Google App engine provides an email service to send email. Unfortunately it is limited to 100 emails per day. So we uses mailgun to send an email.
Let me share the code that we used in our Java project to send an email using mailgun.
public static final String MAILGUN_API_KEY = "YOUR_MAILGUN_API_KEY";
public static final String MAILGUN_HOST = "example.com"; // your host name
public static void sendMail(String to, Set<String> cc, String subject,
String html) {
Client client = Client.create();
client.addFilter(new HTTPBasicAuthFilter("api", MAILGUN_API_KEY));
WebResource webResource = client.resource("https://api.mailgun.net/v2/"
+ MAILGUN_HOST + "/messages");
MultivaluedMapImpl formData = new MultivaluedMapImpl();
formData.add("from", "Example <hello@example.com>"); // your host email address
formData.add("to", to);
formData.add("subject", subject);
formData.add("html", html);
ClientResponse clientResponse = webResource.type(
MediaType.APPLICATION_FORM_URLENCODED).post(
ClientResponse.class, formData);
int status = clientResponse.getStatus();
if (status >= 400) {
System.out.println(clientResponse.getEntity(String.class));
}
}
Have a nice day.
