Mail

import java.io.*; import java.net.*; import java.util.*; /** * * @author Administrator */ public class EmailAgent { /** * @param args the command line arguments */ public static void main(String[] args) throws Exception{ // TODO code application logic here // Establish a TCP connection with the mail server. System.out.println("Enter the mail server you wish to connect to (example: edge.nunet.nova.edu):\n"); String hostName = new String(); Scanner emailScanner = new Scanner(System.in); hostName = emailScanner.next(); Socket emailSocket = new Socket(hostName, 25); // Create a BufferedReader to read a line at a time. InputStream is = emailSocket.getInputStream(); InputStreamReader isr = new InputStreamReader(is); BufferedReader br = new BufferedReader(isr); // Read greeting from the server. String response = br.readLine(); System.out.println(response); if (!response.startsWith("220")) { throw new Exception("220 reply not received from server.\n"); } // Get a reference to the socket's output stream. OutputStream os = emailSocket.getOutputStream(); // Send HELO command and get server response. String command = "HELO pbrooks\r\n"; System.out.print(command); os.write(command.getBytes("US-ASCII")); response = br.readLine(); System.out.println(response); if (!response.startsWith("250")) { throw new Exception("250 reply not received from server.\n"); } // Send MAIL FROM command. System.out.println("Please enter your (source) e-mail address (example: [email protected]:\n"); String sourceAddress = emailScanner.next(); String mailFromCommand = "MAIL FROM: <" + sourceAddress + ">"; System.out.println(mailFromCommand); os.write(command.getBytes("US-ASCII")); response = br.readLine(); System.out.println(response); if (!response.startsWith("250")) throw new Exception("250 reply not received from server.\n"); // Send RCPT TO command. System.out.println("Please type the destination e-mail address (example: [email protected]):\n"); String destEmailAddress = new String();

destEmailAddress = emailScanner.next(); String fullAddress = new String(); fullAddress = "RCPT TO: <" + destEmailAddress + ">"; System.out.println(fullAddress); os.write(fullAddress.getBytes("US-ASCII")); response = br.readLine(); System.out.println(response); if(!response.startsWith("250")) { System.out.println("Nope"); throw new Exception("250 reply not received from server.\n");

}

// Send DATA command. String dataString = new String(); dataString = "DATA"; System.out.println(dataString); os.write(dataString.getBytes("US-ASCII")); response = br.readLine(); if(!response.startsWith("354")) throw new Exception("354 reply not received from server.\n"); System.out.println(response); // Send message data. System.out.println("Enter your message, enter '.' on a separate line to end message data entry:\n"); String input = new String(); while(input.charAt(0) != '.') { input = emailScanner.next(); os.write(input.getBytes("US-ASCII")); } //End with line with a single period. os.write(input.getBytes("US-ASCII")); response = br.readLine(); System.out.println(response); if(!response.startsWith("250")) throw new Exception("250 reply not received from server\n"); // Send QUIT command. String quitCommand = new String(); quitCommand = "QUIT"; os.write(command.getBytes("US-ASCII")); }

}