X-Git-Url: https://git.exim.org/users/heiko/exim.git/blobdiff_plain/66afa40353d7dccfb7d35d6d67bf6408d46bbe8f..0f2cbd1b451dd142a372b6b0985c4ce2f37c04eb:/doc/doc-txt/ChangeLog

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-$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.238 2005/09/19 18:00:47 fanf2 Exp $
+$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.510 2007/05/31 12:41:49 magnus Exp $
 
 Change log file for Exim from version 4.21
 -------------------------------------------
 
+Exim version 4.68
+-----------------
+
+PH/01 Another patch from the Sieve maintainer.
+
+PH/02 When an IPv6 address is converted to a string for single-key lookup
+      in an address list (e.g. for an item such as "net24-dbm;/net/works"),
+      dots are used instead of colons so that keys in lsearch files need not
+      contain colons. This was done some time before quoting was made available
+      in lsearch files. However, iplsearch files do require colons in IPv6 keys
+      (notated using the quote facility) so as to distinguish them from IPv4
+      keys. This meant that lookups for IP addresses in host lists did not work
+      for iplsearch lookups.
+
+      This has been fixed by arranging for IPv6 addresses to be expressed with
+      colons if the lookup type is iplsearch. This is not incompatible, because
+      previously such lookups could never work.
+
+      The situation is now rather anomolous, since one *can* have colons in
+      ordinary lsearch keys. However, making the change in all cases is
+      incompatible and would probably break a number of configurations.
+
+TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
+      version.
+
+MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
+      conversion specification without a maximum field width, thereby enabling
+      a rogue spamd server to cause a buffer overflow. While nobody in their
+      right mind would setup Exim to query an untrusted spamd server, an
+      attacker that gains access to a server running spamd could potentially
+      exploit this vulnerability to run arbitrary code as the Exim user.
+
+TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
+      $primary_hostname instead of what libspf2 thinks the hosts name is.
+
+MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
+      a directory entry by the name of the lookup key. Previously, if a
+      symlink pointed to a non-existing file or a file in a directory that
+      Exim lacked permissions to read, a lookup for a key matching that
+      symlink would fail. Now it is enough that a matching directory entry
+      exists, symlink or not. (Bugzilla 503.)
+
+
+Exim version 4.67
+-----------------
+
+MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
+      is unset (happens when testing with -bh and -oMi isn't used). Thanks to
+      Jan Srzednicki.
+
+PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
+      issue a MAIL command.
+
+PH/02 In an ACL statement such as
+
+        deny dnslists = X!=127.0.0.2 : X=127.0.0.2
+
+      if a client was not listed at all, or was listed with a value other than
+      127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
+      the condition was not true (as it should be), so access was not denied.
+      The bug was that the ! inversion was incorrectly passed on to the second
+      item. This has been fixed.
+
+PH/03 Added additional dnslists conditions == and =& which are different from
+      = and & when the dns lookup returns more than one IP address.
+
+PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
+      cipher suites used by GnuTLS. These options are ignored by OpenSSL.
+
+PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
+      FSYNC, which compiles an option called disable_fsync that allows for
+      bypassing fsync(). The documentation is heavily laced with warnings.
+
+SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
+
+PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
+      with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
+      to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
+      including adding "make clean"; (3) Added -fPIC when compiling the test
+      dynamically loaded module, to get rid of a warning.
+
+MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
+      message fails, move_frozen_messages = true and ignore_bounce_errors_after
+      = 0s. The bug is otherwise harmless.
+
+PH/07 There was a bug in the dovecot authenticator such that the value of
+      $auth1 could be overwritten, and so not correctly preserved, after a
+      successful authentication. This usually meant that the value preserved by
+      the server_setid option was incorrect.
+
+PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
+
+PH/09 Installed PCRE release 7.0.
+
+PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
+      run for batched SMTP input. It is now run at the start of every message
+      in the batch. While fixing this I discovered that the process information
+      (output by running exiwhat) was not always getting set for -bs and -bS
+      input. This is fixed, and it now also says "batched" for BSMTP.
+
+PH/11 Added control=no_pipelining.
+
+PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
+      patch, slightly modified), and move the expansion of helo_data till after
+      the connection is made in the smtp transport (so it can use these
+      values).
+
+PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
+
+PH/14 Added log_selector = +pid.
+
+PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
+
+PH/16 Add ${if forany and ${if forall.
+
+PH/17 Added dsn_from option to vary the From: line in DSNs.
+
+PH/18 Flush SMTP output before performing a callout, unless control =
+      no_callout_flush is set.
+
+PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
+      was true (the default) a successful delivery failed to delete the retry
+      item, thus causing premature timeout of the address. The bug is now
+      fixed.
+
+PH/20 Added hosts_avoid_pipelining to the smtp transport.
+
+PH/21 Long custom messages for fakedefer and fakereject are now split up
+      into multiline reponses in the same way that messages for "deny" and
+      other ACL rejections are.
+
+PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
+      with slight modification.
+
+PH/23 Applied sieve patches from the maintainer "tracking the latest notify
+      draft, changing the syntax and factoring some duplicate code".
+
+PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
+      for deliveries of the second and subsequent messages over the same SMTP
+      connection.
+
+PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
+      ${reduce, with only minor "tidies".
+
+SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
+
+PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
+      expansion side effects.
+
+PH/27 When a message times out after an over-quota error from an Exim-imposed
+      quota, the bounce message says "mailbox is full". This message was not
+      being given when it was a system quota that was exceeded. It now should
+      be the same.
+
+MH/03 Made $recipients available in local_scan(). local_scan() already has
+      better access to the recipient list through recipients_list[], but
+      $recipients can be useful in postmaster-provided expansion strings.
+
+PH/28 The $smtp_command and $smtp_command_argument variables were not correct
+      in the case of a MAIL command with additional options following the
+      address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
+      were accidentally chopped off.
+
+PH/29 SMTP synchronization checks are implemented when a command is read -
+      there is a check that no more input is waiting when there shouldn't be
+      any. However, for some commands, a delay in an ACL can mean that it is
+      some time before the response is written. In this time, more input might
+      arrive, invalidly. So now there are extra checks after an ACL has run for
+      HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
+      pipelining has not been advertised.
+
+PH/30 MH's patch to allow iscntrl() characters to be list separators.
+
+PH/31 Unlike :fail:, a custom message specified with :defer: was not being
+      returned in the SMTP response when smtp_return_error_details was false.
+      This has been fixed.
+
+PH/32 Change the Dovecot authenticator to use read() and write() on the socket
+      instead of the C I/O that was originally supplied, because problems were
+      reported on Solaris.
+
+PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
+      Exim which did not show up earlier: it was assuming that a call to
+      SSL_CTX_set_info_callback() might give an error value. In fact, there is
+      no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
+      was a macro that became an assignment, so it seemed to work. This has
+      changed to a proper function call with a void return, hence the compile
+      error. Exim's code has been fixed.
+
+PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
+      cpus.
+
+PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
+
+PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
+
+PH/37 If a message is not accepted after it has had an id assigned (e.g.
+      because it turns out to be too big or there is a timeout) there is no
+      "Completed" line in the log. When some messages of this type were
+      selected by exigrep, they were listed as "not completed". Others were
+      picked up by some special patterns. I have improved the selection
+      criteria to be more general.
+
+PH/38 The host_find_failed option in the manualroute router can now be set
+      to "ignore", to completely ignore a host whose IP address cannot be
+      found. If all hosts are ignored, the behaviour is controlled by the new
+      host_all_ignored option.
+
+PH/39 In a list of hosts for manualroute, if one item (either because of multi-
+      homing or because of multiple MX records with /mx) generated more than
+      one IP address, and the following item turned out to be the local host,
+      all the secondary addresses of the first item were incorrectly removed
+      from the list, along with the local host and any following hosts (which
+      is what is supposed to happen).
+
+PH/40 When Exim receives a message, it writes the login name, uid, and gid of
+      whoever called Exim into the -H file. In the case of the daemon it was
+      behaving confusingly. When first started, it used values for whoever
+      started the daemon, but after a SIGHUP it used the Exim user (because it
+      calls itself on a restart). I have changed the code so that it now always
+      uses the Exim user.
+
+PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
+      message are rejected with the same error (e.g. no authentication or bad
+      sender address), and a DATA command is nevertheless sent (as can happen
+      with PIPELINING or a stupid MUA), the error message that was given to the
+      RCPT commands is included in the rejection of the DATA command. This is
+      intended to be helpful for MUAs that show only the final error to their
+      users.
+
+PH/42 Another patch from the Sieve maintainer.
+
+SC/02 Eximstats - Differentiate between permanent and temporary rejects.
+      Eximstats - Fixed some broken HTML links and added missing column headers
+                  (Jez Hancock).
+      Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
+                  columns for Rejects, Temp Rejects, Ham, and Spam rows.
+
+SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
+
+PH/43 Yet another patch from the Sieve maintainer.
+
+PH/44 I found a way to check for a TCP/IP connection going away before sending
+      the response to the final '.' that terminates a message, but only in the
+      case where the client has not sent further data following the '.'
+      (unfortunately, this is allowed). However, in many cases there won't be
+      any further data because there won't be any more messages to send. A call
+      to select() can be used: if it shows that the input is "ready", there is
+      either input waiting, or the socket has been closed. An attempt to read
+      the next input character can distinguish the two cases. Previously, Exim
+      would have sent an OK response which the client would never have see.
+      This could lead to message repetition. This fix should cure that, at
+      least in a lot of common cases.
+
+PH/45 Do not advertise STARTTLS in response to HELP unless it would be
+      advertised in response to EHLO.
+
+
+Exim version 4.66
+-----------------
+
+PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
+      fixed by 4.65/MH/01 (is this a record?) are fixed:
+
+      (i)  An empty string was always treated as zero by the numeric comparison
+           operators. This behaviour has been restored.
+
+      (ii) It is documented that the numeric comparison operators always treat
+           their arguments as decimal numbers. This was broken in that numbers
+           starting with 0 were being interpreted as octal.
+
+      While fixing these problems I realized that there was another issue that
+      hadn't been noticed. Values of message_size_limit (both the global option
+      and the transport option) were treated as octal if they started with 0.
+      The documentation was vague. These values are now always treated as
+      decimal, and I will make that clear in the documentation.
+
+
+Exim version 4.65
+-----------------
+
+TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
+      Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
+      versions. (#438)
+
+MH/01 Don't check that the operands of numeric comparison operators are
+      integers when their expansion is in "skipping" mode (fixes bug
+      introduced by 4.64-PH/07).
+
+PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
+      child addresses, Exim now panics and dies. Previously, because the count
+      is held in a short int, deliveries were likely to be lost. As such a
+      large number of recipients for a single message is ridiculous
+      (performance will be very, very poor), I have chosen to impose a limit
+      rather than extend the field.
+
+
+Exim version 4.64
+-----------------
+
+TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
+      leftover -K file (the existence of which was triggered by #402).
+      While we were at it, introduced process PID as part of the -K
+      filename. This should rule out race conditions when creating
+      these files.
+
+TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
+      processing considerably. Previous code took too long for large mails,
+      triggering a timeout which in turn triggers #401.
+
+TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
+      in the DK code in transports.c. sendfile() is not really portable,
+      hence the _LINUX specificness.
+
+TF/01 In the add_headers option to the mail command in an Exim filter,
+      there was a bug that Exim would claim a syntax error in any
+      header after the first one which had an odd number of characters
+      in the field name.
+
+PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
+      callout verification, Exim cached a "reject" for the entire domain. This
+      is correct for most verifications, but it is not correct for a recipient
+      verification with use_sender or use_postmaster set, because in that case
+      the callout does not use MAIL FROM:<>. Exim now distinguishes the special
+      case of MAIL FROM:<> rejection from other early rejections (e.g.
+      rejection of HELO). When verifying a recipient using a non-null MAIL
+      address, the cache is ignored if it shows MAIL FROM:<> rejection.
+      Whatever the result of the callout, the value of the domain cache is
+      left unchanged (for any other kind of callout, getting as far as trying
+      RCPT means that the domain itself is ok).
+
+PH/02 Tidied a number of unused variable and signed/unsigned warnings that
+      gcc 4.1.1 threw up.
+
+PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
+      manifest itself as EPIPE rather than ECONNECT. When tidying away a
+      session, the daemon ignores ECONNECT errors and logs others; it now
+      ignores EPIPE as well.
+
+PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
+      (quoted-printable decoding).
+
+PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
+      later the small subsequent patch to fix an introduced bug.
+
+PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
+
+PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
+
+PH/08 An error is now given if message_size_limit is specified negative.
+
+PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
+      to be given (somewhat) arbitrary names.
+
+JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
+      in 4.64-PH/09.
+
+JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
+      miscellaneous code fixes
+
+PH/10 Added the log_reject_target ACL modifier to specify where to log
+      rejections.
+
+PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
+      hostname. This is wrong, because it relates to the incoming message (and
+      probably the interface on which it is arriving) and not to the outgoing
+      callout (which could be using a different interface). This has been
+      changed to use the value of the helo_data option from the smtp transport
+      instead - this is what is used when a message is actually being sent. If
+      there is no remote transport (possible with a router that sets up host
+      addresses), $smtp_active_hostname is used.
+
+PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
+      tweaks were necessary in order to get it to work (see also 21 below):
+      (a) The code assumed that strncpy() returns a negative number on buffer
+          overflow, which isn't the case. Replaced with Exim's string_format()
+          function.
+      (b) There were several signed/unsigned issues. I just did the minimum
+          hacking in of casts. There is scope for a larger refactoring.
+      (c) The code used strcasecmp() which is not a standard C function.
+          Replaced with Exim's strcmpic() function.
+      (d) The code set only $1; it now sets $auth1 as well.
+      (e) A simple test gave the error "authentication client didn't specify
+          service in request". It would seem that Dovecot has changed its
+          interface. Fortunately there's a specification; I followed it and
+          changed what the client sends and it appears to be working now.
+
+PH/13 Added $message_headers_raw to provide the headers without RFC 2047
+      decoding.
+
+PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
+      address A is aliased to B and C, where B exists and C does not. Without
+      -v the output is "A verified" because verification stops after a
+      successful redirection if more than one address is generated. However,
+      with -v the child addresses are also verified. Exim was outputting "A
+      failed to verify" and then showing the successful verification for C,
+      with its parentage. It now outputs "B failed to verify", showing B's
+      parentage before showing the successful verification of C.
+
+PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
+      look up a TXT record in a specific list after matching in a combined
+      list.
+
+PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
+      RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
+      they consult the DNS. I had assumed they would set it the way they
+      wanted; and indeed my experiments on Linux seem to show that in some
+      cases they do (I could influence IPv6 lookups but not IPv4 lookups).
+      To be on the safe side, however, I have now made the interface to
+      host_find_byname() similar to host_find_bydns(), with an argument
+      containing the DNS resolver options. The host_find_byname() function now
+      sets these options at its start, just as host_find_bydns() does. The smtp
+      transport options dns_qualify_single and dns_search_parents are passed to
+      host_find_byname() when gethostbyname=TRUE in this transport. Other uses
+      of host_find_byname() use the default settings of RES_DEFNAMES
+      (qualify_single) but not RES_DNSRCH (search_parents).
+
+PH/17 Applied (a modified version of) Nico Erfurth's patch to make
+      spool_read_header() do less string testing, by means of a preliminary
+      switch on the second character of optional "-foo" lines. (This is
+      overdue, caused by the large number of possibilities that now exist.
+      Originally there were few.) While I was there, I also converted the
+      str(n)cmp tests so they don't re-test the leading "-" and the first
+      character, in the hope this might squeeze out yet more improvement.
+
+PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
+      flag allowing group syntax was set by the header_syntax check but not
+      turned off, possible causing trouble later; (2) The flag was not being
+      set at all for the header_verify test, causing "group"-style headers to
+      be rejected. I have now set it in this case, and also caused header_
+      verify to ignore an empty address taken from a group. While doing this, I
+      came across some other cases where the code for allowing group syntax
+      while scanning a header line wasn't quite right (mostly, not resetting
+      the flag correctly in the right place). These bugs could have caused
+      trouble for malformed header lines. I hope it is now all correct.
+
+PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
+      with the "reply" argument non-NULL. The code, however (which originally
+      came from elsewhere) had *some* tests for NULL when it wrote to *reply,
+      but it didn't always do it. This confused somebody who was copying the
+      code for some other use. I have removed all the tests.
+
+PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
+      feature that was used to support insecure browsers during the U.S. crypto
+      embargo. It requires special client support, and Exim is probably the
+      only MTA that supported it -- and would never use it because real RSA is
+      always available. This code has been removed, because it had the bad
+      effect of slowing Exim down by computing (never used) parameters for the
+      RSA_EXPORT functionality.
+
+PH/21 On the advice of Timo Sirainen, added a check to the dovecot
+      authenticator to fail if there's a tab character in the incoming data
+      (there should never be unless someone is messing about, as it's supposed
+      to be base64-encoded). Also added, on Timo's advice, the "secured" option
+      if the connection is using TLS or if the remote IP is the same as the
+      local IP, and the "valid-client-cert option" if a client certificate has
+      been verified.
+
+PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
+      authenticators. This can be used for authorization after authentication
+      succeeds. (In the case of plaintext, it servers for both authentication
+      and authorization.)
+
+PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
+      if any retry times were supplied.
+
+PH/24 Exim crashed if verify=helo was activated during an incoming -bs
+      connection, where there is no client IP address to check. In this
+      situation, the verify now always succeeds.
+
+PH/25 Applied John Jetmore's -Mset patch.
+
+PH/26 Added -bem to be like -Mset, but loading a message from a file.
+
+PH/27 In a string expansion for a processed (not raw) header when multiple
+      headers of the same name were present, leading whitespace was being
+      removed from all of them, but trailing whitespace was being removed only
+      from the last one. Now trailing whitespace is removed from each header
+      before concatenation. Completely empty headers in a concatenation (as
+      before) are ignored.
+
+PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
+      Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
+
+PH/29 [Removed. This was a change that I later backed out, and forgot to
+      correct the ChangeLog entry (that I had efficiently created) before
+      committing the later change.]
+
+PH/30 Exim was sometimes attempting to deliver messages that had suffered
+      address errors (4xx response to RCPT) over the same connection as other
+      messages routed to the same hosts. Such deliveries are always "forced",
+      so retry times are not inspected. This resulted in far too many retries
+      for the affected addresses. The effect occurred only when there were more
+      hosts than the hosts_max_try setting in the smtp transport when it had
+      the 4xx errors. Those hosts that it had tried were not added to the list
+      of hosts for which the message was waiting, so if all were tried, there
+      was no problem. Two fixes have been applied:
+
+      (i)  If there are any address or message errors in an SMTP delivery, none
+           of the hosts (tried or untried) are now added to the list of hosts
+           for which the message is waiting, so the message should not be a
+           candidate for sending over the same connection that was used for a
+           successful delivery of some other message. This seems entirely
+           reasonable: after all the message is NOT "waiting for some host".
+           This is so "obvious" that I'm not sure why it wasn't done
+           previously. Hope I haven't missed anything, but it can't do any
+           harm, as the worst effect is to miss an optimization.
+
+      (ii) If, despite (i), such a delivery is accidentally attempted, the
+           routing retry time is respected, so at least it doesn't keep
+           hammering the server.
+
+PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
+      in ${readsocket because some servers need this prod.
+
+PH/32 Added some extra debug output when updating a wait-xxx database.
+
+PH/33 The hint "could be header name not terminated by colon", which has been
+      given for certain expansion errors for a long time, was not being given
+      for the ${if def:h_colon_omitted{...  case.
+
+PH/34 The spec says: "With one important exception, whenever a domain list is
+      being scanned, $domain contains the subject domain." There was at least
+      one case where this was not true.
+
+PH/35 The error "getsockname() failed: connection reset by peer" was being
+      written to the panic log as well as the main log, but it isn't really
+      panic-worthy as it just means the connection died rather early on. I have
+      removed the panic log writing for the ECONNRESET error when getsockname()
+      fails.
+
+PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
+      runs only) independently of the message's sender address. This meant
+      that, if the 4xx error was in fact related to the sender, a different
+      message to the same recipient with a different sender could confuse
+      things. In particualar, this can happen when sending to a greylisting
+      server, but other circumstances could also provoke similar problems.
+      I have changed the default so that the retry time for these errors is now
+      based a combination of the sender and recipient addresses. This change
+      can be overridden by setting address_retry_include_sender=false in the
+      smtp transport.
+
+PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
+      remote server are returned as part of bounce messages. This was not
+      happening for LMTP over a pipe (the lmtp transport), but now it is the
+      same for both kinds of LMTP.
+
+PH/38 Despite being documented as not happening, Exim was rewriting addresses
+      in header lines that were in fact CNAMEs. This is no longer the case.
+
+PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
+      and queue runs started by the daemon processed all messages. This has
+      been fixed so that -R and -S can now usefully be given with -q<time>.
+
+PH/40 Import PCRE release 6.7 (fixes some bugs).
+
+PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
+
+PH/42 Give an error if -q is specified more than once.
+
+PH/43 Renamed the variables $interface_address and $interface_port as
+      $received_ip_address and $received_port, to make it clear that these
+      values apply to message reception, and not to the outgoing interface when
+      a message is delivered. (The old names remain recognized, of course.)
+
+PH/44 There was no timeout on the connect() call when using a Unix domain
+      socket in the ${readsocket expansion. There now is.
+
+PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
+      be meaningful with "accept".
+
+SC/01 Eximstats V1.43
+     Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
+
+SC/02 Eximstats V1.44
+      Use a glob alias rather than an array ref in the generated
+      parser. This improves both readability and performance.
+
+SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
+      Collect SpamAssassin and rejection statistics.
+      Don't display local sender or destination tables unless
+      there is data to show.
+      Added average volumes into the top table text output.
+
+SC/04 Eximstats V1.46
+      Collect data on the number of addresses (recipients)
+      as well as the number of messages.
+
+SC/05 Eximstats V1.47
+      Added 'Message too big' to the list of mail rejection
+      reasons (thanks to Marco Gaiarin).
+
+SC/06 Eximstats V1.48
+      Mainlog lines which have GMT offsets and are too short to
+      have a flag are now skipped.
+
+SC/07 Eximstats V1.49 (Alain Williams)
+      Added the -emptyok flag.
+
+SC/08 Eximstats V1.50
+      Fixes for obtaining the IP address from reject messages.
+
+JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
+      (added [br]h_ prefixes, implemented RFC2047 decoding.  Fixed
+      whitesspace changes from 4.64-PH/27
+
+JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
+      match 4.64-PH/13
+
+JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
+      are found, allow negative numbers in numeric criteria)
+
+JJ/06 exipick.20061117.2, added new $message_body_missing variable
+
+JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
+      to match changes made in 4.64-PH/43
+
+PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
+
+PH/47 Put in an explicit test for a DNS lookup of an address record where the
+      "domain" is actually an IP address, and force a failure. This locks out
+      those revolvers/nameservers that support "A-for-A" lookups, in
+      contravention of the specifications.
+
+PH/48 When a host name was looked up from an IP address, and the subsequent
+      forward lookup of the name timed out, the host name was left in
+      $sender_host_name, contrary to the specification.
+
+PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
+      restricted to single-key lookups, Exim was not diagnosing an error if
+      * or *@ was used with a query-style lookup.
+
+PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
+
+MH/01 local_scan ABI version incremented to 1.1. It should have been updated
+      long ago, but noone interested enough thought of it. Let's just say that
+      the "1.1" means that there are some new functions that weren't there at
+      some point in the past.
+
+PH/51 Error processing for expansion failure of helo_data from an smtp
+      transport during callout processing was broken.
+
+PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
+      tested/used via the -bh/-bhc/-bs options.
+
+PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
+      bug, fixed in subsequent PCRE releases).
+
+PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
+      arises when using the Solaris LDAP libraries (but not with OpenLDAP).
+
+PH/55 Check for a ridiculously long file name in exim_dbmbuild.
+
+
+Exim version 4.63
+-----------------
+
+SC/01 Use a glob alias rather than an array ref in eximstats generated
+      parser. This improves both readability and performance.
+
+SC/02 Collect SpamAssassin and rejection statistics in eximstats.
+      Don't display local sender or destination tables in eximstats unless
+      there is data to show.
+      Added average volumes into the eximstats top table text output.
+
+SC/03 Collect data on the number of addresses (recipients) as well
+      as the number of messages in eximstats.
+
+TF/01 Correct an error in the documentation for the redirect router. Exim
+      does (usually) call initgroups() when daemonizing.
+
+TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
+      with consistent privilege compared to when running as a daemon.
+
+TF/03 Note in the spec that $authenticated_id is not set for local
+      submissions from trusted users.
+
+TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
+      Thanks to Dean Brooks <dean@iglou.com> for the patch.
+
+TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
+      by adding some example configuration directives to the default
+      configuration file. A little bit of work is required to uncomment the
+      directives and define how usernames and passwords are checked, but
+      there is now a framework to start from.
+
+PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
+      functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
+      without this. I don't know how relevant this is to other LDAP libraries.
+
+PH/02 Add the verb name to the "unknown ACL verb" error.
+
+PH/03 Magnus Holmgren's patch for filter_prepend_home.
+
+PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
+
+PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
+      directory not expanded when it should be if an expanded home directory
+      was set for the address (which is overridden by the transport).
+
+PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
+      libradius.
+
+PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
+      bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
+      because it is too late at that time, and has no effect.
+
+PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
+      security issue with \' (bugzilla #107). I could not use the
+      PQescapeStringConn() function, because it needs a PGconn value as one of
+      its arguments.
+
+PH/08 When testing addresses using -bt, indicate those final addresses that
+      are duplicates that would not cause an additional delivery. At least one
+      person was confused, thinking that -bt output corresponded to deliveries.
+      (Suppressing duplicates isn't a good idea as you lose the information
+      about possibly different redirections that led to the duplicates.)
+
+PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
+      systems where poll() doesn't work, in particular OS X.
+
+PH/10 Added more information to debugging output for retry time not reached.
+
+PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
+      operations in malware.c.
+
+PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
+      signatures.
+
+PH/13 If write_rejectlog was set false when logging was sent to syslog with
+      syslog_duplication set false, log lines that would normally be written
+      both the the main log and to the reject log were not written to syslog at
+      all.
+
+PH/14 In the default configuration, change the use of "message" in ACL warn
+      statements to "add_header".
+
+PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
+      not followed by a command (e.g. "seen endif").
+
+PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
+      and :defer: in a redirect router. Add forbid_smtp_code to suppress the
+      latter.
+
+PH/17 Added extra conditions to the default value of delay_warning_condition
+      so that it is now:
+
+        ${if or { \
+            { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
+            { match{$h_precedence:}{(?i)bulk|list|junk} } \
+            { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
+            }{no}{yes}}
+
+      The Auto-Submitted: and various List- headers are standardised, whereas I
+      don't think Precedence: ever was.
+
+PH/18 Refactored debugging code in route_finduser() to show more information,
+      in particular, the error code if getpwnam() issues one.
+
+PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
+      This is apparently needed in addition to the PH/07 change above to avoid
+      any possible encoding problems.
+
+PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
+      but not after initializing Perl.
+
+PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
+      output them only if debugging. By default they are written stderr,
+      apparently, which is not desirable.
+
+PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
+      queries.
+
+JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
+      --not options
+
+JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
+
+PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
+      authenticated or an ident call has been made. Suppress the default
+      values for $authenticated_id and $authenticated_sender (but permit -oMai
+      and -oMas) when testing with -bh.
+
+PH/24 Re-jigged the order of the tests in the default configuration so that the
+      tests for valid domains and recipients precede the DNS black list and CSA
+      tests, on the grounds that those ones are more expensive.
+
+PH/25 Exim was not testing for a space following SMTP commands such as EHLO
+      that require one. Thus, EHLORHUBARB was interpreted as a valid command.
+      This bug exists in every version of Exim that I still have, right back to
+      0.12.
+
+PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
+      However, an attempt to turn on case-sensitivity in a regex key by
+      including (?-i) didn't work because the subject string was already
+      lowercased, and the effects were non-intuitive. It turns out that a
+      one-line patch can be used to allow (?-i) to work as expected.
+
+
+Exim version 4.62
+-----------------
+
+TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
+      other effects) broke the use of negated acl sub-conditions.
+
+PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
+      patch).
+
+PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
+      "Deny" causes Exim to reject the incoming connection with a 554 error.
+      Unfortunately, if there is a major crisis, such as a disk failure,
+      tcp-wrappers gives "deny", whereas what one would like would be some
+      kind of temporary error. A kludge has been added to help with this.
+      Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
+      554 error is used if errno is still zero or contains ENOENT (which occurs
+      if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
+      451 error is used.
+
+PH/03 Add -lutil to the default FreeBSD LIBS setting.
+
+PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
+      errors. Otherwise a message that provokes a temporary error (when other
+      messages do not) can cause a whole host to time out.
+
+PH/05 Batch deliveries by appendfile and pipe transports did not work when the
+      addresses were routed directly to files or pipes from a redirect router.
+      File deliveries just didn't batch; pipe deliveries might have suffered
+      odd errors.
+
+PH/06 A failure to get a lock for a hints database would erroneously always say
+      "Failed to get write lock", even when it was really a read lock.
+
+PH/07 The appendfile transport was creating MBX lock files with a fixed mode
+      of 0600. This has been changed to use the value of the lockfile_mode
+      option (which defaults to 0600).
+
+PH/08 Applied small patch from the Sieve maintainer.
+
+PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
+      folder from quota calculations, a direct delivery into this folder messed
+      up the contents of the maildirsize file. This was because the regex was
+      used only to exclude .Trash (or whatever) when the size of the mailbox
+      was calculated. There was no check that a delivery was happening into an
+      excluded directory. This bug has been fixed by ignoring all quota
+      processing for deliveries into excluded directories.
+
+PH/10 Added the maildirfolder_create_regex option to appendfile.
+
+
+Exim version 4.61
+-----------------
+
+PH/01 The code for finding all the local interface addresses on a FreeBSD
+      system running IPv6 was broken. This may well have applied to all BSD
+      systems, as well as to others that have similar system calls. The broken
+      code found IPv4 interfaces correctly, but gave incorrect values for the
+      IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
+      that it would not match correctly against @[] and not recognize the IPv6
+      addresses as local.
+
+PH/02 The ipliteral router was not recognizing addresses of the form user@
+      [ipv6:....] because it didn't know about the "ipv6:" prefix.
+
+PH/03 Added disable_ipv6.
+
+PH/04 Changed $reply_address to use the raw form of the headers instead of the
+      decoded form, because it is most often used to construct To: headers
+      lines in autoreplies, and the decoded form may well be syntactically
+      invalid. However, $reply_address has leading white space removed, and all
+      newlines turned into spaces so that the autoreply transport does not
+      grumble.
+
+PH/05 If group was specified without a user on a router, and no group or user
+      was specified on a transport, the group from the router was ignored.
+
+PH/06 Increased the number of ACL variables to 20 of each type, and arranged
+      for visible compile-time settings that can be used to change these
+      numbers, for those that want even more. Backwards compatibility with old
+      spool files has been maintained. However, going back to a previous Exim
+      release will lost any variables that are in spool files.
+
+PH/07 Two small changes when running in the test harness: increase delay when
+      passing a TCP/IP connection to a new process, in case the original
+      process has to generate a bounce, and remove special handling of
+      127.0.0.2 (sic), which is no longer necessary.
+
+PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
+      be the same on different OS.
+
+PH/09 Moved a debug statement in filter processing to avoid a race problem when
+      testing.
+
+JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
+      whether --show-vars was specified or not
+
+JJ/02 exipick: Added support for new ACL variable spool format introduced
+      in 4.61-PH/06
+
+PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
+      syntactically invalid From: or Reply-to: line, and a filter used this to
+      generate an autoreply, and therefore failed to obtain an address for the
+      autoreply, Exim could try to deliver to a non-existent relative file
+      name, causing unrelated and misleading errors. What now happens is that
+      it logs this as a hard delivery error, but does not attempt to create a
+      bounce message.
+
+PH/11 The exinext utility has a -C option for testing purposes, but although
+      the given file was scanned by exinext itself; it wasn't being passed on
+      when Exim was called.
+
+PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
+      an end-of-file indication when reading a command response.
+
+PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
+      compiled. In many other places in Exim, IPv6 addresses are always
+      recognized, so I have changed this. It also means that IPv4 domain
+      literals of the form [IPV4:n.n.n.n] are now always recognized.
+
+PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
+      used if the router is not running as root, for example, when verifying at
+      ACL time, or when using -bh. The debugging output from this situation was
+      non-existent - all you got was a failure to exec. I have made two
+      changes:
+
+      (a) Failures to set uid/gid, the current directory, or a process leader
+          in a subprocess such as that created by queryprogram now generate
+          suitable debugging ouput when -d is set.
+
+      (b) The queryprogram router detects when it is not running as root,
+          outputs suitable debugging information if -d is set, and then runs
+          the subprocess without attempting to change uid/gid.
+
+PH/15 Minor change to Makefile for building test_host (undocumented testing
+      feature).
+
+PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
+      additional section of a DNS packet that returns MX or SRV records.
+      Instead, it always explicitly searches for A/AAAA records. This avoids
+      major problems that occur when a DNS server includes only records of one
+      type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
+      fixed another bug: if SRV records were looked up and the corresponding
+      address records were *not* found in the additional section, the port
+      values from the SRV records were lost.
+
+PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
+      using the correct key (the original address) when searching the retry
+      rules in order to find which one to use for generating the retry hint.
+
+PH/18 If quota_warn_message contains a From: header, Exim now refrains from
+      adding the default one. Similarly, if it contains a Reply-To: header, the
+      errors_reply_to option, if set, is not used.
+
+PH/19 When calculating a retry time, Exim used to measure the "time since
+      failure" by looking at the "first failed" field in the retry record. Now
+      it does not use this if it is later than than the arrival time of the
+      message. Instead it uses the arrival time. This makes for better
+      behaviour in cases where some deliveries succeed, thus re-setting the
+      "first failed" field. An example is a quota failure for a huge message
+      when small messages continue to be delivered. Without this change, the
+      "time since failure" will always be short, possible causing more frequent
+      delivery attempts for the huge message than are intended.
+      [Note: This change was subsequently modified - see PH/04 for 4.62.]
+
+PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
+      $1, $2, $3) because the numerical variables can be reset during some
+      expansion items (e.g. "match"), thereby losing the authentication data.
+
+PH/21 Make -bV show the size of off_t variables so that the test suite can
+      decide whether to run tests for quotas > 2G.
+
+PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
+      mailbox_size, and mailbox_filecount in the appendfile transport. If a
+      filecount value is greater than 2G or if a quota value is greater than 2G
+      on a system where the size of off_t is not greater than 4, a panic error
+      is given.
+
+PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
+      never match. The debug and -bh output now contains an explicit error
+      message indicating a malformed IPv4 address or mask.
+
+PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
+      1.2.3.4 without a mask. Now it is not recognized as an IP address, and
+      PH/23 above applies.
+
+PH/25 Do not write to syslog when running in the test harness. The only
+      occasion when this arises is a failure to open the main or panic logs
+      (for which there is an explicit test).
+
+PH/26 Added the /no_tell option to "control=freeze".
+
+PH/27 If a host name lookup failed very early in a connection, for example, if
+      the IP address matched host_lookup and the reverse lookup yielded a name
+      that did not have a forward lookup, an error message of the form "no IP
+      address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
+      could be logged. Now it outputs the IP address instead of "NULL".
+
+PH/28 An enabling patch from MH: add new function child_open_exim2() which
+      allows the sender and the authenticated sender to be set when
+      submitting a message from within Exim. Since child_open_exim() is
+      documented for local_scan(), the new function should be too.
+
+PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
+      ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
+      results in an empty string is now treated as unset.
+
+PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
+
+PH/31 Added sender_verify_fail logging option.
+
+PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
+      needed by RFC 822 but not by RFC 2822 was commented out. I have now
+      tidied the source and removed it altogether.
+
+PH/33 When a queue run was abandoned because the load average was too high, a
+      log line was always written; now it is written only if the queue_run log
+      selector is set. In addition, the log line for abandonment now contains
+      information about the queue run such as the pid. This is always present
+      in "start" and "stop" lines but was omitted from the "abandon" line.
+
+PH/34 Omit spaces between a header name and the colon in the error message that
+      is given when verify = headers_syntax fails (if there are lots of them,
+      the message gets confusing).
+
+PH/35 Change the default for dns_check_names_pattern to allow slashes within
+      names, as there are now some PTR records that contain slashes. This check
+      is only to protect against broken name servers that fall over on strange
+      characters, so the fact that it applies to all lookups doesn't matter.
+
+PH/36 Now that the new test suite is complete, we can remove some of the
+      special code in Exim that was needed for the old test suite. For example,
+      sorting DNS records because real resolvers return them in an arbitrary
+      order. The new test suite's fake resolver always returns records in the
+      same order.
+
+PH/37 When running in the test harness, use -odi for submitted messages (e.g.
+      bounces) except when queue_only is set, to avoid logging races between
+      the different processes.
+
+PH/38 Panic-die if .include specifies a non-absolute path.
+
+PH/39 A tweak to the "H" retry rule from its user.
+
+JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
+      a label.  They prevented compilation on older perls.
+
+JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
+      a warning to be raised on newish perls.
+
+JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
+      on queue.  Changes to match documented behaviour of showing count of
+      messages matching specified criteria.
+
+PH/40 Changed the default ident timeout from 30s to 5s.
+
+PH/41 Added support for the use of login_cap features, on those BSD systems
+      that have them, for controlling the resources used by pipe deliveries.
+
+PH/42 The content-scanning code uses fopen() to create files in which to put
+      message data. Previously it was not paying any attention to the mode of
+      the files. Exim runs with umask(0) because the rest of the code creates
+      files with open(), and sets the required mode explicitly. Thus, these
+      files were ending up world-writeable. This was not a big issue, because,
+      being within the spool directory, they were not world-accessible. I have
+      created a function called modefopen, which takes an additional mode
+      argument. It sets umask(777), creates the file, chmods it to the required
+      mode, then resets the umask. All the relevant calls to fopen() in the
+      content scanning code have been changed to use this function.
+
+PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
+      to 24 hours. This avoids potential overflow problems when processing G
+      and H retry rules. I suspect nobody ever tinkers with this value.
+
+PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
+
+PH/45 When the plaintext authenticator is running as a client, the server's
+      challenges are checked to ensure they are valid base64 strings. By
+      default, the authentication attempt is cancelled if an invalid string is
+      received. Setting client_ignore_invalid_base64 true ignores these errors.
+      The decoded challenge strings are now placed in $auth1, $auth2, etc. as
+      they are received. Thus, the responses can be made to depend on the
+      challenges. If an invalid string is ignored, an empty string is placed in
+      the variable.
+
+PH/46 Messages that are created by the autoreply transport now contains a
+      References: header, in accordance with RFCs 2822 and 3834.
+
+PH/47 Added authenticated_sender_force to the smtp transport.
+
+PH/48 The ${prvs expansion was broken on systems where time_t was long long.
+
+PH/49 Installed latest patch from the Sieve maintainer.
+
+PH/50 When an Exim quota was set without a file count quota, and mailbox_size
+      was also set, the appendfile transport was unnecessarily scanning a
+      directory of message files (e.g. for maildir delivery) to find the count
+      of files (along with the size), even though it did not need this
+      information. It now does the scan only if it needs to find either the
+      size of the count of files.
+
+PH/51 Added ${time_eval: to convert Exim time strings into seconds.
+
+PH/52 Two bugs concerned with error handling when the smtp transport is
+      used in LMTP mode:
+
+      (i) Exim was not creating retry information for temporary errors given
+      for individual recipients after the DATA command when the smtp transport
+      was used in LMTP mode. This meant that they could be retried too
+      frequently, and not timed out correctly.
+
+      (ii) Exim was setting the flag that allows error details to be returned
+      for LMTP errors on RCPT commands, but not for LMTP errors for individual
+      recipients that were returned after the DATA command.
+
+PH/53 This is related to PH/52, but is more general: for any failing address,
+      when detailed error information was permitted to be returned to the
+      sender, but the error was temporary, then after the final timeout, only
+      "retry timeout exceeded" was returned. Now it returns the full error as
+      well as "retry timeout exceeded".
+
+PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
+      do this, and (what is worse) MTAs that accept it.
+
+PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
+      will now be deprecated.
+
+PH/56 New os.c-cygwin from the Cygwin maintainer.
+
+JJ/06 exipick: added --unsorted option to allow unsorted output in all output
+      formats (previously only available in exim formats via -bpr, -bpru,
+      and -bpra.  Now also available in native and exiqgrep formats)
+
+JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
+      with very large, slow to parse queues
+
+JJ/08 exipick: added ! as generic prefix to negate any criteria format
+
+JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
+
+PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
+      responses to authentication challenges, though it was showing the
+      challenges; (ii) I've removed the CR characters from the debug output for
+      SMTP output lines.
+
+PH/58 Allow for the insertion of a newline as well as a space when a string
+      is turned into more than one encoded-word during RFC 2047 encoding. The
+      Sieve code now uses this.
+
+PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
+      data_4xx, lost_connection, tls_required.
+
+PH/60 When a VRFY deferred or FAILED, the log message rather than the user
+      message was being sent as an SMTP response.
+
+PH/61 Add -l and -k options to exicyclog.
+
+PH/62 When verifying, if an address was redirected to one new address, so that
+      verification continued, and the new address failed or deferred after
+      having set something in $address_data, the value of $address_data was not
+      passed back to the ACL. This was different to the case when no
+      redirection occurred. The value is now passed back in both cases.
+
+PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
+      HAVE_SETCLASSRESOURCES because there are different APIs in use that all
+      use login_cap.h, so on its own it isn't the distinguishing feature. The
+      new name refers directly to the setclassresources() function.
+
+PH/65 Added configuration files for NetBSD3.
+
+PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
+
+PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
+      is preferred over IPv4.
+
+PH/68 The bounce_return_message and bounce_return_body options were not being
+      honoured for bounces generated during the reception of non-SMTP messages.
+      In particular, this applied to messages rejected by the ACL. This bug has
+      been fixed. However, if bounce_return_message is true and bounce_return_
+      body is false, the headers that are returned for a non-SMTP message
+      include only those that have been read before the error was detected.
+      (In the case of an ACL rejection, they have all been read.)
+
+PH/69 The HTML version of the specification is now built in a directory called
+      spec_html instead of spec.html, because the latter looks like a path with
+      a MIME-type, and this confuses some software.
+
+PH/70 Catch two compiler warnings in sieve.c.
+
+PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
+      function verify_get_ident() calls ip_connect() to connect a socket, but
+      if the "connect()" function timed out, ip_connect() used to close the
+      socket. However, verify_get_ident() also closes the socket later, and in
+      between Exim writes to the log, which may get opened at this point. When
+      the socket was closed in ip_connect(), the log could get the same file
+      descriptor number as the socket. This naturally causes chaos. The fix is
+      not to close the socket in ip_connect(); the socket should be closed by
+      the function that creates it. There was only one place in the code where
+      this was missing, in the iplookup router, which I don't think anybody now
+      uses, but I've fixed it anyway.
+
+PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
+      well as to direct DNS lookups. Otherwise the handling of names in host
+      lists is inconsistent and therefore confusing.
+
+
+Exim version 4.60
+-----------------
+
+PH/01 Two changes to the default runtime configuration:
+
+      (1) Move the checks for relay_from_hosts and authenticated clients from
+          after to before the (commented out) DNS black list checks.
+
+      (2) Add control=submission to the relay_from_hosts and authenticated
+          clients checks, on the grounds that messages accepted by these
+          statements are most likely to be submissions.
+
+PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
+
+      (1) Generate an error if the third argument for the ${prvs expansion is
+          not a single digit.
+
+      (2) Treat a missing third argument of ${prvscheck as if it were an empty
+          string.
+
+      (3) Reset the variables that are obtained from the first argument of
+          ${prvscheck and used in the second argument before leaving the code,
+          because their memory is reclaimed, so using them afterwards may do
+          silly things.
+
+      (4) Tidy up the code for expanding the arguments of ${prvscheck one by
+          one (it's much easier than Tom thought :-).
+
+      (5) Because of (4), we can now allow for the use of $prvscheck_result
+          inside the third argument.
+
+PH/03 For some reason, the default setting of PATH when running a command from
+      a pipe transport was just "/usr/bin". I have changed it to
+      "/bin:/usr/bin".
+
+PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
+      anything to be listed in the output from -bV.
+
+PH/05 When a filter generated an autoreply, the entire To: header line was
+      quoted in the delivery log line, like this:
+
+        => >A.N.Other <ano@some.domain> <original@ddress> ...
+
+      This has been changed so that it extracts the operative address. There
+      may be more than one such address. If so, they are comma-separated, like
+      this:
+
+        => >ano@some.domain,ona@other.domain <original@ddress> ...
+
+PH/06 When a client host used a correct literal IP address in a HELO or EHLO
+      command, (for example, EHLO [1.2.3.4]) and the client's IP address was
+      not being looked up in the rDNS to get a host name, Exim was showing the
+      IP address twice in Received: lines, even though the IP addresses were
+      identical. For example:
+
+        Received: from [1.2.3.4] (helo=[1.2.3.4])
+
+      However, if the real host name was known, it was omitting the HELO data
+      if it matched the actual IP address. This has been tidied up so that it
+      doesn't show the same IP address twice.
+
+PH/07 When both +timestamp and +memory debugging was on, the value given by
+      $tod_xxx expansions could be wrong, because the tod_stamp() function was
+      called by the debug printing, thereby overwriting the timestamp buffer.
+      Debugging no longer uses the tod_stamp() function when +timestamp is set.
+
+PH/08 When the original message was included in an autoreply transport, it
+      always said "this is a copy of the message, including all the headers",
+      even if body_only or headers_only was set. It now gives an appropriate
+      message.
+
+PH/09 Applied a patch from the Sieve maintainer which:
+
+      o  fixes some comments
+      o  adds the (disabled) notify extension core
+      o  adds some debug output for the result of if/elsif tests
+      o  points to the current vacation draft in the documentation
+         and documents the missing references header update
+
+      and most important:
+
+      o  fixes a bug in processing the envelope test (when testing
+         multiple envelope elements, the last element determinted the
+         result)
+
+PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
+      Electronic Mail") by including:
+
+        Auto-submitted: auto-generated
+
+      in the messages that it generates (bounce messages and others, such as
+      warnings). In the case of bounce messages for non-SMTP mesages, there was
+      also a typo: it was using "Auto_submitted" (underscore instead of
+      hyphen). Since every message generated by Exim is necessarily in response
+      to another message, thes have all been changed to:
+
+        Auto-Submitted: auto-replied
+
+      in accordance with these statements in the RFC:
+
+        The auto-replied keyword:
+
+        -  SHOULD be used on messages sent in direct response to another
+           message by an automatic process,
+
+        -  MUST NOT be used on manually-generated messages,
+
+        -  MAY be used on Delivery Status Notifications (DSNs) and Message
+           Disposition Notifications (MDNs),
+
+        -  MUST NOT be used on messages generated by automatic or periodic
+           processes, except for messages which are automatic responses to
+           other messages.
+
+PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
+      to the default Received: header definition.
+
+PH/12 Added log selector acl_warn_skipped (default on).
+
+PH/13 After a successful wildlsearch lookup, discard the values of numeric
+      variables because (a) they are in the wrong storage pool and (b) even if
+      they were copied, it wouldn't work properly because of the caching.
+
+PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
+      checking when decoding. Apparently there are clients that generate
+      overlong encoded strings. Why am I not surprised?
+
+PH/15 If the first argument of "${if match_address" was not empty, but did not
+      contain an "@" character, Exim crashed. Now it writes a panic log message
+      and treats the condition as false.
+
+PH/16 In autoreply, treat an empty string for "once" the same as unset.
+
+PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
+      extension "envelope-auth".  The code is finished and in agreement with
+      other implementations, but there is no documentation so far and in fact,
+      nobody wrote the draft yet.  This extension is currently #undef'ed, thus
+      not changing the active code.
+
+      Print executed "if" and "elsif" statements when debugging is used. This
+      helps a great deal to understand what a filter does.
+
+      Document more things not specified clearly in RFC3028.  I had all this
+      sorted out, when out of a sudden new issues came to my mind.  Oops."
+
+PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
+      (Bugzilla #53).
+
+PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
+      canonical form (as documented). However, after a host name lookup from
+      the IP address, check_host() was doing a simple string comparison with
+      addresses acquired from the DNS when checking that the found name did
+      have the original IP as one of its addresses. Since any found IPv6
+      addresses are likely to be in abbreviated form, the comparison could
+      fail. Luckily, there already exists a function for doing the comparison
+      by converting both addresses to binary, so now that is used instead of
+      the text comparison.
+
+PH/20 There was another similar case to PH/19, when a complete host name was
+      given in a host list; looking up its IP address could give an abbreviated
+      form, whereas the current host's name might or might not be abbreviated.
+      The same fix has been applied.
+
+
+Exim version 4.54
+-----------------
+
+PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
+      set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
+      It now does.
+
+PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
+      the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
+
+PH/03 Typo: missing ".o" in src/pcre/Makefile.
+
+PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
+      header line, restrict the check to what is listed in RFCs 2369 and 2929.
+      Also, for "Auto-Submitted", treat anything other than "no" as
+      non-personal, in accordance with RFC 3834. (Previously it treated
+      anything starting "auto-" as non-personal.)
+
+TF/01 The control=submission/name=... option had a problem with syntax
+      errors if the name included a slash character. The /name= option
+      now slurps the rest of the string, so it can include any characters
+      but it must come last in the list of options (after /sender_retain
+      or /domain=).
+
+PH/05 Some modifications to the interface to the fake nameserver for the new
+      testing suite.
+
+
+
 Exim version 4.53
 -----------------
 
@@ -216,6 +1613,14 @@ TF/07 Exim produced the error message "an SRV record indicated no SMTP
       service" if it encountered an MX record with an empty target hostname.
       The message is now "an MX or SRV record indicated no SMTP service".
 
+TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
+      if the DNS of the sending site is misconfigured. This is quite a
+      common situation. This change restores the behaviour of treating a
+      helo verification defer as a failure.
+
+PH/51 If self=fail was set on a router, the bounce message did not include the
+      actual error message.
+
 
 Exim version 4.52
 -----------------