doc/doc-txt/NewStuff

   1 $Cambridge: exim/doc/doc-txt/NewStuff,v 1.147 2007/06/14 13:27:11 ph10 Exp $
   2
   3 New Features in Exim
   4 --------------------
   5
   6 This file contains descriptions of new features that have been added to Exim.
   7 Before a formal release, there may be quite a lot of detail so that people can
   8 test from the snapshots or the CVS before the documentation is updated. Once
   9 the documentation is updated, this file is reduced to a short list.
  10
  11 Version 4.68
  12 ------------
  13
  14  1. The body_linecount and body_zerocount C variables are now exported in the
  15     local_scan API.
  16
  17
  18 Version 4.67
  19 ------------
  20
  21  1. There is a new log selector called smtp_no_mail, which is not included in
  22     the default setting. When it is set, a line is written to the main log
  23     whenever an accepted SMTP connection terminates without having issued a
  24     MAIL command.
  25
  26  2. When an item in a dnslists list is followed by = and & and a list of IP
  27     addresses, the behaviour was not clear when the lookup returned more than
  28     one IP address. This has been solved by the addition of == and =& for "all"
  29     rather than the defaule "any" matching.
  30
  31  3. Up till now, the only control over which cipher suites GnuTLS uses has been
  32     for the cipher algorithms. New options have been added to allow some of the
  33     other parameters to be varied.
  34
  35  4. There is a new compile-time option called ENABLE_DISABLE_FSYNC. When it is
  36     set, Exim compiles a runtime option called disable_fsync.
  37
  38  5. There is a new variable called $smtp_count_at_connection_start.
  39
  40  6. There's a new control called no_pipelining.
  41
  42  7. There are two new variables called $sending_ip_address and $sending_port.
  43     These are set whenever an SMTP connection to another host has been set up.
  44
  45  8. The expansion of the helo_data option in the smtp transport now happens
  46     after the connection to the server has been made.
  47
  48  9. There is a new expansion operator ${rfc2047d: that decodes strings that
  49     are encoded as per RFC 2047.
  50
  51 10. There is a new log selector called "pid", which causes the current process
  52     id to be added to every log line, in square brackets, immediately after the
  53     time and date.
  54
  55 11. Exim has been modified so that it flushes SMTP output before implementing
  56     a delay in an ACL. It also flushes the output before performing a callout,
  57     as this can take a substantial time. These behaviours can be disabled by
  58     obeying control = no_delay_flush or control = no_callout_flush,
  59     respectively, at some earlier stage of the connection.
  60
  61 12. There are two new expansion conditions that iterate over a list. They are
  62     called forany and forall.
  63
  64 13. There's a new global option called dsn_from that can be used to vary the
  65     contents of From: lines in bounces and other automatically generated
  66     messages ("delivery status notifications" - hence the name of the option).
  67
  68 14. The smtp transport has a new option called hosts_avoid_pipelining.
  69
  70 15. By default, exigrep does case-insensitive matches. There is now a -I option
  71     that makes it case-sensitive.
  72
  73 16. A number of new features ("addresses", "map", "filter", and "reduce") have
  74     been added to string expansions to make it easier to process lists of
  75     items, typically addresses.
  76
  77 17. There's a new ACL modifier called "continue". It does nothing of itself,
  78     and processing of the ACL always continues with the next condition or
  79     modifier. It is provided so that the side effects of expanding its argument
  80     can be used.
  81
  82 18. It is now possible to use newline and other control characters (those with
  83     values less than 32, plus DEL) as separators in lists.
  84
  85 19. The exigrep utility now has a -v option, which inverts the matching
  86     condition.
  87
  88 20. The host_find_failed option in the manualroute router can now be set to
  89     "ignore".
  90
  91
  92 Version 4.66
  93 ------------
  94
  95 No new features were added to 4.66.
  96
  97
  98 Version 4.65
  99 ------------
 100
 101 No new features were added to 4.65.
 102
 103
 104 Version 4.64
 105 ------------
 106
 107  1. ACL variables can now be given arbitrary names, as long as they start with
 108     "acl_c" or "acl_m" (for connection variables and message variables), are at
 109     least six characters long, with the sixth character being either a digit or
 110     an underscore.
 111
 112  2. There is a new ACL modifier called log_reject_target. It makes it possible
 113     to specify which logs are used for messages about ACL rejections.
 114
 115  3. There is a new authenticator called "dovecot". This is an interface to the
 116     authentication facility of the Dovecot POP/IMAP server, which can support a
 117     number of authentication methods.
 118
 119  4. The variable $message_headers_raw provides a concatenation of all the
 120     messages's headers without any decoding. This is in contrast to
 121     $message_headers, which does RFC2047 decoding on the header contents.
 122
 123  5. In a DNS black list, if two domain names, comma-separated, are given, the
 124     second is used first to do an initial check, making use of any IP value
 125     restrictions that are set. If there is a match, the first domain is used,
 126     without any IP value restrictions, to get the TXT record.
 127
 128  6. All authenticators now have a server_condition option.
 129
 130  7. There is a new command-line option called -Mset. It is useful only in
 131     conjunction with -be (that is, when testing string expansions). It must be
 132     followed by a message id; Exim loads the given message from its spool
 133     before doing the expansions.
 134
 135  8. Another similar new command-line option is called -bem. It operates like
 136     -be except that it must be followed by the name of a file that contains a
 137     message.
 138
 139  9. When an address is delayed because of a 4xx response to a RCPT command, it
 140     is now the combination of sender and recipient that is delayed in
 141     subsequent queue runs until its retry time is reached.
 142
 143 10. Unary negation and the bitwise logical operators and, or, xor, not, and
 144     shift, have been added to the eval: and eval10: expansion items.
 145
 146 11. The variables $interface_address and $interface_port have been renamed
 147     as $received_ip_address and $received_port, to make it clear that they
 148     relate to message reception rather than delivery. (The old names remain
 149     available for compatibility.)
 150
 151 12. The "message" modifier can now be used on "accept" and "discard" acl verbs
 152     to vary the message that is sent when an SMTP command is accepted.
 153
 154
 155 Version 4.63
 156 ------------
 157
 158 1. There is a new Boolean option called filter_prepend_home for the redirect
 159    router.
 160
 161 2. There is a new acl, set by acl_not_smtp_start, which is run right at the
 162    start of receiving a non-SMTP message, before any of the message has been
 163    read.
 164
 165 3. When an SMTP error message is specified in a "message" modifier in an ACL,
 166    or in a :fail: or :defer: message in a redirect router, Exim now checks the
 167    start of the message for an SMTP error code.
 168
 169 4. There is a new parameter for LDAP lookups called "referrals", which takes
 170    one of the settings "follow" (the default) or "nofollow".
 171
 172 5. Version 20070721.2 of exipick now included, offering these new options:
 173     --reverse
 174         After all other sorting options have bee processed, reverse order
 175         before displaying messages (-R is synonym).
 176     --random
 177         Randomize order of matching messages before displaying.
 178     --size
 179         Instead of displaying the matching messages, display the sum
 180         of their sizes.
 181     --sort <variable>[,<variable>...]
 182         Before displaying matching messages, sort the messages according to
 183         each messages value for each variable.
 184     --not
 185         Negate the value for every test (returns inverse output from the
 186         same criteria without --not).
 187
 188
 189 Version 4.62
 190 ------------
 191
 192 1. The ${readsocket expansion item now supports Internet domain sockets as well
 193    as Unix domain sockets. If the first argument begins "inet:", it must be of
 194    the form "inet:host:port". The port is mandatory; it may be a number or the
 195    name of a TCP port in /etc/services. The host may be a name, or it may be an
 196    IP address. An ip address may optionally be enclosed in square brackets.
 197    This is best for IPv6 addresses. For example:
 198
 199      ${readsocket{inet:[::1]:1234}{<request data>}...
 200
 201    Only a single host name may be given, but if looking it up yield more than
 202    one IP address, they are each tried in turn until a connection is made. Once
 203    a connection has been made, the behaviour is as for ${readsocket with a Unix
 204    domain socket.
 205
 206 2. If a redirect router sets up file or pipe deliveries for more than one
 207    incoming address, and the relevant transport has batch_max set greater than
 208    one, a batch delivery now occurs.
 209
 210 3. The appendfile transport has a new option called maildirfolder_create_regex.
 211    Its value is a regular expression. For a maildir delivery, this is matched
 212    against the maildir directory; if it matches, Exim ensures that a
 213    maildirfolder file is created alongside the new, cur, and tmp directories.
 214
 215
 216 Version 4.61
 217 ------------
 218
 219 The documentation is up-to-date for the 4.61 release. Major new features since
 220 the 4.60 release are:
 221
 222 . An option called disable_ipv6, to disable the use of IPv6 completely.
 223
 224 . An increase in the number of ACL variables to 20 of each type.
 225
 226 . A change to use $auth1, $auth2, and $auth3 in authenticators instead of $1,
 227   $2, $3, (though those are still set) because the numeric variables get used
 228   for other things in complicated expansions.
 229
 230 . The default for rfc1413_query_timeout has been changed from 30s to 5s.
 231
 232 . It is possible to use setclassresources() on some BSD OS to control the
 233   resources used in pipe deliveries.
 234
 235 . A new ACL modifier called add_header, which can be used with any verb.
 236
 237 . More errors are detectable in retry rules.
 238
 239 There are a number of other additions too.
 240
 241
 242 Version 4.60
 243 ------------
 244
 245 The documentation is up-to-date for the 4.60 release. Major new features since
 246 the 4.50 release are:
 247
 248 . Support for SQLite.
 249
 250 . Support for IGNOREQUOTA in LMTP.
 251
 252 . Extensions to the "submission mode" features.
 253
 254 . Support for Client SMTP Authorization (CSA).
 255
 256 . Support for ratelimiting hosts and users.
 257
 258 . New expansion items to help with the BATV "prvs" scheme.
 259
 260 . A "match_ip" condition, that matches an IP address against a list.
 261
 262 There are many more minor changes.
 263
 264 ****