Exception in thread "main" javax.mail.NoSuchProviderException: invalid prov

Question

HI,
I am trying to read mails from my inbox i amgetting the ErrorC:\javamail>java
Readmail
Exception in thread "main" javax.mail.NoSuchProviderException: No provider for IMAP
        at javax.mail.Session.getProvider(Session.java:455)
        at javax.mail.Session.getStore(Session.java:530)
        at javax.mail.Session.getStore(Session.java:510)
        at Readmail.main(Readmail.java:24)My Code is    {
String host = "hostname";
String username = "user";
String password = "password";
// Create empty properties
Properties props = new Properties();
// Get session
Session session = Session.getDefaultInstance(props,null);
// Get the store
Store store = session.getStore("IMAP");
store.connect(host, username, password);
// Get folder
Folder folder = store.getFolder("Inbox");
folder.open(Folder.READ_ONLY);
// Get directory
Message message[] = folder.getMessages();
for (int i=0, n=message.length; i<n; i++)
   System.out.println(i + ": " + message.getFrom()[0]
+ "\t" + message[i].getSubject());
// Close connection
folder.close(false);
store.close();
I have also tried POP3 and MIME and SMTP
Can anyone help me Thanks

Answer 1

hi bshannon,
I am getting the same error for others but for pop3 the error is as below
Exception in thread "main" javax.mail.MessagingException: Connect failed;
  nested exception is:
        java.net.ConnectException: Connection refused: connect
        at com.sun.mail.pop3.POP3Store.protocolConnect(POP3Store.java:148)
        at javax.mail.Service.connect(Service.java:275)
        at javax.mail.Service.connect(Service.java:156)
        at Readmail.main(Readmail.java:25)
Caused by: java.net.ConnectException: Connection refused: connect
        at java.net.PlainSocketImpl.socketConnect(Native Method)
        at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:305)
        at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:171)
        at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:158)
        at java.net.Socket.connect(Socket.java:452)
        at java.net.Socket.connect(Socket.java:402)
        at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:232)
        at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:189)
        at com.sun.mail.pop3.Protocol.<init>(Protocol.java:81)
        at com.sun.mail.pop3.POP3Store.getPort(POP3Store.java:201)
        at com.sun.mail.pop3.POP3Store.protocolConnect(POP3Store.java:144)
        ... 3 more