Mailgun Example with Jersey 2.x

SendMail.java

/*I have tried this with Jersey 2.14 only but should work for Jersey 2.x*/

package com.mail;

import javax.ws.rs.client.Client;
import javax.ws.rs.client.ClientBuilder;
import javax.ws.rs.client.Entity;
import javax.ws.rs.client.WebTarget;
import javax.ws.rs.core.Form;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import org.glassfish.jersey.client.ClientConfig;
import org.glassfish.jersey.client.authentication.HttpAuthenticationFeature;

/**
 *
 * @author chhabra.romit@gmail.com
 */
public class SendMail {
    public static void main(String[] args) {
        ClientConfig clientConfigMail = new ClientConfig();
        Client clientMail = ClientBuilder.newClient(clientConfigMail);
        clientMail.register(HttpAuthenticationFeature.basic("api",<your-api-key>));
        WebTarget targetMail = clientMail.target("https://api.mailgun.net/v2/"+<your-mailgun-subdomain>+"/messages");
        Form formData = new Form();
        formData.param("from", "Mailgun Sandbox <postmaster@"+<your-mailgun-subdomain>+">");
        formData.param("to", <to-email-address>);
        formData.param("subject", <subject>);
        formData.param("text", <text>);
        Response response = targetMail.request().post(Entity.entity(formData,MediaType.APPLICATION_FORM_URLENCODED_TYPE));
        //If everything goes correct you should be able to see status 200 in response
        System.out.println("Mail sent : " + response);
    }
}

👍 Thanks

First time go!