public static Result mailing(Proposal.Status status) {
JsonNode body = request().body().asJson();
String subjet = body.get("subject").asText();
String mailMarkdown = body.get("mail").asText();
PegDownProcessor pegDownProcessor = new PegDownProcessor();
String mailHtml = pegDownProcessor.markdownToHtml(mailMarkdown);
Set<String> mailsOfSpeakers = new HashSet<String>();
for (Proposal proposal : Proposal.findByStatus(status,getEvent())) {
if (proposal.getSpeaker() != null && proposal.getSpeaker().email != null) {