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Can't receive mail from POP3 GMAIL by using Javamail, get SSLHandshakeException

I have JAVA application which work as service on Tomcat server. I need to develope service for receiving mail from GMAIL pop3 server. I use Javamail. I have written usual code, but when I deploy it on server I am getting
javax.mail.MessagingException: Connect failed;
nested exception is:
javax.net.ssl.SSLHandshakeException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
As for development my Tomcat started on Localhost.
And this problemm looks like concerned with certificate.
My code is
public void downloadMail() {
try {
// connects to the message store and opens the inbox folder
Store store = session.getStore(protocol);
store.connect(username, password);
Folder folderInbox = store.getFolder(inbox);
folderInbox.open(Folder.READ_WRITE);
// fetches new messages from server
Message[] messages = folderInbox.getMessages();
for (int i = 0; i < messages.length; i++) {
Mail mail = extractMail(messages[i]);
messages[i].setFlag(Flags.Flag.DELETED, true);
}
// disconnect
folderInbox.close(false);
store.close();
} catch (NoSuchProviderException ex) {
System.out.println( "No provider for pop3.");
ex.printStackTrace();
} catch (MessagingException ex) {
System.out.println( "Could not connect to the message store");
ex.printStackTrace();
} catch (IOException ex) {
System.out.println( "Can not save file or open directory");
ex.printStackTrace();
}
}
I am getting exception on line store.connect(username, password);
I use properties:
mail.pop3.host=pop.gmail.com
mail.pop3.port=995
mail.pop3.ssl.enable=true
mail.pop3.protocol=pop3
mail.pop3.inbox=INBOX
Please help me to solve this problem. I never worked with Tomcat and certificates before!

Login success on FTP over explicit SSL/TLS but unable to browse the files

I have been asked to make the secure FTP Server connection. FTP over explicit TLS/SSL. In order to achieve this, I have added a below line in the existing implementation. This is my FTPClient lib - it.sauronsoftware.ftp4j - version 1.6.1
ftpClient.setSecurity(FTPClient.SECURITY_FTPES);
// Existing code
ftpClient.setConnector(new HTTPTunnelConnector(proxyHost, proxyPort));
ftpClient.connect(getFtpHost(), getFtpPort());
ftpClient.login(getUsername(), getPassword());
ftpClient.setAutoNoopTimeout(30000);
When I deployed the code on JBOSS 5.1, I am getting successful connection, but I am unable to list the files in the root directory. we only have permission to access the root directory.
On the other hand, I have written a standalone client (java main program) - through which I can print the files present at FTP location, by this way I have ensured the secure connection and the files availability at FTP location. Here, I have used the
My problem is, when I make a secure connection through the deployed application I am getting the unable to locate any files at remote location. ie: FTPFiles.length is 0
Any help would be much appreciated, thank you!
Adding few more logs and info,
Normal Flow without FTPES security parameter added (current Implementation)
printing ftpClient.serverStatus()
msg: Status of 'FTP Service'
msg: Connected from ec2-xyz
msg: Logged in as <user>
msg: TYPE: BINARY, STRUcture: File, Mode: Stream
msg: Total bytes transferred for session: 10511
msg: No data connection
msg: End of status
printing ftpClient.serverStatus() With FTPES added
msg: Status of 'FTP Service'
msg: Connected from ec2-xyz
msg: Logged in as <user>
msg: TYPE: ASCII, STRUcture: File, Mode: Stream
msg: No data connection
msg: End of status
Few questions which I need to know answers (may be that give a lead to fix):
Here, TYPE: BINARY is changed to ASCII and can someone tell how to modify back to BINARY? Note tehre is no explicit setting made, got changed post FTPES set
Is this issue related to proxy / port. if so - I wont be able to provide those information.
As of now, I am testing with same proxy used which is used in the application.
Is there any certificates to be imported to get files viewed / downloaded.
Found this on net which is exactly same as my issue, http://www.proftpd.org/docs/howto/TLS.html ( search for -"I can login using FTPS, but I cannot see any directories. Why not?") but I need to explain my third party to make the required change... what should I tell?
stand alone client code
import it.sauronsoftware.ftp4j.*;
import javax.net.ssl.*;
import java.io.File;
import java.security.*;
import java.util.List;
public class FTPWithSSL {
private static FTPClient ftpClient;
private static FTPConfig ftpConfig;
private DailyFTPConfig config;
public static void main(String args[]) throws Exception {
ftpConfig = new FTPConfig("username", "password", "FTPServer.net", 21, setupConnector());
FTPDownloader ftpDownloader = new FTPDownloader(ftpConfig, new FTPDownloadController() {
#Override
public List<FTPFile> download(FTPClient ftpClient) throws Exception {
downloadFile(ftpClient);
System.out.println("download success");
return null;
}
});
try {
openConnection();
List<FTPFile> ftpFileList = ftpDownloader.download();
closeConnection();
} catch (Exception e) {
e.printStackTrace();
}
}
private static void openConnection() throws Exception {
System.out.println("OpenConnection method");
if (ftpClient == null) {
ftpClient = new FTPClient();
// Even if the below line is commented, the code works fine
ftpClient.setSSLSocketFactory(getSSLSocketFactory());
System.out.println("setting FTPES here");
ftpClient.setSecurity(FTPClient.SECURITY_FTPES);
ftpClient.setConnector(ftpConfig.getConnector());
ftpClient.connect(ftpConfig.getFtpHost(), ftpConfig.getFtpPort());
ftpClient.login(ftpConfig.getUsername(), ftpConfig.getPassword());
ftpClient.setAutoNoopTimeout(30000);
System.out.println("ftpClient.isConnected() " + ftpClient.isConnected());
}
}
private static SSLSocketFactory getSSLSocketFactory() throws Exception {
TrustManager[] trustManager = new TrustManager[] { new X509TrustManager() {
public X509Certificate[] getAcceptedIssuers() {
return null;
}
public void checkClientTrusted(X509Certificate[] certs, String authType) {
}
public void checkServerTrusted(X509Certificate[] certs, String authType) {
}
} };
SSLContext sslContext = null;
try {
sslContext = SSLContext.getInstance("SSL");
sslContext.init(null, trustManager, new SecureRandom());
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (KeyManagementException e) {
e.printStackTrace();
}
SSLSocketFactory sslSocketFactory = sslContext.getSocketFactory();
return sslSocketFactory;
}
private static void closeConnection() throws Exception {
System.out.println("ftpClient.serverStatus() -- ");
for (String serverStatus : ftpClient.serverStatus()) {
System.out.println(" msg: " + serverStatus);
}
if (ftpClient != null && ftpClient.isConnected()) {
ftpClient.disconnect(false);
}
}
private static void downloadFile(FTPClient ftpClient) throws Exception {
System.out.println("ftpsClient.currentDirectory() " + ftpClient.currentDirectory());
FTPFile[] ftpFile = ftpClient.list();
System.out.println("Name " + ftpFile[0].getName());
System.out.println("Link " + ftpFile[0].getLink());
System.out.println("Modified Date " + ftpFile[0].getModifiedDate());
String[] listnames = ftpClient.listNames();
System.out.println("ftpsClient.listNames() " +listnames);
System.out.println("ftpsClient.currentDirectory() " + ftpClient.list());
File file = new File( "C:\\opt\\copycat\\a1234.zip");
System.out.println("Downloading File: [" + file.getName() + "] has started.");
ftpClient.download("a1234.zip", file);
System.out.println("Downloading File: has Completed");
}
private static FTPConnector setupConnector() {
FTPConnector connector = new DirectConnector();
String proxyHost = "amazonaws.com";
if (proxyHost != null) {
System.out.println("proxy host NOT NULL");
int proxyPort = Integer.parseInt("123");
connector = new HTTPTunnelConnector(proxyHost, proxyPort);
}
return connector;
}
}

Finally, I am able to make the secure connection and able to download the latest files from FTP server using FTPES (FTP over explicit TLS/SSL).
I have made only 2 line code changes (below), in the actual implementation. earlier it was having the list() method to get the files from FTP server, and its return type is FTPFile[]
This is the code changes which I made, and other line of codes are modified / removed.
ftpClient.setSecurity(FTPClient.SECURITY_FTPES);
// get the FTP connection
String[] fileNames = ftpClient.listNames();
// Exisitng implementation
FTPFile[] ftpFiles = ftpClient.list("*.zip");
// after that there is an implementation for getting the latest files using the Comparator<FTPFile>
There was an issue with the LIST command's output, ie: LIST *.zip is not giving the correct output (I guess)

FTPSClient.listFiles() not working for NonStop/Tandem System

I am writing a small FTPS client that will download Enscribe files from NonStop/Tandem and will be processes in Windows. I am using the Apache Commons Net API to achieve this.
I am able to download and upload files from and to NonStop/Tandem. But I am not able to list the files and the directories using the listFiles() and/or mlistDir() methods present under org.apache.commons.net.ftp.FTPClient class.
Below is my code to list the files present in the current working directory.
FTPSClient client = new FTPSClient(false);
try {
client.connect(serverAddress, serverPort);
if (FTPReply.isPositiveCompletion(client.getReplyCode())) {
if (client.login(userName, passwd)) {
System.out.println(client.getReplyString());
// Set protection buffer size
client.execPBSZ(0);
// Set data channel protection to private
client.execPROT("P");
// Enter local passive mode
client.enterLocalPassiveMode();
// Get Current Working Directory
client.printWorkingDirectory();
System.out.println(client.getReplyString());
FTPFile[] files = client.listFiles();
// Logout
client.logout();
System.out.println(client.getReplyString());
} else {
System.out.println("Login failed...");
}
// Disconnect from Server
client.disconnect();
System.out.println("Disconnected from Host...");
} else {
System.out.println("Connection to Host failed...");
System.out.println("Error Code - " + reply);
}
} catch (Exception e) {
e.printStackTrace();
}
I get the following error while executing the code:
org.apache.commons.net.ftp.parser.ParserInitializationException: Unknown parser type: Nonstop J-series Server : J06.19.
at org.apache.commons.net.ftp.parser.DefaultFTPFileEntryParserFactory.createFileEntryParser(DefaultFTPFileEntryParserFactory.java:169)
at org.apache.commons.net.ftp.parser.DefaultFTPFileEntryParserFactory.createFileEntryParser(DefaultFTPFileEntryParserFactory.java:94)
at org.apache.commons.net.ftp.FTPClient.__createParser(FTPClient.java:3377)
at org.apache.commons.net.ftp.FTPClient.initiateListParsing(FTPClient.java:3334)
at org.apache.commons.net.ftp.FTPClient.listFiles(FTPClient.java:3012)
at org.apache.commons.net.ftp.FTPClient.listFiles(FTPClient.java:3065)
at com.connect.ssl.FTPSTest.main(FTPSTest.java:57)
I even tried to set the FTPClient configuration as UNIX as below, but it didn't helped.
client.configure(new FTPClientConfig(FTPClientConfig.SYST_UNIX));
Can anyone help me with this.

Connect to local POP3 inbox Java

I am trying to connect to locally hosted email POP3 inbox and display emails in the mailbox, but I keep getting error:
Exception in thread "main" javax.mail.MessagingException: Connect failed;
nested exception is:
java.net.ConnectException: Connection refused
at com.sun.mail.pop3.POP3Store.protocolConnect(POP3Store.java:209)
at javax.mail.Service.connect(Service.java:295)
at javax.mail.Service.connect(Service.java:176)
at com.kami.utils.MailClient.checkInbox(MailClient.java:33)
at com.kami.Main.main(Main.java:38)
My class looks like this:
public class MailClient {
private String host;
private String username;
private String password;
private String provider;
protected Session session;
public MailClient() {
Properties props = new Properties();
this.host = "localhost";
this.username = "unix-user";
this.password = "unix-password";
this.provider = "pop3";
this.session = Session.getDefaultInstance(props, null);
}
public void checkInbox() throws MessagingException, IOException {
Store store = session.getStore(provider);
store.connect(host, username, password); //This is line 33
Folder inbox = store.getFolder("inbox");
inbox.open(Folder.READ_ONLY);
Message[] messages = inbox.getMessages();
for(Message message : messages){
System.out.println(message.getReceivedDate());
System.out.println(message.getSubject());
}
inbox.close(true);
store.close();
}
}
It is locally hosted email server using Dovecot IMAP/POP3 Server Version 2.2.9 and Postfix Mail Server Postfix version 2.11.0

First telnet 110 port in your machine to check if the service is running there. In my laptop i don't have a pop3 server running, and this is the result:
hans#andes:~$ telnet localhost 110
Trying 127.0.0.1...
telnet: Unable to connect to remote host: Connection refused
If the connection succeed, follow the protocol authentication of pop3 with your own data:
hans#andes:~$ telnet mail.foo.com 110
Trying X.X.X.X...
Connected to mail.foo.com.
Escape character is '^]'.
+OK mail.foo.com POP3 server ready
user fooUser
+OK hello fooUser, please enter your password
pass fooPassword
+OK server ready
In your case telnet localhost; note too that you only should issue the commands: telnet, user and pass. The rest is the response from the server.
If all this works, the problem is on something with your java configuration, check the documentation and samples from the library.

The below method will fetch messages from a pop mailbox (given _Host=localhost, _User=unix-user, _Password=unix-password, _Protocol="pop3"). However you must be sure of a few things:
1) "localhost" is running a "pop3" server and not a "pop3s" (secure protocol) server;
2) the "pop3" server on "localhost" is listening on the default port
3) "unix-user" has a pop3 mailbox
Based on your follow-up, it seems like you are expecting to be able to send mail from the pop3 account. This is not how it works as pop3 is only a way to retrieve messages, not send them. To send mail, you need to establish a separate connection to an SMTP server.
public Message[] getMessages(int maxCount)
throws MessagingException
{
// Get a Session object
Properties props = new Properties();
Session session = Session.getInstance(props);
// Get a Store object
Store store = session.getStore(_protocol);
// Connect
store.connect(_host,_user,_password);
// Open a Folder
Folder folder = store.getFolder(_mailbox);
if (folder == null || !folder.exists())
throw new ApplicationException("Invalid mailbox");
//Gets up to maxCount messages from the pop box
folder.open(Folder.READ_WRITE);
Message[] messages = Monitor.EMPTY_MESSAGE_ARRAY;
int toMessageIndex=folder.getMessageCount();
if (toMessageIndex > 0) {
if (toMessageIndex > maxCount)
toMessageIndex = maxCount;
messages = folder.getMessages(1,toMessageIndex);
}
// Go through all the new messages and make sure they are loaded. Use the outputStream
//to force all information to be downloaded.
ByteArrayOutputStream bos = new ByteArrayOutputStream();
for (int i = 0; i < messages.length && shouldRun(); i++) {
try {
//Force the download of all message information
bos.reset();
messages[i].writeTo(bos);
getLog().enter(
this,
"[readAndClearInBox] Read message to " + messages[i].getAllRecipients()[0].toString());
} catch (Exception mex) {
getLog().error(this, mex, "[readAndClearInBox] Message exception");
StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw, true);
try {
Monitor.dumpEnvelope(getLog(), pw, messages[i]);
} catch (Exception ex) {
getLog().error(this, mex, "[readAndClearInBox] Could only display faulty message.");
} finally {
pw.flush();
getLog().enter(this, "[readAndClearInBox]" + sw.toString());
}
} finally {
//Mark the message for deletion
messages[i].setFlag(Flags.Flag.DELETED, true);
}
}
//Close folder and expunge all deleted messages, unless the read was aborted
if (shouldRun()) {
getLog().enter(this,"Found " + messages.length + " messages; closing inbox.");
folder.close(true);
store.close();
return messages;
} else {
getLog().enter(this,"Found " + messages.length + " messages; closing inbox without expunging.");
folder.close(false);
store.close();
_bShouldRun = true;
return Monitor.EMPTY_MESSAGE_ARRAY;
}
}

vysper server login fail

I'm making a vysper xmpp server.
Here's my code:
public static void main(String[] args) throws Exception {
XMPPServer server = new XMPPServer("myserver.org");
StorageProviderRegistry providerRegistry = new MemoryStorageProviderRegistry();
AccountManagement accountManagement = (AccountManagement) providerRegistry.retrieve(AccountManagement.class);
Entity user = EntityImpl.parseUnchecked("user#myserver.org");
accountManagement.addUser(user, "password");
server.setStorageProviderRegistry(providerRegistry);
server.addEndpoint(new TCPEndpoint())
server.setTLSCertificateInfo(new File("keystore.jks"), "boguspw");
//server.setTLSCertificateInfo(new File("bogus_mina_tls.cert"), "boguspw");
server.start();
System.out.println("Vysper server is running...");
server.addModule(new EntityTimeModule());
server.addModule(new VcardTempModule());
server.addModule(new XmppPingModule());
server.addModule(new PrivateDataModule());
}
I've tried both certificate files. (keystore.jks,bogus_mina_tls.cert)
After I start the server, it connects to it, and tries to login but it can't login.
SmackConfiguration.setPacketReplyTimeout(5000);
config = new ConnectionConfiguration("myserver.org", port, "localhost");
config.setSelfSignedCertificateEnabled(true);
config.setSecurityMode(ConnectionConfiguration.SecurityMode.enabled);
config.setSASLAuthenticationEnabled(true);
// config.setKeystorePath("keystore.jks");
// config.setTruststorePath("keystore.jks");
config.setKeystorePath("bogus_mina_tls.cert");
config.setTruststorePath("bogus_mina_tls.cert");
config.setTruststorePassword("boguspw");
XMPPConnection.DEBUG_ENABLED = true;
connection = new XMPPConnection(config);
try {
connection.connect();
} catch (XMPPException e) {
System.out.println("Error connect");
e.printStackTrace();
}
System.out.println("Connected: " + connection.isConnected());
try {
System.out.println(connection.isAuthenticated());
connection.login("user", "password");
} catch (XMPPException e) {
System.out.println("Error login");
e.printStackTrace();
}
I catch this exception:
SASL authentication PLAIN failed: incorrect-encoding: at
org.jivesoftware.smack.SASLAuthentication.authenticate(SASLAuthentication.java:337)
at
org.jivesoftware.smack.XMPPConnection.login(XMPPConnection.java:203)
at org.jivesoftware.smack.Connection.login(Connection.java:348) at
com.protocol7.vysper.intro.WorkingClient.init(WorkingClient.java:57)
at
com.protocol7.vysper.intro.WorkingClient.(WorkingClient.java:27)
at com.protocol7.vysper.intro.Runclient.main(Runclient.java:11)
I've seen these examples (1st, 2nd) but they don't work.

At first please note that the server certificate is not used for user authentication, it is used to provide secure communication channel between client and server.
From the log you can see that your authentication method is "SASL PLAIN", using a user and password.
On the server, you are setting username/password as:
accountManagement.addUser("user#myserver.org", "password");
but on the client you're using
connection.login("user", "password");
This doesn't fit with the error message you are posting, but I'd suggest you try again with correct user/password.