use postmark::api::email::SendEmailRequest;
use postmark::api::Body;
use postmark::reqwest::PostmarkClient;
use postmark::Query;

async fn send_email(){
  let client = PostmarkClient::builder()
   .server_token("<sometoken>")
   .build();

  let req = SendEmailRequest::builder()
    .from("me@example.com")
    .to("you@example.com")
    .body(Body::text("it's me, Mario!".to_string()))
    .build();
  let resp = req.execute(&client).await;
}