Send Email from AWS SES using Smtp

main.scala

// make sure the receiver emails are verified:
// https://console.aws.amazon.com/ses/home?region=us-east-1#verified-senders-email:

import javax.activation.DataHandler
import javax.activation.DataSource
import javax.activation.FileDataSource
import javax.mail.Session
import javax.mail.Message
import javax.mail.MessagingException
import javax.mail.internet.AddressException
import javax.mail.internet.InternetAddress
import javax.mail.internet.MimeBodyPart
import javax.mail.internet.MimeMessage
import javax.mail.internet.MimeMultipart
import javax.mail.internet.MimeUtility
import java.util.Properties

def sendAWSSESEmail(toEmails: Vector[String], fromEmail: String, subject: String, body: String): Unit = {
    // get credentials from here: https://console.aws.amazon.com/ses/home?region=us-east-1#smtp-settings:
    val smtpUsername = "xxx"
    val smtpPassword = "xxx"
    val hostName = "email-smtp.us-east-1.amazonaws.com"
    val port = "25"
    val properties = new Properties
    val session = Session.getDefaultInstance(properties)

    try {
      val messageBody = body
      val message = new MimeMessage(session)
      message.setFrom(new InternetAddress(fromEmail))
      for (toEmail <- toEmails) {
        message.addRecipient(Message.RecipientType.TO, new InternetAddress(toEmail))
      }
      message.setSubject(subject)
      message.setHeader("Content-Type", "text/plain;")
      message.setContent(messageBody, "text/plain")
      val transport = session.getTransport("smtp")
      transport.connect(hostName, smtpUsername, smtpPassword)
      transport.sendMessage(message, message.getAllRecipients)
    } catch {
      case exception: Exception =>
        println("Mail delivery failed. " + exception)
    }
}