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Import the required classes and interfaces.

import net.rim.blackberry.api.mail.Folder;
import net.rim.blackberry.api.mail.Message;
import net.rim.blackberry.api.mail.Session;
import net.rim.blackberry.api.mail.Store;
import net.rim.blackberry.api.mail.Transport;

Invoke Session.getTransport() and store the returned object in a variable of type Transport. The Transport object represents the messaging transport protocol.
```
Transport trans = Session.getTransport();
```
Invoke Session.waitForDefaultSession().getStore() to retrieve the Store object.
```
Store store = Session.waitForDefaultSession().getStore();
```
Invoke Store.list(INBOX) to retrieve all the folders in the INBOX folder. Store the folders in a Folder array.
```
Folder[] folders = store.list(INBOX);
```
Specify a specific array element to retrieve the inbox folder.
```
Folder inbox = folders[0];
```
Invoke Folder.getMessages() to retrieve the messages in the inbox folder. Store the messages in a Message array.
```
Message[] messages = inbox.getMessages();
```
Invoke Message.reply(Boolean) and specify true to reply to all message recipients or false to reply to only the sender.
```
if( messages.length > 0 ) 
{
   Message msg = messages[0];
}
Message reply = msg.reply(true);
```

Invoke Transport.send(Message) to send the reply.

try 
{
   trans.send(reply);
} 
catch(MessagingException e) 
{
   System.out.println(e.getMessage());
}

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