You can send email using a command line or a script
curl is an open source command line tool and library for transferring data with URL syntax
Request
curl -H "Content-Type: application/json" -v -X POST -d '{"name":"josdem","email":"joseluis.delacruz@gmail.com","message":"Hello from curl!", "template":"message.ftl","token":"userToken"}' 'https://jmailer.josdem.io/emailer/message'
Lightweight SOAP and REST webservice clients for Groovy
@Grab('com.github.groovy-wslite:groovy-wslite:1.1.2')
import wslite.rest.RESTClient
def client = new RESTClient("http://jmailer.josdem.io/emailer/")
client.post(path:'message'){
json name:"josdem",email:"joseluis.delacruz@gmail.com",message:"Hello from WSLite!",template:"message.ftl",token:"userToken"
}