Sending mail in java using sendmail programme of lynix

Question

Hi,
How can I send mail using Java and lynux "sendmail" programme located at i.e sendmail: /usr/sbin/sendmail.
I don't want to use JavaMail API for sending. I want to use sendmail of lynix server. Plz help me. It's very uregent.
Regards,
Devom

Answer 1

Hey Guys, here is the workaround for sending mails in java through javamail program of linux/unix:
step 1 - Create a shell script which sends the mail using the 'sendmail' program. I have written below code in my shell script:
#!/bin/sh
#script to send simple email
# email subject
SUBJECT="Test Subject"
# Email To ?
EMAIL="[email protected],[email protected]"
# Email text/message. This file will be automatically created and all text will be appended in it.
EMAILMESSAGE="/tmp/emailmessage.txt"
echo "This is a sample mai text."> $EMAILMESSAGE
echo "And this is a also." >>$EMAILMESSAGE
echo " " >>$EMAILMESSAGE
echo " " >>$EMAILMESSAGE
echo "Thanks & Regards," >>$EMAILMESSAGE
echo "--Your Name" >>$EMAILMESSAGE
mail -s "$SUBJECT" "$EMAIL" < $EMAILMESSAGE
So create this script and save it as 'sendmail.sh' name in the same directory where you are executing your main java class. Please also note that this file should have full executable permissions for the program which is using this file.
Step 2- Here is my Java code that executed this shell script:
public void sendEmail()
String operatingSystemProp = "os.name";
String operatingSystemName = System.getProperty(operatingSystemProp);
if(!operatingSystemName.startsWith("Windows"))
String cmd = "./sendmail.sh";//unix shell script
try
     Runtime.getRuntime().exec(cmd);
}catch (Exception e)
     e.printStackTrace();
You just need to call this method in your java code. This method will actually pick that shell script in runtime and will execute it, the rest will be handled by the shell script itself.
So this workaround works fine for me and now I am sending mails through my java program using sendmail.
Cheers!