How to Send Mail From Camunda to the SMTP Server

package com.example.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;


@SpringBootApplication
public class MailApplication {
	
	public static void main(String args[]) {
		SpringApplication.run(MailApplication.class, args);
	}

}

package com.example.demo;

import java.util.Properties;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

import org.camunda.bpm.engine.delegate.DelegateExecution;
import org.camunda.bpm.engine.delegate.JavaDelegate;

public class Email implements JavaDelegate{
	
		public void execute (DelegateExecution execution) throws Exception{
			
				String email= (String) execution.getVariable("email");
				System.out.println("Email preparation to "+email);
				
				 Properties props = new Properties();
	                props.setProperty("mail.transport.protocol", "smtp");
	                props.setProperty("mail.smtp.host", "smtp.alj.intraxa");
	                props.put("mail.smtp.auth", "true");
	                props.put("mail.smtp.port", "TCP 25");
	                props.put("mail.smtp.starttls.enable", "true");
	                
				String myAccountEmail="[email protected]";
				String password="";
				
				Session session=Session.getInstance(props, new Authenticator() {
					@Override
					protected PasswordAuthentication getPasswordAuthentication() {
						return new PasswordAuthentication(myAccountEmail,password);
					}
				});
				
				Message message= prepareMessage (session, myAccountEmail, email);
				
				
				try {
					Transport.send(message);
					System.out.println("Message sent successfully");
				} catch (MessagingException e) {
					
					e.printStackTrace();
					System.out.println("Message was not send");
				}
				
				
		}

		private static Message prepareMessage(Session session, String myAccountEmail, String recipient) {
			try {
				Message message=new MimeMessage(session);
				message.setFrom(new InternetAddress(myAccountEmail));
				message.setRecipient(Message.RecipientType.TO, new InternetAddress (recipient));
				message.setSubject("Confirmation");
				message.setText("Welcome to Camunda");
				return message;
				
			} catch (Exception ex) {
				Logger.getLogger(Email.class.getName()).log(Level.SEVERE,null, ex);
			}
			return null;
		}
	}

application.yaml

		camunda.bpm:
  admin-user:
    id: n
    password: demo   
    firstName: demo
  filter:
    create: All tasks

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>CamundaEmailDemo</groupId>
  <artifactId>CamundaEmailDemo</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  
  <properties>
    <camunda.spring-boot.version>7.16.0</camunda.spring-boot.version>
    <spring-boot.version>2.5.4</spring-boot.version>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
  </properties>
  
   <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-dependencies</artifactId>
        <version>${spring-boot.version}</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>
    </dependencies>
  </dependencyManagement>
  
  <dependencies>
    <dependency>
      <groupId>org.camunda.bpm.springboot</groupId>
      <artifactId>camunda-bpm-spring-boot-starter-webapp</artifactId>
      <version>${camunda.spring-boot.version}</version>
    </dependency>
    <!--        //for accessing camunda api's-->
        <!--        //for connectors-->
        <dependency>
            <groupId>org.camunda.bpm.springboot</groupId>
            <artifactId>camunda-bpm-spring-boot-starter-rest</artifactId>
            <version>${camunda.spring-boot.version}</version>
        </dependency>

        <dependency>
            <groupId>org.camunda.connect</groupId>
            <artifactId>camunda-connect-http-client</artifactId>
            <version>1.3.0</version>
        </dependency>
        <dependency>
            <groupId>org.camunda.connect</groupId>
            <artifactId>camunda-connect-soap-http-client</artifactId>
            <version>1.3.0</version>
        </dependency>
        <dependency>
            <groupId>org.camunda.bpm</groupId>
            <artifactId>camunda-engine-plugin-connect</artifactId>
            <version>7.16.0</version>
        </dependency>
    
    <dependency>
      <groupId>com.h2database</groupId>
      <artifactId>h2</artifactId>
    </dependency>
    <dependency>
      <groupId>com.sun.xml.bind</groupId>
      <artifactId>jaxb-impl</artifactId>
      <version>2.3.5</version>
    </dependency>
    <!--for email-->
        <dependency>
            <groupId>org.camunda.bpm.extension</groupId>
            <artifactId>camunda-bpm-mail-core</artifactId>
            <version>1.2.0</version>
        </dependency>
        <dependency>
    <groupId>com.sun.mail</groupId>
    <artifactId>javax.mail</artifactId>
    <version>1.4.5</version>
</dependency>
  </dependencies>
  
   <build>
    <plugins>
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
        <version>${spring-boot.version}</version>
        <configuration>
          <layout>ZIP</layout>
        </configuration>
        <executions>
          <execution>
            <goals>
              <goal>repackage</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>
  
</project>