001    /****************************************************************
002     * Licensed to the Apache Software Foundation (ASF) under one   *
003     * or more contributor license agreements.  See the NOTICE file *
004     * distributed with this work for additional information        *
005     * regarding copyright ownership.  The ASF licenses this file   *
006     * to you under the Apache License, Version 2.0 (the            *
007     * "License"); you may not use this file except in compliance   *
008     * with the License.  You may obtain a copy of the License at   *
009     *                                                              *
010     *   http://www.apache.org/licenses/LICENSE-2.0                 *
011     *                                                              *
012     * Unless required by applicable law or agreed to in writing,   *
013     * software distributed under the License is distributed on an  *
014     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
015     * KIND, either express or implied.  See the License for the    *
016     * specific language governing permissions and limitations      *
017     * under the License.                                           *
018     ****************************************************************/
019    
020    
021    package org.apache.james.jspf.core;
022    
023    /**
024     * Interface which holds Constants for SPF
025     */
026    public interface SPF1Constants {
027    
028        /**
029         * Qualifier for PASS
030         */
031        public static final String PASS = "+";
032    
033        /**
034         * Qualifier for NEUTRAL
035         */
036        public static final String NEUTRAL = "?";
037    
038        /**
039         * Qualifier for FAIL
040         */
041        public static final String FAIL = "-";
042    
043        /**
044         * Qualifier for SOFTFAIL
045         */
046        public static final String SOFTFAIL = "~";
047    
048        /**
049         * The valid SPF_VERSION identifier
050         */
051        public static final String SPF_VERSION1 = "v=spf1";
052    
053    }