http://forums.hotjoe.com/posts/list/3.page JForum - http://www.jforum.net
I am experiencing problems when trying to send emails using the smtp. I am using the code below but am getting the following errors:

[b]220 hawk.dcu.ie ESMTP Service ready
HELO localhost.localdomain
250 hawk.dcu.ie
MAIL FROM: adam.keaney2@mail.dcu.ie
501 Syntax error in parameters or arguments to MAIL command
RCPT to: adam.keaney2@mail.dcu.ie
501 Syntax error in parameters or arguments to RCPT command
DATA
503 DATA command outside of MAIL transaction
Subject: Test Email
Content-type: text/html; charset="us-ascii"
<b>You got mail!</b>
.
500 Subj command unrecognized[/b]

[code]import java.io.*;
import java.net.Socket;

/**
* Simple SMTP Client that allows your Java App send emails.
* Uses Java Sockets to connect directly to an SMTP server.
* It supports sending of plain text or HTML emails.
* Bonus: Unlike many other Java SMTP Sockets examples, this one actually works.
*
* @author Olly Oechsle, www.intelligent-web.co.uk
*/
public class Emailer {

public static void main(String[] args) throws Exception {
String results = send("mail.dcu.ie",
25,
"adam.keaney2@mail.dcu.ie",
"adam.keaney2@mail.dcu.ie",
"Test Email",
"<b>You got mail!</b>");
System.out.println(results);
}

/**
* Sends an email.
*
* @return The full SMTP conversation as a string.
*/
public static String send(
String host,
int port,
String to,
String from,
String subject,
String message) throws Exception {

// Save the SMTP conversation into this buffer (for debugging if necessary)
StringBuffer buffer = new StringBuffer();

try {

// Connect to the SMTP server running on the local machine. Usually this is SendMail
Socket smtpSocket = new Socket(host, port);

// We send commands TO the server with this
DataOutputStream output = new DataOutputStream(smtpSocket.getOutputStream());

// And recieve responses FROM the server with this
BufferedReader input =
new BufferedReader(
new InputStreamReader(
new DataInputStream(smtpSocket.getInputStream())));

try {

// Read the server's hello message
read(input, buffer);

// Say hello to the server
send(output, "HELO localhost.localdomain\r\n", buffer);
read(input, buffer);

// Who is sending the email
send(output, "MAIL FROM: " + from + "\r\n", buffer);
read(input, buffer);

// Where the mail is going
send(output, "RCPT to: " + to + "\r\n", buffer);
read(input, buffer);

// Start the message
send(output, "DATA\r\n", buffer);
read(input, buffer);

// Set the subject
send(output, "Subject: " + subject + "\r\n", buffer);

// If we detect HTML in the message, set the content type so it displays
// properly in the recipient's email client.
if (message.indexOf("<") == -1) {
send(output, "Content-type: text/plain; charset=\"us-ascii\"\r\n", buffer);
} else {
send(output, "Content-type: text/html; charset=\"us-ascii\"\r\n", buffer);
}

// Send the message
send(output, message, buffer);

// Finish the message
send(output, "\r\n.\r\n", buffer);
read(input, buffer);

// Close the socket
smtpSocket.close();

}
catch (IOException e) {
System.out.println("Cannot send email as an error occurred.");
}
}
catch (Exception e) {
System.out.println("Host unknown");
}

return buffer.toString();

}

/**
* Sends a message to the server using the DataOutputStream's writeBytes() method.
* Saves what was sent to the buffer so we can record the conversation.
*/
private static void send(DataOutputStream output,
String data,
StringBuffer buffer)
throws IOException {
output.writeBytes(data);
buffer.append(data);
}

/**
* Reads a line from the server and adds it onto the conversation buffer.
*/
private static void read(BufferedReader br, StringBuffer buffer) throws IOException {
int c;
while ((c = br.read()) != -1) {
buffer.append((char) c);
if (c == '\n') {
break;
}
}
}

}
[/code]]]> http://forums.hotjoe.com/posts/preList/705/2635.page http://forums.hotjoe.com/posts/preList/705/2635.page GMT
The [url=http://java.sun.com/products/javamail/]JavaMail API[/url] is very powerful and can handle much of this for you. Unless this is a school project, I'd strongly encourage you to use existing libraries rather than roll your own.]]> http://forums.hotjoe.com/posts/preList/705/2636.page http://forums.hotjoe.com/posts/preList/705/2636.page GMT http://forums.hotjoe.com/posts/preList/705/2638.page http://forums.hotjoe.com/posts/preList/705/2638.page GMT