingException mex) {
mex.printStackTrace();
}
catch(Exception e) {}
finally {
try {
t.close();
}
catch(Exception e) {}
}//finally
答案 0 :(得分：2)
我假设您在某处有一段代码：
Transport transport = session.getTransport("smtp");
transport.connect();
transport.sendMessage(message, message.getAllRecipients());
transport.close();
你在调用close方法吗？
此外，拨打此频率的频率是多少？它可能只是您的提供商实施垃圾邮件预防。
答案 1 :(得分：0)
/*SIMPLE EMAIL TO GMAIL OR YAHOO MAIL USING JAVA*/
import java.awt.HeadlessException;
import java.util.Properties;
import javax.mail.Address;
import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
public class JavaMail {
public static void main(String args[]) {
new JavaMail().email();
}
public void email() {
String from = "your_email@domain.com";
String password = "your_secret_password";
String to = "email_to@domain.com";
String subject = "email_subject";
String msg = "email_message";
Properties properties = System.getProperties();
properties = setProp(from, to);
Session session = Session.getDefaultInstance(properties);
try {
Address address = new InternetAddress(to, "LovenishGoyal");
MimeMessage message = new MimeMessage(session);
message.setFrom(address);
message.addRecipient(Message.RecipientType.TO, address);
message.setSubject(subject);
message.setText(msg);
message.saveChanges();
Transport transport = session.getTransport();
System.out.println("connecting...");
transport.connect(from, password);
System.out.println("connected!");
System.out.println("sending...");
transport.sendMessage(message, message.getAllRecipients());
transport.close();
System.out.println("Sent message successfully....");
} catch (Exception mex) {
mex.printStackTrace();
}
}
private Properties setProp(String email, String targetEmail) {
Properties props = null;
try {
props = System.getProperties();
if (email.contains(",") || targetEmail.contains(",")) {
System.out.println("Please send one email to one person at a time...");
} else if (email.contains("@yahoo.com")) {
props.put("mail.smtp.host", "smtp.mail.yahoo.com");
props.put("mail.smtp.socketFactory.port", "465");
props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
props.put("mail.smtp.host", "smtp.mail.yahoo.com");
props.put("mail.smtp.auth", true);
} else if (email.contains("@gmail.com")) {
props.put("mail.smtp.host", "smtp.gmail.com");
props.put("mail.smtp.socketFactory.port", "465");
props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.port", "465");
} else {
System.out.println("Your Email Address is invalid\n or host not supported!");
}
} catch (HeadlessException exp) {
System.out.println(exp);
}
return props;
}
}