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diff --git a/org/apache/commons/net/smtp/SMTPCommand.java b/org/apache/commons/net/smtp/SMTPCommand.java
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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.commons.net.smtp;
+
+/***
+ * SMTPCommand stores a set of constants for SMTP command codes.  To interpret
+ * the meaning of the codes, familiarity with RFC 821 is assumed.
+ * The mnemonic constant names are transcriptions from the code descriptions
+ * of RFC 821.  For those who think in terms of the actual SMTP commands,
+ * a set of constants such as {@link #HELO  HELO } are provided
+ * where the constant name is the same as the SMTP command.
+ * <p>
+ * <p>
+ * @author Daniel F. Savarese
+ ***/
+
+public final class SMTPCommand
+{
+
+
+    public static final int HELO = 0;
+    public static final int MAIL = 1;
+    public static final int RCPT = 2;
+    public static final int DATA = 3;
+    public static final int SEND = 4;
+    public static final int SOML = 5;
+    public static final int SAML = 6;
+    public static final int RSET = 7;
+    public static final int VRFY = 8;
+    public static final int EXPN = 9;
+    public static final int HELP = 10;
+    public static final int NOOP = 11;
+    public static final int TURN = 12;
+    public static final int QUIT = 13;
+
+    public static final int HELLO = HELO;
+    public static final int LOGIN = HELO;
+    public static final int MAIL_FROM = MAIL;
+    public static final int RECIPIENT = RCPT;
+    public static final int SEND_MESSAGE_DATA = DATA;
+    public static final int SEND_FROM = SEND;
+    public static final int SEND_OR_MAIL_FROM = SOML;
+    public static final int SEND_AND_MAIL_FROM = SAML;
+    public static final int RESET = RSET;
+    public static final int VERIFY = VRFY;
+    public static final int EXPAND = EXPN;
+    // public static final int HELP = HELP;
+    // public static final int NOOP = NOOP;
+    // public static final int TURN = TURN;
+    // public static final int QUIT = QUIT;
+    public static final int LOGOUT = QUIT;
+
+    // Cannot be instantiated
+    private SMTPCommand()
+    {}
+
+    static final String[] _commands = {
+                                          "HELO", "MAIL FROM:", "RCPT TO:", "DATA", "SEND FROM:", "SOML FROM:",
+                                          "SAML FROM:", "RSET", "VRFY", "EXPN", "HELP", "NOOP", "TURN", "QUIT"
+                                      };
+
+
+    /***
+     * Retrieve the SMTP protocol command string corresponding to a specified
+     * command code.
+     * <p>
+     * @param command The command code.
+     * @return The SMTP protcol command string corresponding to a specified
+     *         command code.
+     ***/
+    public static final String getCommand(int command)
+    {
+        return _commands[command];
+    }
+
+}