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006 * to you under the Apache License, Version 2.0 (the *
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015 * KIND, either express or implied. See the License for the *
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019
020
021 package org.apache.mailet.base;
022
023 /**
024 * This utility class provides the set of header names explicitly defined in RFC 2822
025 *
026 */
027 public class RFC2822Headers {
028
029 // See Section 3.6.1 of RFC 2822
030
031 /**
032 * The name of the RFC 2822 header that stores the mail date.
033 */
034 public final static String DATE = "Date";
035
036 // See Section 3.6.2 of RFC 2822
037
038 /**
039 * The name of the RFC 2822 header that stores the mail author(s).
040 */
041 public final static String FROM = "From";
042
043 /**
044 * The name of the RFC 2822 header that stores the actual mail transmission agent,
045 * if this differs from the author of the message.
046 */
047 public final static String SENDER = "Sender";
048
049 /**
050 * The name of the RFC 2822 header that stores the reply-to address.
051 */
052 public final static String REPLY_TO = "Reply-To";
053
054 // See Section 3.6.3 of RFC 2822
055
056 /**
057 * The name of the RFC 2822 header that stores the primary mail recipients.
058 */
059 public final static String TO = "To";
060
061 /**
062 * The name of the RFC 2822 header that stores the carbon copied mail recipients.
063 */
064 public final static String CC = "Cc";
065
066 /**
067 * The name of the RFC 2822 header that stores the blind carbon copied mail recipients.
068 */
069 public final static String BCC = "Bcc";
070
071 // See Section 3.6.4 of RFC 2822
072
073 /**
074 * The name of the RFC 2822 header that stores the message id.
075 */
076 public final static String MESSAGE_ID = "Message-ID";
077
078 /**
079 * A common variation on the name of the RFC 2822 header that
080 * stores the message id. This is needed for certain filters and
081 * processing of incoming mail.
082 */
083 public final static String MESSAGE_ID_VARIATION = "Message-Id";
084
085 /**
086 * The name of the RFC 2822 header that stores the message id of the message
087 * that to which this email is a reply.
088 */
089 public final static String IN_REPLY_TO = "In-Reply-To";
090
091 /**
092 * The name of the RFC 2822 header that is used to identify the thread to
093 * which this message refers.
094 */
095 public final static String REFERENCES = "References";
096
097 // See Section 3.6.5 of RFC 2822
098
099 /**
100 * The name of the RFC 2822 header that stores the subject.
101 */
102 public final static String SUBJECT = "Subject";
103
104 /**
105 * The name of the RFC 2822 header that stores human-readable comments.
106 */
107 public final static String COMMENTS = "Comments";
108
109 /**
110 * The name of the RFC 2822 header that stores human-readable keywords.
111 */
112 public final static String KEYWORDS = "Keywords";
113
114 // See Section 3.6.6 of RFC 2822
115
116 /**
117 * The name of the RFC 2822 header that stores the date the message was resent.
118 */
119 public final static String RESENT_DATE = "Resent-Date";
120
121 /**
122 * The name of the RFC 2822 header that stores the originator of the resent message.
123 */
124 public final static String RESENT_FROM = "Resent-From";
125
126 /**
127 * The name of the RFC 2822 header that stores the transmission agent
128 * of the resent message.
129 */
130 public final static String RESENT_SENDER = "Resent-Sender";
131
132 /**
133 * The name of the RFC 2822 header that stores the recipients
134 * of the resent message.
135 */
136 public final static String RESENT_TO = "Resent-To";
137
138 /**
139 * The name of the RFC 2822 header that stores the carbon copied recipients
140 * of the resent message.
141 */
142 public final static String RESENT_CC = "Resent-Cc";
143
144 /**
145 * The name of the RFC 2822 header that stores the blind carbon copied recipients
146 * of the resent message.
147 */
148 public final static String RESENT_BCC = "Resent-Bcc";
149
150 /**
151 * The name of the RFC 2822 header that stores the message id
152 * of the resent message.
153 */
154 public final static String RESENT_MESSAGE_ID = "Resent-Message-ID";
155
156 // See Section 3.6.7 of RFC 2822
157
158 /**
159 * The name of the RFC 2822 headers that store the tracing data for the return path.
160 */
161 public final static String RETURN_PATH = "Return-Path";
162
163 /**
164 * The name of the RFC 2822 headers that store additional tracing data.
165 */
166 public final static String RECEIVED = "Received";
167
168 // MIME headers
169
170 /**
171 * The name of the MIME header that stores the content type.
172 */
173 public final static String CONTENT_TYPE = "Content-Type";
174
175 /**
176 * Private constructor to prevent instantiation
177 */
178 private RFC2822Headers() {}
179
180 }