[bglug] Postfix

[CRAZYBYTES computer - Luciano]

Questi sono i link che ho usato io per imparare POSTFIX... ora lo conosco
abbastanza bene... buona lettura:

http://www.mrshark.it/qechowto/configurazionepostfix.html


http://www.pluto.linux.it/journal/pj0201/postfix.html#config

e infine molto utile e ben fatto:

http://www.freebsdforums.org/forums/showthread.php?threadid=1003


CIAO
Luciano
----- Original Message -----
From: "dario" <heavytux@lycos.co.uk>
To: <bglug@lists.linux.it>
Sent: Saturday, November 01, 2003 11:42 AM
Subject: [bglug] Postfix


> Buongiorno lista!
> Dato che in questi 2 mesi di permanenza nella mailing list sono stato un
> pò passivo, riattivo la circolazione delle dita con questo quesito:
> potete consigliarmi un buon documento di facile comprensione riguardo
> alla configurazione di Postfix? Io ci ho provato a farlo andare, ma
> Postfix si comporta in modo strano: il mio client di posta (Mozilla
> Messenger), dice che la mail è stata inviata, ma nella realtà dei fatti
> quest'ultima non giunge mai a destinazione. Il comando postfix check non
> mi da nessun output di errore, quindi il problema non risiede nella
> sintassi, ma sicuramente in qualche erroraccio stupido che ho fatto!
> Allego il file di configurazione main.cf, sicuramente troverete un sacco
> di errori...
>
> A presto
>
>         Dario
>


----------------------------------------------------------------------------
----


> # Global Postfix configuration file. This file lists only a subset
> # of all 250+ parameters. See the sample-xxx.cf files for a full list.
> #
> # The general format is lines with parameter = value pairs. Lines
> # that begin with whitespace continue the previous line. A value can
> # contain references to other $names or ${name}s.
> #
> # NOTE - CHANGE NO MORE THAN 2-3 PARAMETERS AT A TIME, AND TEST IF
> # POSTFIX STILL WORKS AFTER EVERY CHANGE.
>
> # SOFT BOUNCE
> #
> # The soft_bounce parameter provides a limited safety net for
> # testing.  When soft_bounce is enabled, mail will remain queued that
> # would otherwise bounce. This parameter disables locally-generated
> # bounces, and prevents the SMTP server from rejecting mail permanently
> # (by changing 5xx replies into 4xx replies). However, soft_bounce
> # is no cure for address rewriting mistakes or mail routing mistakes.
> #
> #soft_bounce = no
>
> # LOCAL PATHNAME INFORMATION
> #
> # The queue_directory specifies the location of the Postfix queue.
> # This is also the root directory of Postfix daemons that run chrooted.
> # See the files in examples/chroot-setup for setting up Postfix chroot
> # environments on different UNIX systems.
> #
>
> # The command_directory parameter specifies the location of all
> # postXXX commands.
> #
> command_directory = /usr/sbin
>
> # The daemon_directory parameter specifies the location of all Postfix
> # daemon programs (i.e. programs listed in the master.cf file). This
> # directory must be owned by root.
> #
> daemon_directory = /usr/lib/postfix
>
> # QUEUE AND PROCESS OWNERSHIP
> #
> # The mail_owner parameter specifies the owner of the Postfix queue
> # and of most Postfix daemon processes.  Specify the name of a user
> # account THAT DOES NOT SHARE ITS USER OR GROUP ID WITH OTHER ACCOUNTS
> # AND THAT OWNS NO OTHER FILES OR PROCESSES ON THE SYSTEM.  In
> # particular, don't specify nobody or daemon. PLEASE USE A DEDICATED
> # USER.
> #
>
> # The default_privs parameter specifies the default rights used by
> # the local delivery agent for delivery to external file or command.
> # These rights are used in the absence of a recipient user context.
> # DO NOT SPECIFY A PRIVILEGED USER OR THE POSTFIX OWNER.
> #
> #default_privs = nobody
>
> # INTERNET HOST AND DOMAIN NAMES
> #
> # The myhostname parameter specifies the internet hostname of this
> # mail system. The default is to use the fully-qualified domain name
> # from gethostname(). $myhostname is used as a default value for many
> # other configuration parameters.
> #
> myhostname = localhost
> #myhostname = virtual.domain.tld
>
> # The mydomain parameter specifies the local internet domain name.
> # The default is to use $myhostname minus the first component.
> # $mydomain is used as a default value for many other configuration
> # parameters.
> #
> #mydomain = domain.tld
>
> # SENDING MAIL
> #
> # The myorigin parameter specifies the domain that locally-posted
> # mail appears to come from. The default is to append $myhostname,
> # which is fine for small sites.  If you run a domain with multiple
> # machines, you should (1) change this to $mydomain and (2) set up
> # a domain-wide alias database that aliases each user to
> # user@that.users.mailhost.
> #
> # For the sake of consistency between sender and recipient addresses,
> # myorigin also specifies the default domain name that is appended
> # to recipient addresses that have no @domain part.
> #
> #myorigin = $myhostname
> #myorigin = $mydomain
>
> # RECEIVING MAIL
>
> # The inet_interfaces parameter specifies the network interface
> # addresses that this mail system receives mail on.  By default,
> # the software claims all active interfaces on the machine. The
> # parameter also controls delivery of mail to user@[ip.address].
> #
> # See also the proxy_interfaces parameter, for network addresses that
> # are forwarded to us via a proxy or network address translator.
> #
> # Note: you need to stop/start Postfix when this parameter changes.
> #
> #inet_interfaces = localhost
> #inet_interfaces = all
> #inet_interfaces = $myhostname
> inet_interfaces = $myhostname, localhost
>
> # The proxy_interfaces parameter specifies the network interface
> # addresses that this mail system receives mail on by way of a
> # proxy or network address translation unit. This setting extends
> # the address list specified with the inet_interfaces parameter.
> #
> # You must specify your proxy/NAT addresses when your system is a
> # backup MX host for other domains, otherwise mail delivery loops
> # will happen when the primary MX host is down.
> #
> #proxy_interfaces =
> #proxy_interfaces = 1.2.3.4
>
> # The mydestination parameter specifies the list of domains that this
> # machine considers itself the final destination for.
> #
> # These domains are routed to the delivery agent specified with the
> # local_transport parameter setting. By default, that is the UNIX
> # compatible delivery agent that lookups all recipients in /etc/passwd
> # and /etc/aliases or their equivalent.
> #
> # The default is $myhostname + localhost.$mydomain.  On a mail domain
> # gateway, you should also include $mydomain.
> #
> # Do not specify the names of virtual domains - those domains are
> # specified elsewhere (see sample-virtual.cf).
> #
> # Do not specify the names of domains that this machine is backup MX
> # host for. Specify those names via the relay_domains settings for
> # the SMTP server, or use permit_mx_backup if you are lazy (see
> # sample-smtpd.cf).
> #
> # The local machine is always the final destination for mail addressed
> # to user@[the.net.work.address] of an interface that the mail system
> # receives mail on (see the inet_interfaces parameter).
> #
> # Specify a list of host or domain names, /file/name or type:table
> # patterns, separated by commas and/or whitespace. A /file/name
> # pattern is replaced by its contents; a type:table is matched when
> # a name matches a lookup key (the right-hand side is ignored).
> # Continue long lines by starting the next line with whitespace.
> #
> # See also below, section "REJECTING MAIL FOR UNKNOWN LOCAL USERS".
> #
> mydestination = $myhostname
> #mydestination = $myhostname, localhost.$mydomain, $mydomain,
> # mail.$mydomain, www.$mydomain, ftp.$mydomain
>
> # REJECTING MAIL FOR UNKNOWN LOCAL USERS
> #
> # The local_recipient_maps parameter specifies optional lookup tables
> # with all names or addresses of users that are local with respect
> # to $mydestination and $inet_interfaces.
> #
> # If this parameter is defined, then the SMTP server will reject
> # mail for unknown local users. This parameter is defined by default.
> #
> # To turn off local recipient checking in the SMTP server, specify
> # local_recipient_maps = (i.e. empty).
> #
> # The default setting assumes that you use the default Postfix local
> # delivery agent for local delivery. You need to update the
> # local_recipient_maps setting if:
> #
> # - You define $mydestination domain recipients in files other than
> #   /etc/passwd, /etc/aliases, or the $virtual_alias_maps files.
> #   For example, you define $mydestination domain recipients in
> #   the $virtual_mailbox_maps files.
> #
> # - You redefine the local delivery agent in master.cf.
> #
> # - You redefine the "local_transport" setting in main.cf.
> #
> # - You use the "luser_relay", "mailbox_transport", or
"fallback_transport"
> #   feature of the Postfix local delivery agent (see sample-local.cf).
> #
> # Details are described in the LOCAL_RECIPIENT_README file.
> #
> # Beware: if the Postfix SMTP server runs chrooted, you probably have
> # to access the passwd file via the proxymap service, in order to
> # overcome chroot restrictions. The alternative, having a copy of
> # the system passwd file in the chroot jail is just not practical.
> #
> # The right-hand side of the lookup tables is conveniently ignored.
> # In the left-hand side, specify a bare username, an @domain.tld
> # wild-card, or specify a user@domain.tld address.
> #
> #local_recipient_maps = unix:passwd.byname $alias_maps
> #local_recipient_maps = proxy:unix:passwd.byname $alias_maps
> #local_recipient_maps =
>
> # The unknown_local_recipient_reject_code specifies the SMTP server
> # response code when a recipient domain matches $mydestination or
> # $inet_interfaces, while $local_recipient_maps is non-empty and the
> # recipient address or address local-part is not found.
> #
> # The default setting is 550 (reject mail) but it is safer to start
> # with 450 (try again later) until you are certain that your
> # local_recipient_maps settings are OK.
> #
> #unknown_local_recipient_reject_code = 550
> unknown_local_recipient_reject_code = 450
>
> # TRUST AND RELAY CONTROL
>
> # The mynetworks parameter specifies the list of "trusted" SMTP
> # clients that have more privileges than "strangers".
> #
> # In particular, "trusted" SMTP clients are allowed to relay mail
> # through Postfix.  See the smtpd_recipient_restrictions parameter
> # in file sample-smtpd.cf.
> #
> # You can specify the list of "trusted" network addresses by hand
> # or you can let Postfix do it for you (which is the default).
> #
> # By default (mynetworks_style = subnet), Postfix "trusts" SMTP
> # clients in the same IP subnetworks as the local machine.
> # On Linux, this does works correctly only with interfaces specified
> # with the "ifconfig" command.
> #
> # Specify "mynetworks_style = class" when Postfix should "trust" SMTP
> # clients in the same IP class A/B/C networks as the local machine.
> # Don't do this with a dialup site - it would cause Postfix to "trust"
> # your entire provider's network.  Instead, specify an explicit
> # mynetworks list by hand, as described below.
> #
> # Specify "mynetworks_style = host" when Postfix should "trust"
> # only the local machine.
> #
> #mynetworks_style = class
> #mynetworks_style = subnet
> #mynetworks_style = host
>
> # Alternatively, you can specify the mynetworks list by hand, in
> # which case Postfix ignores the mynetworks_style setting.
> #
> # Specify an explicit list of network/netmask patterns, where the
> # mask specifies the number of bits in the network part of a host
> # address.
> #
> # You can also specify the absolute pathname of a pattern file instead
> # of listing the patterns here. Specify type:table for table-based lookups
> # (the value on the table right-hand side is not used).
> #
> mynetworks = 127.0.0.1
> #mynetworks = $config_directory/mynetworks
> #mynetworks = hash:/etc/postfix/network_table
>
> # The relay_domains parameter restricts what destinations this system will
> # relay mail to.  See the smtpd_recipient_restrictions restriction in the
> # file sample-smtpd.cf for detailed information.
> #
> # By default, Postfix relays mail
> # - from "trusted" clients (IP address matches $mynetworks) to any
destination,
> # - from "untrusted" clients to destinations that match $relay_domains or
> #   subdomains thereof, except addresses with sender-specified routing.
> # The default relay_domains value is $mydestination.
> #
> # In addition to the above, the Postfix SMTP server by default accepts
mail
> # that Postfix is final destination for:
> # - destinations that match $inet_interfaces,
> # - destinations that match $mydestination
> # - destinations that match $virtual_alias_domains,
> # - destinations that match $virtual_mailbox_domains.
> # These destinations do not need to be listed in $relay_domains.
> #
> # Specify a list of hosts or domains, /file/name patterns or type:name
> # lookup tables, separated by commas and/or whitespace.  Continue
> # long lines by starting the next line with whitespace. A file name
> # is replaced by its contents; a type:name table is matched when a
> # (parent) domain appears as lookup key.
> #
> # NOTE: Postfix will not automatically forward mail for domains that
> # list this system as their primary or backup MX host. See the
> # permit_mx_backup restriction in the file sample-smtpd.cf.
> #
> #relay_domains = $mydestination
>
> # INTERNET OR INTRANET
>
> # The relayhost parameter specifies the default host to send mail to
> # when no entry is matched in the optional transport(5) table. When
> # no relayhost is given, mail is routed directly to the destination.
> #
> # On an intranet, specify the organizational domain name. If your
> # internal DNS uses no MX records, specify the name of the intranet
> # gateway host instead.
> #
> # In the case of SMTP, specify a domain, host, host:port, [host]:port,
> # [address] or [address]:port; the form [host] turns off MX lookups.
> #
> # If you're connected via UUCP, see also the default_transport parameter.
> #
> #relayhost = $mydomain
> #relayhost = gateway.my.domain
> #relayhost = uucphost
> #relayhost = [an.ip.add.ress]
>
> # REJECTING UNKNOWN RELAY USERS
> #
> # The relay_recipient_maps parameter specifies optional lookup tables
> # with all addresses in the domains that match $relay_domains.
> #
> # If this parameter is defined, then the SMTP server will reject
> # mail for unknown relay users. This feature is off by default.
> #
> # The right-hand side of the lookup tables is conveniently ignored.
> # In the left-hand side, specify an @domain.tld wild-card, or specify
> # a user@domain.tld address.
> #
> #relay_recipient_maps = hash:/etc/postfix/relay_recipients
>
> # INPUT RATE CONTROL
> #
> # The in_flow_delay configuration parameter implements mail input
> # flow control. This feature is turned on by default, although it
> # still needs further development (it's disabled on SCO UNIX due
> # to an SCO bug).
> #
> # A Postfix process will pause for $in_flow_delay seconds before
> # accepting a new message, when the message arrival rate exceeds the
> # message delivery rate. With the default 50 SMTP server process
> # limit, this limits the mail inflow to 50 messages a second more
> # than the number of messages delivered per second.
> #
> # Specify 0 to disable the feature. Valid delays are 0..10.
> #
> #in_flow_delay = 1s
>
> # ADDRESS REWRITING
> #
> # Insert text from sample-rewrite.cf if you need to do address
> # masquerading.
> #
> # Insert text from sample-canonical.cf if you need to do address
> # rewriting, or if you need username->Firstname.Lastname mapping.
>
> # ADDRESS REDIRECTION (VIRTUAL DOMAIN)
> #
> # Insert text from sample-virtual.cf if you need virtual domain support.
>
> # "USER HAS MOVED" BOUNCE MESSAGES
> #
> # Insert text from sample-relocated.cf if you need "user has moved"
> # style bounce messages. Alternatively, you can bounce recipients
> # with an SMTP server access table. See sample-smtpd.cf.
>
> # TRANSPORT MAP
> #
> # Insert text from sample-transport.cf if you need explicit routing.
>
> # ALIAS DATABASE
> #
> # The alias_maps parameter specifies the list of alias databases used
> # by the local delivery agent. The default list is system dependent.
> #
> # On systems with NIS, the default is to search the local alias
> # database, then the NIS alias database. See aliases(5) for syntax
> # details.
> #
> # If you change the alias database, run "postalias /etc/aliases" (or
> # wherever your system stores the mail alias file), or simply run
> # "newaliases" to build the necessary DBM or DB file.
> #
> # It will take a minute or so before changes become visible.  Use
> # "postfix reload" to eliminate the delay.
> #
> #alias_maps = dbm:/etc/aliases
> alias_maps = hash:/etc/postfix/aliases
> #alias_maps = hash:/etc/aliases, nis:mail.aliases
> #alias_maps = netinfo:/aliases
>
> # The alias_database parameter specifies the alias database(s) that
> # are built with "newaliases" or "sendmail -bi".  This is a separate
> # configuration parameter, because alias_maps (see above) may specify
> # tables that are not necessarily all under control by Postfix.
> #
> #alias_database = dbm:/etc/aliases
> #alias_database = dbm:/etc/mail/aliases
> alias_database = hash:/etc/postfix/aliases
> #alias_database = hash:/etc/aliases, hash:/opt/majordomo/aliases
>
> # ADDRESS EXTENSIONS (e.g., user+foo)
> #
> # The recipient_delimiter parameter specifies the separator between
> # user names and address extensions (user+foo). See canonical(5),
> # local(8), relocated(5) and virtual(5) for the effects this has on
> # aliases, canonical, virtual, relocated and .forward file lookups.
> # Basically, the software tries user+foo and .forward+foo before
> # trying user and .forward.
> #
> #recipient_delimiter = +
>
> # DELIVERY TO MAILBOX
> #
> # The home_mailbox parameter specifies the optional pathname of a
> # mailbox file relative to a user's home directory. The default
> # mailbox file is /var/spool/mail/user or /var/mail/user.  Specify
> # "Maildir/" for qmail-style delivery (the / is required).
> #
> #home_mailbox = Mailbox
> #home_mailbox = Maildir/
>
> # The mail_spool_directory parameter specifies the directory where
> # UNIX-style mailboxes are kept. The default setting depends on the
> # system type.
> #
> #mail_spool_directory = /var/mail
> mail_spool_directory = /var/spool/mail
>
> # The mailbox_command parameter specifies the optional external
> # command to use instead of mailbox delivery. The command is run as
> # the recipient with proper HOME, SHELL and LOGNAME environment settings.
> # Exception:  delivery for root is done as $default_user.
> #
> # Other environment variables of interest: USER (recipient username),
> # EXTENSION (address extension), DOMAIN (domain part of address),
> # and LOCAL (the address localpart).
> #
> # Unlike other Postfix configuration parameters, the mailbox_command
> # parameter is not subjected to $parameter substitutions. This is to
> # make it easier to specify shell syntax (see example below).
> #
> # Avoid shell meta characters because they will force Postfix to run
> # an expensive shell process. Procmail alone is expensive enough.
> #
> # IF YOU USE THIS TO DELIVER MAIL SYSTEM-WIDE, YOU MUST SET UP AN
> # ALIAS THAT FORWARDS MAIL FOR ROOT TO A REAL USER.
> #
> #mailbox_command = /some/where/procmail
> #mailbox_command = /some/where/procmail -a "$EXTENSION"
> mailbox_command = /usr/bin/procmail -Y -a $DOMAIN
>
> # The mailbox_transport specifies the optional transport in master.cf
> # to use after processing aliases and .forward files. This parameter
> # has precedence over the mailbox_command, fallback_transport and
> # luser_relay parameters.
> #
> # Specify a string of the form transport:nexthop, where transport is
> # the name of a mail delivery transport defined in master.cf.  The
> # :nexthop part is optional. For more details see the sample transport
> # configuration file.
> #
> # NOTE: if you use this feature for accounts not in the UNIX password
> # file, then you must update the "local_recipient_maps" setting in
> # the main.cf file, otherwise the SMTP server will reject mail for
> # non-UNIX accounts with "User unknown in local recipient table".
> #
> #mailbox_transport = lmtp:unix:/file/name
> #mailbox_transport = cyrus
>
> # The fallback_transport specifies the optional transport in master.cf
> # to use for recipients that are not found in the UNIX passwd database.
> # This parameter has precedence over the luser_relay parameter.
> #
> # Specify a string of the form transport:nexthop, where transport is
> # the name of a mail delivery transport defined in master.cf.  The
> # :nexthop part is optional. For more details see the sample transport
> # configuration file.
> #
> # NOTE: if you use this feature for accounts not in the UNIX password
> # file, then you must update the "local_recipient_maps" setting in
> # the main.cf file, otherwise the SMTP server will reject mail for
> # non-UNIX accounts with "User unknown in local recipient table".
> #
> #fallback_transport = lmtp:unix:/file/name
> #fallback_transport = cyrus
> #fallback_transport =
>
> # The luser_relay parameter specifies an optional destination address
> # for unknown recipients.  By default, mail for unknown@$mydestination
> # and unknown@[$inet_interfaces] is returned as undeliverable.
> #
> # The following expansions are done on luser_relay: $user (recipient
> # username), $shell (recipient shell), $home (recipient home directory),
> # $recipient (full recipient address), $extension (recipient address
> # extension), $domain (recipient domain), $local (entire recipient
> # localpart), $recipient_delimiter. Specify ${name?value} or
> # ${name:value} to expand value only when $name does (does not) exist.
> #
> # luser_relay works only for the default Postfix local delivery agent.
> #
> # NOTE: if you use this feature for accounts not in the UNIX password
> # file, then you must specify "local_recipient_maps =" (i.e. empty) in
> # the main.cf file, otherwise the SMTP server will reject mail for
> # non-UNIX accounts with "User unknown in local recipient table".
> #
> #luser_relay = $user@other.host
> #luser_relay = $local@other.host
> #luser_relay = admin+$local
>
> # JUNK MAIL CONTROLS
> #
> # The controls listed here are only a very small subset. See the file
> # sample-smtpd.cf for an elaborate list of anti-UCE controls.
>
> # The header_checks parameter specifies an optional table with patterns
> # that each logical message header is matched against, including
> # headers that span multiple physical lines.
> #
> # By default, these patterns also apply to MIME headers and to the
> # headers of attached messages. With older Postfix versions, MIME and
> # attached message headers were treated as body text.
> #
> # For details, see the sample-filter.cf file.
> #
> #header_checks = regexp:/etc/postfix/header_checks
>
> # FAST ETRN SERVICE
> #
> # Postfix maintains per-destination logfiles with information about
> # deferred mail, so that mail can be flushed quickly with the SMTP
> # "ETRN domain.tld" command, or by executing "sendmail -qRdomain.tld".
> #
> # By default, Postfix maintains deferred mail logfile information
> # only for destinations that Postfix is willing to relay to (as
> # specified in the relay_domains parameter). For other destinations,
> # Postfix attempts to deliver ALL queued mail after receiving the
> # SMTP "ETRN domain.tld" command, or after execution of "sendmail
> # -qRdomain.tld". This can be slow when a lot of mail is queued.
> #
> # The fast_flush_domains parameter controls what destinations are
> # eligible for this "fast ETRN/sendmail -qR" service.
> #
> #fast_flush_domains = $relay_domains
> #fast_flush_domains =
>
> # SHOW SOFTWARE VERSION OR NOT
> #
> # The smtpd_banner parameter specifies the text that follows the 220
> # code in the SMTP server's greeting banner. Some people like to see
> # the mail version advertised. By default, Postfix shows no version.
> #
> # You MUST specify $myhostname at the start of the text. That is an
> # RFC requirement. Postfix itself does not care.
> #
> #smtpd_banner = $myhostname ESMTP $mail_name
> #smtpd_banner = $myhostname ESMTP $mail_name ($mail_version)
> smtpd_banner = $myhostname ESMTP $mail_name ($mail_version) (Mandrake
Linux)
>
> # PARALLEL DELIVERY TO THE SAME DESTINATION
> #
> # How many parallel deliveries to the same user or domain? With local
> # delivery, it does not make sense to do massively parallel delivery
> # to the same user, because mailbox updates must happen sequentially,
> # and expensive pipelines in .forward files can cause disasters when
> # too many are run at the same time. With SMTP deliveries, 10
> # simultaneous connections to the same domain could be sufficient to
> # raise eyebrows.
> #
> # Each message delivery transport has its
XXX_destination_concurrency_limit
> # parameter.  The default is $default_destination_concurrency_limit for
> # most delivery transports. For the local delivery agent the default is 2.
>
> #local_destination_concurrency_limit = 2
> #default_destination_concurrency_limit = 10
>
> # DEBUGGING CONTROL
> #
> # The debug_peer_level parameter specifies the increment in verbose
> # logging level when an SMTP client or server host name or address
> # matches a pattern in the debug_peer_list parameter.
> #
> debug_peer_level = 2
>
> # The debug_peer_list parameter specifies an optional list of domain
> # or network patterns, /file/name patterns or type:name tables. When
> # an SMTP client or server host name or address matches a pattern,
> # increase the verbose logging level by the amount specified in the
> # debug_peer_level parameter.
> #
> #debug_peer_list = 127.0.0.1
> #debug_peer_list = some.domain
>
> # The debugger_command specifies the external command that is executed
> # when a Postfix daemon program is run with the -D option.
> #
> # Use "command .. & sleep 5" so that the debugger can attach before
> # the process marches on. If you use an X-based debugger, be sure to
> # set up your XAUTHORITY environment variable before starting Postfix.
> #
> debugger_command =
> PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin
> xxgdb $daemon_directory/$process_name $process_id & sleep 5
>
> # If you don't have X installed on the Postfix machine, try:
> # debugger_command =
> # PATH=/bin:/usr/bin:/usr/local/bin; export PATH; (echo cont;
> # echo where) | gdb $daemon_directory/$process_name $process_id 2>&1
> # >$config_directory/$process_name.$process_id.log & sleep 5
>
> # OTHER OPTIONS (Mandrake)
> # The delay_warning_time specifies after how many hours a warning
> # is sent that mail has not yet been delivered. By default, no warning
> # is sent.
> #
> delay_warning_time = 4
>
> # INSTALL-TIME CONFIGURATION INFORMATION
> #
> # The following parameters are used when installing a new Postfix version.
> #
> # sendmail_path: The full pathname of the Postfix sendmail command.
> # This is the Sendmail-compatible mail posting interface.
> #
> sendmail_path = /usr/sbin/sendmail.postfix
>
> # newaliases_path: The full pathname of the Postfix newaliases command.
> # This is the Sendmail-compatible command to build alias databases.
> #
> newaliases_path = /usr/bin/newaliases.postfix
>
> # mailq_path: The full pathname of the Postfix mailq command.  This
> # is the Sendmail-compatible mail queue listing command.
> #
> mailq_path = /usr/bin/mailq.postfix
>
> # setgid_group: The group for mail submission and queue management
> # commands.  This must be a group name with a numerical group ID that
> # is not shared with other accounts, not even with the Postfix account.
> #
> setgid_group = postdrop
>
> # manpage_directory: The location of the Postfix on-line manual pages.
> #
> manpage_directory = /usr/share/man
>
> # sample_directory: The location of the Postfix sample configuration
files.
> #
> sample_directory = /usr/share/doc/postfix-2.0.6/samples
>
> # readme_directory: The location of the Postfix README files.
> #
> readme_directory = /usr/share/doc/postfix-2.0.6/README_FILES
> alias_database = hash:/etc/postfix/aliases
>


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