1 /*****************************************************************
2 * Licensed to the Apache Software Foundation (ASF) under one *
3 * or more contributor license agreements. See the NOTICE file *
4 * distributed with this work for additional information *
5 * regarding copyright ownership. The ASF licenses this file *
6 * to you under the Apache License, Version 2.0 (the *
7 * "License"); you may not use this file except in compliance *
8 * with the License. You may obtain a copy of the License at *
9 * *
10 * http://www.apache.org/licenses/LICENSE-2.0 *
11 * *
12 * Unless required by applicable law or agreed to in writing, *
13 * software distributed under the License is distributed on an *
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY *
15 * KIND, either express or implied. See the License for the *
16 * specific language governing permissions and limitations *
17 * under the License. *
18 ****************************************************************/
19
20 package org.apache.james.smtpserver;
21
22 import org.apache.james.util.mail.dsn.DSNStatus;
23
24 /***
25 * Handles EXPN command
26 */
27 public class ExpnCmdHandler implements CommandHandler {
28
29 /***
30 * The name of the command handled by the command handler
31 */
32 private final static String COMMAND_NAME = "EXPN";
33
34 /***
35 * Handler method called upon receipt of a EXPN command.
36 * This method informs the client that the command is
37 * not implemented.
38 *
39 * @see org.apache.james.smtpserver.CommandHandler#onCommand(SMTPSession)
40 */
41 public void onCommand(SMTPSession session) {
42 String responseString = "502 "+DSNStatus.getStatus(DSNStatus.PERMANENT,DSNStatus.SYSTEM_NOT_CAPABLE)+" EXPN is not supported";
43 session.writeResponse(responseString);
44 }
45
46 }