| 1 | $Cambridge: exim/doc/doc-txt/NewStuff,v 1.146 2007/04/17 13:06:10 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 4.67 |
| 12 | ------------ |
| 13 | |
| 14 | 1. There is a new log selector called smtp_no_mail, which is not included in |
| 15 | the default setting. When it is set, a line is written to the main log |
| 16 | whenever an accepted SMTP connection terminates without having issued a |
| 17 | MAIL command. |
| 18 | |
| 19 | 2. When an item in a dnslists list is followed by = and & and a list of IP |
| 20 | addresses, the behaviour was not clear when the lookup returned more than |
| 21 | one IP address. This has been solved by the addition of == and =& for "all" |
| 22 | rather than the defaule "any" matching. |
| 23 | |
| 24 | 3. Up till now, the only control over which cipher suites GnuTLS uses has been |
| 25 | for the cipher algorithms. New options have been added to allow some of the |
| 26 | other parameters to be varied. |
| 27 | |
| 28 | 4. There is a new compile-time option called ENABLE_DISABLE_FSYNC. When it is |
| 29 | set, Exim compiles a runtime option called disable_fsync. |
| 30 | |
| 31 | 5. There is a new variable called $smtp_count_at_connection_start. |
| 32 | |
| 33 | 6. There's a new control called no_pipelining. |
| 34 | |
| 35 | 7. There are two new variables called $sending_ip_address and $sending_port. |
| 36 | These are set whenever an SMTP connection to another host has been set up. |
| 37 | |
| 38 | 8. The expansion of the helo_data option in the smtp transport now happens |
| 39 | after the connection to the server has been made. |
| 40 | |
| 41 | 9. There is a new expansion operator ${rfc2047d: that decodes strings that |
| 42 | are encoded as per RFC 2047. |
| 43 | |
| 44 | 10. There is a new log selector called "pid", which causes the current process |
| 45 | id to be added to every log line, in square brackets, immediately after the |
| 46 | time and date. |
| 47 | |
| 48 | 11. Exim has been modified so that it flushes SMTP output before implementing |
| 49 | a delay in an ACL. It also flushes the output before performing a callout, |
| 50 | as this can take a substantial time. These behaviours can be disabled by |
| 51 | obeying control = no_delay_flush or control = no_callout_flush, |
| 52 | respectively, at some earlier stage of the connection. |
| 53 | |
| 54 | 12. There are two new expansion conditions that iterate over a list. They are |
| 55 | called forany and forall. |
| 56 | |
| 57 | 13. There's a new global option called dsn_from that can be used to vary the |
| 58 | contents of From: lines in bounces and other automatically generated |
| 59 | messages ("delivery status notifications" - hence the name of the option). |
| 60 | |
| 61 | 14. The smtp transport has a new option called hosts_avoid_pipelining. |
| 62 | |
| 63 | 15. By default, exigrep does case-insensitive matches. There is now a -I option |
| 64 | that makes it case-sensitive. |
| 65 | |
| 66 | 16. A number of new features ("addresses", "map", "filter", and "reduce") have |
| 67 | been added to string expansions to make it easier to process lists of |
| 68 | items, typically addresses. |
| 69 | |
| 70 | 17. There's a new ACL modifier called "continue". It does nothing of itself, |
| 71 | and processing of the ACL always continues with the next condition or |
| 72 | modifier. It is provided so that the side effects of expanding its argument |
| 73 | can be used. |
| 74 | |
| 75 | 18. It is now possible to use newline and other control characters (those with |
| 76 | values less than 32, plus DEL) as separators in lists. |
| 77 | |
| 78 | 19. The exigrep utility now has a -v option, which inverts the matching |
| 79 | condition. |
| 80 | |
| 81 | 20. The host_find_failed option in the manualroute router can now be set to |
| 82 | "ignore". |
| 83 | |
| 84 | |
| 85 | Version 4.66 |
| 86 | ------------ |
| 87 | |
| 88 | No new features were added to 4.66. |
| 89 | |
| 90 | |
| 91 | Version 4.65 |
| 92 | ------------ |
| 93 | |
| 94 | No new features were added to 4.65. |
| 95 | |
| 96 | |
| 97 | Version 4.64 |
| 98 | ------------ |
| 99 | |
| 100 | 1. ACL variables can now be given arbitrary names, as long as they start with |
| 101 | "acl_c" or "acl_m" (for connection variables and message variables), are at |
| 102 | least six characters long, with the sixth character being either a digit or |
| 103 | an underscore. |
| 104 | |
| 105 | 2. There is a new ACL modifier called log_reject_target. It makes it possible |
| 106 | to specify which logs are used for messages about ACL rejections. |
| 107 | |
| 108 | 3. There is a new authenticator called "dovecot". This is an interface to the |
| 109 | authentication facility of the Dovecot POP/IMAP server, which can support a |
| 110 | number of authentication methods. |
| 111 | |
| 112 | 4. The variable $message_headers_raw provides a concatenation of all the |
| 113 | messages's headers without any decoding. This is in contrast to |
| 114 | $message_headers, which does RFC2047 decoding on the header contents. |
| 115 | |
| 116 | 5. In a DNS black list, if two domain names, comma-separated, are given, the |
| 117 | second is used first to do an initial check, making use of any IP value |
| 118 | restrictions that are set. If there is a match, the first domain is used, |
| 119 | without any IP value restrictions, to get the TXT record. |
| 120 | |
| 121 | 6. All authenticators now have a server_condition option. |
| 122 | |
| 123 | 7. There is a new command-line option called -Mset. It is useful only in |
| 124 | conjunction with -be (that is, when testing string expansions). It must be |
| 125 | followed by a message id; Exim loads the given message from its spool |
| 126 | before doing the expansions. |
| 127 | |
| 128 | 8. Another similar new command-line option is called -bem. It operates like |
| 129 | -be except that it must be followed by the name of a file that contains a |
| 130 | message. |
| 131 | |
| 132 | 9. When an address is delayed because of a 4xx response to a RCPT command, it |
| 133 | is now the combination of sender and recipient that is delayed in |
| 134 | subsequent queue runs until its retry time is reached. |
| 135 | |
| 136 | 10. Unary negation and the bitwise logical operators and, or, xor, not, and |
| 137 | shift, have been added to the eval: and eval10: expansion items. |
| 138 | |
| 139 | 11. The variables $interface_address and $interface_port have been renamed |
| 140 | as $received_ip_address and $received_port, to make it clear that they |
| 141 | relate to message reception rather than delivery. (The old names remain |
| 142 | available for compatibility.) |
| 143 | |
| 144 | 12. The "message" modifier can now be used on "accept" and "discard" acl verbs |
| 145 | to vary the message that is sent when an SMTP command is accepted. |
| 146 | |
| 147 | |
| 148 | Version 4.63 |
| 149 | ------------ |
| 150 | |
| 151 | 1. There is a new Boolean option called filter_prepend_home for the redirect |
| 152 | router. |
| 153 | |
| 154 | 2. There is a new acl, set by acl_not_smtp_start, which is run right at the |
| 155 | start of receiving a non-SMTP message, before any of the message has been |
| 156 | read. |
| 157 | |
| 158 | 3. When an SMTP error message is specified in a "message" modifier in an ACL, |
| 159 | or in a :fail: or :defer: message in a redirect router, Exim now checks the |
| 160 | start of the message for an SMTP error code. |
| 161 | |
| 162 | 4. There is a new parameter for LDAP lookups called "referrals", which takes |
| 163 | one of the settings "follow" (the default) or "nofollow". |
| 164 | |
| 165 | 5. Version 20070721.2 of exipick now included, offering these new options: |
| 166 | --reverse |
| 167 | After all other sorting options have bee processed, reverse order |
| 168 | before displaying messages (-R is synonym). |
| 169 | --random |
| 170 | Randomize order of matching messages before displaying. |
| 171 | --size |
| 172 | Instead of displaying the matching messages, display the sum |
| 173 | of their sizes. |
| 174 | --sort <variable>[,<variable>...] |
| 175 | Before displaying matching messages, sort the messages according to |
| 176 | each messages value for each variable. |
| 177 | --not |
| 178 | Negate the value for every test (returns inverse output from the |
| 179 | same criteria without --not). |
| 180 | |
| 181 | |
| 182 | Version 4.62 |
| 183 | ------------ |
| 184 | |
| 185 | 1. The ${readsocket expansion item now supports Internet domain sockets as well |
| 186 | as Unix domain sockets. If the first argument begins "inet:", it must be of |
| 187 | the form "inet:host:port". The port is mandatory; it may be a number or the |
| 188 | name of a TCP port in /etc/services. The host may be a name, or it may be an |
| 189 | IP address. An ip address may optionally be enclosed in square brackets. |
| 190 | This is best for IPv6 addresses. For example: |
| 191 | |
| 192 | ${readsocket{inet:[::1]:1234}{<request data>}... |
| 193 | |
| 194 | Only a single host name may be given, but if looking it up yield more than |
| 195 | one IP address, they are each tried in turn until a connection is made. Once |
| 196 | a connection has been made, the behaviour is as for ${readsocket with a Unix |
| 197 | domain socket. |
| 198 | |
| 199 | 2. If a redirect router sets up file or pipe deliveries for more than one |
| 200 | incoming address, and the relevant transport has batch_max set greater than |
| 201 | one, a batch delivery now occurs. |
| 202 | |
| 203 | 3. The appendfile transport has a new option called maildirfolder_create_regex. |
| 204 | Its value is a regular expression. For a maildir delivery, this is matched |
| 205 | against the maildir directory; if it matches, Exim ensures that a |
| 206 | maildirfolder file is created alongside the new, cur, and tmp directories. |
| 207 | |
| 208 | |
| 209 | Version 4.61 |
| 210 | ------------ |
| 211 | |
| 212 | The documentation is up-to-date for the 4.61 release. Major new features since |
| 213 | the 4.60 release are: |
| 214 | |
| 215 | . An option called disable_ipv6, to disable the use of IPv6 completely. |
| 216 | |
| 217 | . An increase in the number of ACL variables to 20 of each type. |
| 218 | |
| 219 | . A change to use $auth1, $auth2, and $auth3 in authenticators instead of $1, |
| 220 | $2, $3, (though those are still set) because the numeric variables get used |
| 221 | for other things in complicated expansions. |
| 222 | |
| 223 | . The default for rfc1413_query_timeout has been changed from 30s to 5s. |
| 224 | |
| 225 | . It is possible to use setclassresources() on some BSD OS to control the |
| 226 | resources used in pipe deliveries. |
| 227 | |
| 228 | . A new ACL modifier called add_header, which can be used with any verb. |
| 229 | |
| 230 | . More errors are detectable in retry rules. |
| 231 | |
| 232 | There are a number of other additions too. |
| 233 | |
| 234 | |
| 235 | Version 4.60 |
| 236 | ------------ |
| 237 | |
| 238 | The documentation is up-to-date for the 4.60 release. Major new features since |
| 239 | the 4.50 release are: |
| 240 | |
| 241 | . Support for SQLite. |
| 242 | |
| 243 | . Support for IGNOREQUOTA in LMTP. |
| 244 | |
| 245 | . Extensions to the "submission mode" features. |
| 246 | |
| 247 | . Support for Client SMTP Authorization (CSA). |
| 248 | |
| 249 | . Support for ratelimiting hosts and users. |
| 250 | |
| 251 | . New expansion items to help with the BATV "prvs" scheme. |
| 252 | |
| 253 | . A "match_ip" condition, that matches an IP address against a list. |
| 254 | |
| 255 | There are many more minor changes. |
| 256 | |
| 257 | **** |