[Postfix espanol] Postfix version 1.1.0 available

[Wietse Venema]

Postfix version 1.1.0 is available. This is the second official
non-beta Postfix release. See below for a summary from the
RELEASE_NOTES file.

This is the same code as snapshot 20020115 with cosmetic changes.
The next snapshot will be called Postfix version 1.1.0-yyyymmdd,
where yyyymmdd is the snapshot release date. No snapshot release
is planned yet. At least not for the next couple weeks.

Available from ftp://ftp.porcupine.org/mirrors/postfix-release/official/

     206254 Jan 17 12:58 postfix-1.1.0.HISTORY		Change log
      50021 Jan 17 14:14 postfix-1.1.0.RELEASE_NOTES	Compatibility, features
    1172184 Jan 17 14:16 postfix-1.1.0.tar.gz		Source code
	152 Jan 17 14:16 postfix-1.1.0.tar.gz.sig	PGP signature

And soon to appear on the mirror sites listed on www.postfix.org.

This code is the result of three months of cleaning up. May it be
a basis for further evolution. There still is a lot of work to do.

Happy Postfixing!

	Wietse

In the text below, incompatible changes are labeled with the Postfix
snapshot that introduced the change. If you upgrade from a later
Postfix version, then you do not have to worry about that particular
incompatibility.

Official Postfix releases are called a.b.c where a=major release
number, b=minor release number, c=patchlevel.  Snapshot releases
are now called a.b.c-yyyymmdd where yyyymmdd is the release date
(yyyy=year, mm=month, dd=day).  The mail_release_date configuration
parameter contains the release date.  Patches change the patchlevel
and the release date. Snapshots change only the release date, unless
they include the same bugfix as a patch release.

Incompatible changes with Postfix version 1.1.0 (released 20020117)
===================================================================

Changes are listed in order of decreasing importance, not release
date.

[snapshot-20010709] This release introduces a new queue file record
type that is used only for messages that actually use VERP (variable
envelope return path) support.  With this sole exception, the queue
file format is entirely backwards compatible with the previous
official Postfix release (20020228, a.k.a. Postfix 1.1.0).

[snapshot-20020106] This release modifies the existing master.cf
file. The local pickup service is now unprivileged, and the cleanup
and flush service are now "public". Should you have to back out to
a previous release, then you must 1) edit the master.cf file, make
the pickup service "privileged", and make the cleanup and flush
services "private"; 2) "chmod 755 /var/spool/postfix/public".  To
revert to a world-writable mail submission directory, "chmod 1733
/var/spool/postfix/maildrop".

[snapshot-20020106, snapshot-20010808, snapshot-20011103,
snapshot-20011121] You must stop and restart Postfix because of
incompatible changes in the local Postfix security model and in
the Postfix internal protocols. Old and new components will not
work together.

[snapshot-20020106] Simpler local Postfix security model.

- No world-writable maildrop directory. Postfix now always uses
  the set-gid postdrop command for local mail submissions.  The
  local mail pickup daemon is now an unprivileged process.

- No world-accessible pickup and queue manager server FIFOs.

- New set-gid postqueue command for the queue list/flush operations
  that used to implemented by the Postfix sendmail command.

[snapshot-20020106..15] Simpler Postfix installation and upgrading.

- All installation settings are now kept in the main.cf file, and
  better default settings are now generated for system dependent
  pathnames such as sendmail_path etc. The install.cf file is no
  longer used, except when upgrading from an older Postfix version.

- Non-default installation parameter settings can (but do not have
  to) be specified on the "make install" or "make upgrade" command
  line as name=value arguments.

- New postfix-files database (in /etc/postfix) with (pathname,
  owner, permission) information about all Postfix-related files.

- New postfix-install script replaces the awkward INSTALL.sh script.
  This is driven by the postfix-files database. It has better
  support for building packages for distribution to other systems.
  See PACKAGE_README for details.

- New post-install script (in /etc/postfix) for post-installation
  maintenance of directory/file permissions and ownership (this is
  used by "postfix check"). Example:

    # postfix stop
    # post-install set-permissions mail_owner=username setgid_group=groupname
    # postfix start

[snapshot-20020106] Postfix will not run if it detects that the
postfix user or group ID are shared with other accounts on the
system. The checks aren't exhaustive (that would be too resource
consuming) but should be sufficient to encourage packagers and
developers to do the right thing. To fix the problem, use the above
post-install command, after you have created the appropriate new
mail_owner or setgid_group user or group IDs.

[snapshot-20020106] If you run multiple Postfix instances on the
same machine you now have to specify their configuration directories
in the default main.cf file as "alternate_config_directories =
/dir1 /dir2 ...".  Otherwise, some Postfix commands will no longer
work: the set-group ID postdrop command for mail submission and
the set-group ID postqueue command for queue listing/flushing.

[snapshot-20010808] The default setting for the maps_rbl_domains
parameter is now "empty", because mail-abuse.org has become a
subscription-based service. The names of the RBL parameters haven't
changed.

[snapshot-20020106] Postfix SMTP access maps will no longer return
OK for non-local multi-domain recipient mail addresses (user en dom1@dom2,
user%dom1 en dom2, etcetera); the lookup now returns DUNNO (undetermined).
Non-local multi-domain recipient addresses were already prohibited
from matching the permit_mx_backup and the relay_domains-based
restrictions.

[snapshot-20011210] Stricter checking of Postfix chroot configurations.
The Postfix startup procedure now warns if "system" directories
(etc, bin, lib, usr) under the Postfix top-level queue directory
are not owned by the super-user (usually the result of well-intended,
but misguided, applications of "chown -R postfix /var/spool/postfix).

[snapshot-20011008] The Postfix SMTP server now rejects requests
with a generic "try again later" status (451 Server configuration
error) when it detects an error in smtp_{client, helo, sender,
recipient, etrn}_restrictions settings.  More details about the
problem are logged to the syslogd; sending such information to
random clients would be inappropriate.

[snapshot-20011008] Postfix no longer flushes the entire mail queue
after receiving an ETRN request for a random domain name. Requests
for domains that do not match $fast_flush_domains are now rejected
instead.

[snapshot-20011226] Postfix configuration file comments no longer
continue on the next line when that next line starts with whitespace.
This change avoids surprises, but it may cause unexpected behavior
with existing, improperly formatted, configuration files. Caveat
user. Comment lines are allowed to begin with whitespace. Multi-line
input is no longer terminated by a comment line, by an all whitespace
line, or by an empty line.

[snapshot-20010714] Postfix delivery agents now refuse to create
a missing maildir or mail spool subdirectory when its parent
directory is world writable.  This is necessary to prevent security
problems with maildirs or with hashed mailboxes under a world
writable mail spool directory.

[snapshot-20010525] As per RFC 2821, the Postfix SMTP client now
always sends EHLO at the beginning of an SMTP session. Specify
"smtp_always_send_ehlo = no" for the old behavior, which is to send
EHLO only when the server greeting banner contains the word ESMTP.

[snapshot-20010525] As per RFC 2821, an EHLO command in the middle
of an SMTP session resets the Postfix SMTP server state just like
RSET. This behavior cannot be disabled.

[snapshot-20010709] The SMTP client now by default breaks lines >
2048 characters, to avoid mail delivery problems with fragile SMTP
server software.  To get the old behavior back, specify "smtp_break_lines
= no" in the Postfix main.cf file.

[snapshot-20010709] With recipient_delimiter=+ (or any character
other than -) Postfix will now recognize address extensions even
with owner-foo+extension addresses. This change was necessary to
make VERP useful for mailing list bounce processing.

[snapshot-20010610] The Postfix pipe delivery agent no longer
automatically case-folds the expansion of $user, $extension or
$mailbox command-line macros.  Specify the 'u' flag to get the old
behavior.

[snapshot-20011210] The Postfix sendmail command no longer exits
with status 1 when mail submission fails, but instead returns a
sendmail-compatible status code as defined in /usr/include/sysexits.h.

Major changes with Postfix version 1.1.0 (Released 20020117)
============================================================

Changes are listed in order of decreasing importance, not release
date.

The nqmgr queue manager is now bundled with Postfix. It implements
a smarter scheduling strategy that allows ordinary mail to slip
past mailing list mail, resulting in better response. This queue
manager is expected to become the default queue manager shortly.

[snapshot-20010709, snapshot-20010808] VERP (variable envelope
return path) support.  This is enabled by default, including in
the SMTP server. See the VERP_README file for instructions.  Specify
"disable_verp_bounces = yes" to have Postfix send one RFC-standard,
non-VERP, bounce report for multi-recipient mail, even when VERP
style delivery was requested.  This reduces the explosive behavior
of bounces when sending mail to a list.

[snapshot-20010709] QMQP server support, so that Postfix can be
used as a backend mailer for the ezmlm-idx mailing list manager.
You still need qmail to drive ezmlm and to process mailing list
bounces. The QMQP service is disabled by default. To enable, follow
the instructions in the QMQP_README file.

[snapshot-20010709] You can now reject unknown virtual(8) recipients
at the SMTP port by specifying a "domain.name whatever" entry in
the tables specified with virtual_mailbox_maps, similar to Postfix
virtual(5) domains.  [virtual(8) is the Postfix virtual delivery
agent, virtual(5) is the Postfix virtual map. The two implement
virtual domains in a very different manner.]

[snapshot-20011121] Configurable host/domain name wildcard matching
behavior: choice between "pattern `domain.name' matches string
`host.domain.name'" (this is to be deprecated in the future) and
"pattern `.domain.name' matches string `host.domain.name'" (this
is to be preferred in the future).  The configuration parameter
"parent_domain_matches_subdomains" specifies which Postfix features
use the behavior that will become deprecated.

[snapshot-20010808] Variable coupling between message receiving
rates and message delivery rates. When the message receiving rate
exceeds the message delivery rate, an SMTP server will pause for
$in_flow_delay seconds before accepting a message.  This delay
gives Postfix a chance catch up and access the disk, while still
allowing new mail to arrive.  This feature currently has effect
only when mail arrives via a small number of SMTP clients.

[snapshot-20010610, snapshot-20011121, snapshot-20011210] Workarounds
for a bug in old versions of the CISCO PIX firewall software that
caused mail to be resent repeatedly.  The workaround has no effect
for other mail deliveries. The workaround is turned off when mail
is queued for less than $smtp_pix_workaround_threshold_time seconds
(default:  500 seconds) so that the workaround is normally enabled
only for deferred mail.  The delay before sending .<CR><LF> is now
controlled by the $smtp_pix_workaround_delay_time setting (default:
10 seconds).

[snapshot-20011226] Postfix will now do null address lookups in
SMTPD access maps.  If your access maps cannot store or look up
null string key values, specify "smtpd_null_access_lookup_key =
<>" and the null sender address will be looked up as <> instead.

[snapshot-20011210] More usable virtual delivery agent, thanks to
a new "static" map type by Jeff Miller that always returns its map
name as the lookup result. This eliminates the need for per-recipient
user ID and group ID tables.  See the VIRTUAL_README file for more
details.

[snapshot-20011125] Anti-sender spoofing. New main.cf parameter
smtpd_sender_login_maps that specifies the (SASL) login name that
owns a MAIL FROM sender address.  Specify a regexp table in order
to require a simple one-to-one mapping.  New SMTPD restriction
reject_sender_login_mismatch that refuses a MAIL FROM address when
$smtpd_sender_login_maps specifies an owner but the client is not
(SASL) logged in as the MAIL FROM address owner, or when a client
is (SASL) logged in but does not own the address according to
$smtpd_sender_login_maps.

[snapshot-20011121] The mailbox_command_maps parameter allows you
to configure the external delivery command per user (local delivery
agent only).  This feature has precedence over the mailbox_command
and home_mailbox settings.

[snapshot-20011121] New "warn_if_reject" smtpd UCE restriction that
only warns if the restriction that follows would reject mail.  Look
for file records that contain the string "reject_warning".

[snapshot-20011127] New header/body_check result "WARN" to make
Postfix log a warning about a header/body line without rejecting
the content.

[snapshot-20011103] In header/body_check files, REJECT can now be
followed by text that is sent to the originator. That feature was
stuck waiting for years, pending the internal protocol revision.

[snapshot-20011008] The permit_mx_backup feature allows you to
specify network address blocks via the permit_mx_backup_networks
parameter.  This requires that the primary MX hosts for the given
destination match the specified network blocks. When no value is
given for permit_mx_backup_networks, Postfix will accept mail
whenever the local MTA is listed in the DNS as an MX relay host
for a destination, even when you never gave permission to do so.

[snapshot-20010709] Specify "mail_spool_directory = /var/mail/"
(note the trailing "/" character) to enable maildir format for
/var/mail/username.

[snapshot-20010808] Finer control over address masquerading. The
masquerade_classes parameter now controls header and envelope sender
and recipient addresses.  With earlier Postfix versions, address
masquerading rewrote all addresses except for the envelope recipient.

[snapshot-20010610] The pipe mail delivery agent now supports proper
quoting of white space and other special characters in the expansions
of the $sender and $recipient command-line macros. This was necessary
for correct operation of the "simple" content filter, and is also
recommended for delivery via UUCP or BSMTP.

[snapshot-20010610] The pipe mail delivery agent now supports case
folding the localpart and/or domain part of expansions of the
$nexthop, $recipient, $user, $extension or $mailbox command-line
macros. This is recommended for mail delivery via UUCP. Bug: $nexthop
is always case folded because of problems in the queue manager
code.

[snapshot-20010525] This release contains many little revisions of
little details in the light of the new RFC 2821 and RFC 2822
standards. Changes that may affect interoperability are listed
above under "incompatible changes".  Other little details are
discussed in comments in the source code.

[snapshot-20010502] The Postfix SMTP client now by default randomly
shuffles destination IP addresses of equal preference (whether
obtained via MX lookup or otherwise). Reportedly, this is needed
for sites that use Bernstein's dnscache program. Specify
"smtp_randomize_addresses = no" to disable this behavior. Based on
shuffling code by Aleph1.

[snapshot-20011127] New parameter smtpd_noop_commands to specify
a list of commands that the Postfix SMTP server treats as NOOP
commands (no syntax check, no state change). This is a workaround
for misbehaving clients that send unsupported commands such as
ONEX.

[snapshot-20010502] "postmap -q -" and "postmap -d -" read key
values from standard input, which makes it easier to drive them
from another program.  The same feature was added to the postalias
command.

[snapshot-20010502] The postsuper command now has a command-line
option to delete queue files.  In principle this command can be
used while Postfix is running, but there is a possibility of deleting
the wrong queue file when Postfix deletes a queue file and reuses
the queue ID for a new message.  In that case, postsuper will delete
the new message.

[snapshot-20010525] The postsuper queue maintenance tool now renames
files whose name (queue ID) does not match the message file inode
number. This is necessary after a Postfix mail queue is restored
from another machine or from backups.  The feature is selected with
the -s option, which is the default, and runs whenever Postfix is
started.

[snapshot-20010525] The postsuper queue maintenance tool has a new
-r (requeue) option for subjecting some or all queue files to
another iteration of address rewriting. This is useful after the
virtual or canonical maps have changed.

[snapshot-20010525] The postsuper queue maintenance tool was extended
with options to read queue IDs from standard input. This makes the
tool easier to drive from scripts.

[snapshot-20010329] Better support for running multiple Postfix
instances on one machine. Each instance can be recognized by its
logging (defaults:  "syslog_name = postfix", "syslog_facility =
mail").

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