Java code to send mail in Lotus Notes Client without using Lotus Notes Applications

import lotus.domino.NotesException;

/**
* Send an email message using the Domino mail server. Can be used in non-Domino Java applications, and can also be run from the command line.
*/
public class DominoMailbox
{

/**
* One person or group name. For example, Brian Green/Acme@AcmeMAIL. Group names must appear in the Domino
* sever's address book.
*/
public String sendTo;

/**
* One person or group name. For example, Brian Green/Acme@AcmeMAIL. Group names must appear in the Domino
* sever's address book.
*/
public String copyTo;

/**
* The email's subject line.
*/
public String subject;

/**
* The email's message text.
*/
public String message;

/**
* Host name of the Domino server. A connection will be opened to this server.
*/
private String dominoServer = "server name";

/**
* Mailbox available to the dominoUsername.
*/
private String dominoMailbox = "mail\\user.nsf";

/**
* Username of the Domino user. Must be allowed to access the target database (dominoMailbox), and must be allowed
* to open DIIOP connections to the dominoServer. (The DIIOP task must be running on the Domino server.)
*/
private String dominoUsername = "username in domino";

/**
* Internet password for the dominoUsername. Defined in the Domino server's address book.
*/
private String dominoPassword = "password";


/**
* Constructs a new email message. Call the "send" method when you're ready to send it.
* @param sendTo
* @param copyTo
* @param subject
* @param message
*/
public DominoMailbox( String sendTo, String copyTo, String subject, String message )
{
this.sendTo = sendTo;
this.copyTo = copyTo;
this.subject = subject;
this.message = message;
}

/**
* Optional startup - Send a message from the command line.
* @param args To run from the command line, specify 4 parameters.
* [1] SendTo. One person or group name. For example, Brian Green/Acme@AcmeMAIL"
* [2] CopyTo. One person or group name.
* [3] Subject.
* [4] Message.
*/
public static void main( String[] args )
{
if ( args.length != 4 )
{
System.out.println( "\n\n" +
"To start from the command line, you must supply these arguments: \n" +
"[1] SendTo. One person or group name. For example, Brian Green/Acme@AcmeMAIL \n" +
"[2] CopyTo. One person or group name. \n" +
"[3] Subject. \n" +
"[4] Message. \n\n" );
}
else
{
DominoMailbox mail = new DominoMailbox( args[0], args[1], args[2], args[3] );
mail.send();
}
}

/**
* Connects to the Domino application server, and sends an email.
*/
public void send()
{
try
{
lotus.domino.Session dominoSession = lotus.domino.NotesFactory.createSession( dominoServer, dominoUsername, dominoPassword );
lotus.domino.Database dominoDb = dominoSession.getDatabase( dominoServer, dominoMailbox );
//System.out.println( "Connected as: " + dominoSession.getUserName() );

lotus.domino.Document memo = dominoDb.createDocument();
memo.appendItemValue( "Form", "Memo" );
memo.appendItemValue( "Importance", "1" );
memo.appendItemValue( "CopyTo", copyTo );
memo.appendItemValue( "Subject", subject );
memo.appendItemValue( "Body", message );
memo.send( false, sendTo );

//Recycle
dominoDb.recycle();
dominoSession.recycle();
}
catch ( NotesException e )
{
System.out.println( "Error - " + e.id + " " + e.text );
//e.printStackTrace( System.out );
}
catch ( Exception e )
{
System.out.println( "Error - " + e.toString() );
//e.printStackTrace( System.out );
}

}


}

  The above code works only when DIIOP is enabled in Domino server. Ask your domino admin to enable the task and the code works perfectly. Also use notes.jar file while compiling the java code. Refer how to compile a java code along with a jar file.