Send email from Jenkins job using Groovy Postbuild action

Question

Is there a way to send an email from Jenkins job using Groovy Postbuild action? Similar to how it can be done using Jenkins pipeline plugin

 mail to: 'devops@acme.com',
     subject: "Job '${env.JOB_NAME}' (${env.BUILD_NUMBER}) is waiting for input",
     body: "Please go to ${env.BUILD_URL}."

Answer 1

Thanks to https://stackoverflow.com/a/37194996/4624905 I figured out that I can use JavaMail API directly. It helped me.

import javax.mail.*
import javax.mail.internet.*


def sendMail(host, sender, receivers, subject, text) {
    Properties props = System.getProperties()
    props.put("mail.smtp.host", host)
    Session session = Session.getDefaultInstance(props, null)

    MimeMessage message = new MimeMessage(session)
    message.setFrom(new InternetAddress(sender))
    receivers.split(',').each {
        message.addRecipient(Message.RecipientType.TO, new InternetAddress(it))
    }
    message.setSubject(subject)
    message.setText(text)

    println 'Sending mail to ' + receivers + '.'
    Transport.send(message)
    println 'Mail sent.'
}
Usage Example:

sendMail('mailhost', messageSender, messageReceivers, messageSubject, messageAllText)