    001/*
    002 * Licensed to the Apache Software Foundation (ASF) under one or more
    003 * contributor license agreements.  See the NOTICE file distributed with
    004 * this work for additional information regarding copyright ownership.
    005 * The ASF licenses this file to You under the Apache License, Version 2.0
    006 * (the "License"); you may not use this file except in compliance with
    007 * the License.  You may obtain a copy of the License at
    008 *
    009 *      https://www.apache.org/licenses/LICENSE-2.0
    010 *
    011 * Unless required by applicable law or agreed to in writing, software
    012 * distributed under the License is distributed on an "AS IS" BASIS,
    013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014 * See the License for the specific language governing permissions and
    015 * limitations under the License.
    016 */
    017
    018package org.apache.commons.net.smtp;
    019
    020import java.io.IOException;
    021
    022/**
    023 * SMTPConnectionClosedException is used to indicate the premature or unexpected closing of an SMTP connection resulting from a
    024 * {@link org.apache.commons.net.smtp.SMTPReply#SERVICE_NOT_AVAILABLE SMTPReply.SERVICE_NOT_AVAILABLE} response (SMTP reply code 421) to a failed SMTP command.
    025 * This exception is derived from IOException and therefore may be caught either as an IOException or specifically as an SMTPConnectionClosedException.
    026 *
    027 *
    028 * @see SMTP
    029 * @see SMTPClient
    030 */
    031public final class SMTPConnectionClosedException extends IOException {
    032
    033    private static final long serialVersionUID = 626520434326660627L;
    034
    035    /** Constructs a SMTPConnectionClosedException with no message */
    036    public SMTPConnectionClosedException() {
    037    }
    038
    039    /**
    040     * Constructs a SMTPConnectionClosedException with a specified message.
    041     *
    042     * @param message The message explaining the reason for the exception.
    043     */
    044    public SMTPConnectionClosedException(final String message) {
    045        super(message);
    046    }
    047
    048}