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  76
  77 <td colspan="3"> <h1> Postfix feature overview </h1> </td>
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  80
  81 <tr>
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  83 <td>
  84
  85 <h2> Supported environments </h2>
  86
  87 <p> Postfix runs on AIX, BSD, HP-UX, IRIX, LINUX, MacOS X, Solaris,
  88 Tru64 UNIX, and other UNIX systems. It requires ANSI C, a POSIX.1
  89 library, and BSD sockets. See below for the gory details of what
  90 Postfix expects from the file system. </p>
  91
  92 <p> Gory details: the Postfix mail queue requires that (1) the file
  93 system can rename a file to a near-by directory without changing
  94 the file's inode number, and that (2) mail is safely stored after
  95 fsync() of that file (not its parent directory) returns successfully,
  96 even when that file is renamed to a
  97 near-by directory at some later point in time. Maildir delivery
  98 also requires that (3) a file can be hard linked between different
  99 near-by directories.  Mailbox delivery introduces no additional
 100 requirements beyond what is already needed for Postfix queues.
 101 </p>
 102
 103 <h2> Main features </h2>
 104
 105 <p> The following is a list of major Postfix features.  Some features
 106 require third-party libraries (examples: LDAP, SQL, TLS).  Other
 107 features are available only when the necessary operating system
 108 support exists and Postfix knows how to use it (examples: IP version
 109 6, connection caching).  </p>
 110
 111 <h3> Protocol support </h3>
 112
 113 <table>
 114
 115 <tr> <td> Postfix 2.2 </td> <td> <a href="CONNECTION_CACHE_README.html">
 116 Connection cache for SMTP </a> </td> </tr>
 117
 118 <tr> <td> Postfix 2.3 </td> <td> <a href="MILTER_README.html">
 119 DKIM, DomainKeys and SenderID authentication (via Milter plug-in)
 120 </a> </td> </tr>
 121
 122 <tr> <td> Postfix 2.3 </td> <td> <a href="DSN_README.html"> DSN
 123 status notifications </a> </td> </tr>
 124
 125 <tr> <td> Postfix 2.3 </td> <td> Enhanced status codes </td> </tr>
 126
 127 <tr> <td> Postfix 1.0 </td> <td> <a href="ETRN_README.html"> ETRN
 128 on-demand relay </a> </td> </tr>
 129
 130 <tr> <td> Postfix 2.2 </td> <td> <a href="IPV6_README.html"> IP
 131 version 6 </a> </td> </tr>
 132
 133 <tr> <td> Postfix 1.0 </td> <td> <a href="lmtp.8.html">LMTP client</a>
 134 </td> </tr>
 135
 136 <tr> <td> Postfix 2.0 </td> <td> MIME (including 8BITMIME to 7BIT
 137 conversion) </td> </tr>
 138
 139 <tr> <td> Postfix 1.0 </td> <td> Pipelining (SMTP client and
 140 server)</td> </tr>
 141
 142 <tr> <td> Postfix 2.3 </td> <td> <a href="SASL_README.html"> Plug-in
 143 support for multiple SASL implementations (Cyrus, Dovecot) </a>
 144 </td> </tr>
 145
 146 <tr> <td> Postfix 1.0 </td> <td> <a href="SASL_README.html"> SASL
 147 authentication </a> </td> </tr>
 148
 149 <tr> <td> Postfix 2.2 </td> <td> <a href="TLS_README.html"> TLS
 150 encryption and authentication </a> </td> </tr>
 151
 152 <tr> <td> Postfix 1.1 </td> <td> <a href="qmqpd.8.html">QMQP
 153 server</a> </td> </tr>
 154
 155 </table>
 156
 157 <h3> By popular demand...</h3>
 158
 159 <table>
 160
 161 <tr> <td> Postfix 2.3 </td> <td> <a href="bounce.5.html">Configurable delivery status notification message text </a> </td> </tr>
 162
 163 <tr> <td> Postfix 2.3 </td> <td> <a
 164 href="postconf.5.html#sender_dependent_relayhost_maps">Sender-dependent
 165 SMTP relay lookup</a> </td> </tr>
 166
 167 <tr> <td> Postfix 2.3 </td> <td> <a
 168 href="postconf.5.html#smtp_sender_dependent_authentication">Sender-dependent
 169 SASL password lookup</a> </td> </tr>
 170
 171 </table>
 172
 173 <h3> Junk mail control</h3>
 174
 175 <table>
 176
 177 <tr> <td> Postfix 2.1 </td> <td> <a href="SMTPD_ACCESS_README.html">
 178 Access control per client/sender/recipient/etc. </a> </td> </tr>
 179
 180 <tr> <td> Postfix 2.1 </td> <td> <a
 181 href="ADDRESS_VERIFICATION_README.html"> Address probing callout
 182  </a> </td> </tr>
 183
 184 <tr> <td> Postfix 1.1 </td> <td> <a href="CONTENT_INSPECTION_README.html">
 185 Content filter (built-in, external before queue, external after
 186 queue) </a> </td> </tr>
 187
 188 <tr> <td> Postfix 2.3 </td> <td> <a href="MILTER_README.html">
 189 Sendmail Milter (mail filter) protocol </a> </td> </tr>
 190
 191 <tr> <td> Postfix 2.1 </td> <td> <a href="SMTPD_POLICY_README.html">Greylisting
 192 plug-in </a> </td> </tr>
 193
 194 <tr> <td> Postfix 2.1 </td> <td> <a href="SMTPD_POLICY_README.html">
 195 SPF plug-in </a> </td> </tr>
 196
 197 <tr> <td> Postfix 2.2 </td> <td> SMTP server per-client rate and
 198 concurrency limits </td> </tr>
 199
 200 <tr> <td> Postfix 2.5 </td> <td> <a href="STRESS_README.html">
 201 Stress-dependent configuration </a> </td> </tr>
 202
 203 </table>
 204
 205 <h3>Database support </h3>
 206
 207 <table>
 208
 209 <tr> <td> Postfix 1.0 </td> <td> <a href="DB_README.html"> Berkeley
 210 DB database </a> </td> </tr>
 211
 212 <tr> <td> Postfix 2.2 </td> <td> <a href="CDB_README.html"> CDB
 213 database </a> </td> </tr>
 214
 215 <tr> <td> Postfix 1.0 </td> <td> DBM database </td> </tr>
 216
 217 <tr> <td> Postfix 1.0 </td> <td> <a href="LDAP_README.html"> LDAP
 218 database </a></td> </tr>
 219
 220 <tr> <td> Postfix 1.0 </td> <td> <a href="MYSQL_README.html"> MySQL
 221 database </a> </td> </tr>
 222
 223 <tr> <td> Postfix 2.0 </td> <td> <a href="PGSQL_README.html">
 224 PostgreSQL database </a> </td> </tr>
 225
 226 <tr> <td> Postfix 2.8 </td> <td> <a href="SQLITE_README.html">
 227 SQLite database </a> </td> </tr>
 228
 229 </table>
 230
 231 <h3>Mailbox support </h3>
 232
 233 <table>
 234
 235 <tr> <td> Postfix 1.0 </td> <td> Maildir and mailbox format </td>
 236 </tr>
 237
 238 <tr> <td> Postfix 1.0 </td> <td> <a href="VIRTUAL_README.html">
 239 Virtual domains </a> </td> </tr>
 240
 241 </table>
 242
 243 <h3>Address manipulation </h3>
 244
 245 <table>
 246
 247 <tr> <td> Postfix 2.2 </td> <td> <a
 248 href="ADDRESS_REWRITING_README.html#generic"> Masquerading addresses
 249 in outbound SMTP mail </a> </td> </tr>
 250
 251 <tr> <td> Postfix 2.2 </td> <td> <a
 252 href="ADDRESS_REWRITING_README.html#william"> Selective address
 253 rewriting </a> </td> </tr>
 254
 255 <tr> <td> Postfix 1.1 </td> <td> <a href="VERP_README.html"> VERP
 256 envelope return addresses </a> </td> </tr>
 257
 258 </table>
 259
 260 </td>
 261
 262 </tr>
 263
 264 </table>
 265
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