/*
 *  Copyright (c) 2011-2015 The original author or authors
 *
 *  All rights reserved. This program and the accompanying materials
 *  are made available under the terms of the Eclipse Public License v1.0
 *  and Apache License v2.0 which accompanies this distribution.
 *
 *       The Eclipse Public License is available at
 *       http://www.eclipse.org/legal/epl-v10.html
 *
 *       The Apache License v2.0 is available at
 *       http://www.opensource.org/licenses/apache2.0.php
 *
 *  You may elect to redistribute this code under either of these licenses.
 */

package io.vertx.ext.mail;

possible options for a secure connection using TLS


either DISABLED, OPTIONAL or REQUIRED

DISABLED means STARTTLS will not be used in any case

OPTIONS means STARTTLS will be used if the server supports it and a plain connection will be used otherwise
please note that this option is not a secure as it seems since a MITM attacker can remove the STARTTLS line
from the capabilities reply.

REQUIRED means that STARTTLS will be used if the server supports it and the send operation will fail otherwise
Author:
Alexander Lehmann/**
 * possible options for a secure connection using TLS
 * <br>
 * either DISABLED, OPTIONAL or REQUIRED
 * <p>
 * DISABLED means STARTTLS will not be used in any case
 * <p>
 * OPTIONS means STARTTLS will be used if the server supports it and a plain connection will be used otherwise
 * please note that this option is not a secure as it seems since a MITM attacker can remove the STARTTLS line
 * from the capabilities reply.
 * <p>
 * REQUIRED means that STARTTLS will be used if the server supports it and the send operation will fail otherwise
 *
 * @author <a href="http://oss.lehmann.cx/">Alexander Lehmann</a>
 */
public enum StartTLSOptions {
  DISABLED,
  OPTIONAL,
  REQUIRED
}