    SMTPD(8)                                                 SMTPD(8)

    NAME
           smtpd - Postfix SMTP server

    SYNOPSIS
           smtpd [generic Postfix daemon options]

    DESCRIPTION
           The  SMTP  server  accepts network connection requests and
           performs zero or more SMTP  transactions  per  connection.
           Each received message is piped through the cleanup(8) dae-
           mon, and is placed into the incoming queue as  one  single
           queue  file.   For  this  mode  of  operation, the program
           expects to be run from the master(8) process manager.

           Alternatively, the SMTP server takes an  established  con-
           nection  on  standard input and deposits messages directly
           into the maildrop queue.  In  this  so-called  stand-alone
           mode,  the SMTP server can accept mail even while the mail
           system is not running.

           The SMTP server implements a variety of policies for  con-
           nection  requests, and for parameters given to HELO, ETRN,
           MAIL FROM, VRFY and RCPT TO commands.  They  are  detailed
           below and in the main.cf configuration file.

    SECURITY
           The SMTP server is moderately security-sensitive. It talks
           to SMTP clients and to DNS servers  on  the  network.  The
           SMTP server can be run chrooted at fixed low privilege.

    STANDARDS
           RFC 821 (SMTP protocol)
           RFC 1123 (Host requirements)
           RFC 1652 (8bit-MIME transport)
           RFC 1869 (SMTP service extensions)
           RFC 1870 (Message Size Declaration)
           RFC 1985 (ETRN command)
           RFC 2554 (AUTH command)
           RFC 2821 (SMTP protocol)
           RFC 2920 (SMTP Pipelining)

    DIAGNOSTICS
           Problems and transactions are logged to syslogd(8).

           Depending  on the setting of the notify_classes parameter,
           the postmaster is notified of bounces, protocol  problems,
           policy violations, and of other trouble.

    CONFIGURATION PARAMETERS
           Changes   to  main.cf  are  picked  up  automatically,  as
           smtpd(8) processes run for only a limited amount of  time.
           Use the command "postfix reload" to speed up a change.

           The  text  below  provides  only  a parameter summary. See
           postconf(5) for more details including examples.

    COMPATIBILITY CONTROLS
           The following parameters work around implementation errors
           in  other software, and/or allow you to override standards
           in order to prevent undesirable use.

           broken_sasl_auth_clients (no)
                  Enable inter-operability  with  SMTP  clients  that
                  implement  an  obsolete version of the AUTH command
                  (RFC 2554).

           disable_vrfy_command (no)
                  Disable the SMTP VRFY command.

           smtpd_noop_commands (empty)
                  List of  commands  that  the  Postfix  SMTP  server
                  replies  to with "250 Ok", without doing any syntax
                  checks and without changing state.

           strict_rfc821_envelopes (no)
                  Require that addresses received in SMTP  MAIL  FROM
                  and RCPT TO commands are enclosed with <>, and that
                  those addresses do not contain RFC 822  style  com-
                  ments or phrases.

           Available in Postfix version 2.1 and later:

           resolve_null_domain (no)
                  Resolve an address that ends in the "@" null domain
                  as if the local hostname were specified, instead of
                  rejecting the address as invalid.

           smtpd_reject_unlisted_sender (no)
                  Request  that  the Postfix SMTP server rejects mail
                  from  unknown  sender  addresses,  even   when   no
                  explicit  reject_unlisted_sender access restriction
                  is specified.

           smtpd_sasl_exceptions_networks (empty)
                  What SMTP clients Postfix will not offer AUTH  sup-
                  port to.

    AFTER QUEUE EXTERNAL CONTENT INSPECTION CONTROLS
           As  of  version 1.0, Postfix can be configured to send new
           mail to an external  content  filter  AFTER  the  mail  is
           queued.  This  content  filter  is expected to inject mail
           back into a (Postfix or other) MTA for  further  delivery.
           See the FILTER_README document for details.

           content_filter (empty)
                  The  name of a mail delivery transport that filters
                  mail after it is queued.

    BEFORE QUEUE EXTERNAL CONTENT INSPECTION CONTROLS
           As of version 2.1, the Postfix SMTP server can be  config-
           ured  to send incoming mail to a real-time SMTP-based con-
           tent filter BEFORE mail is queued.  This content filter is
           expected  to  inject  mail  back  into  Postfix.   See the
           SMTPD_PROXY_README document for details on how to  config-
           ure and operate this feature.

           smtpd_proxy_filter (empty)
                  The  hostname  and  TCP  port of the mail filtering
                  proxy server.

           smtpd_proxy_ehlo ($myhostname)
                  How the Postfix SMTP server announces itself to the
                  proxy filter.

           smtpd_proxy_timeout (100s)
                  The time limit for connecting to a proxy filter and
                  for sending or receiving information.

    GENERAL CONTENT INSPECTION CONTROLS
           The following parameters are applicable for both  built-in
           and external content filters.

           Available in Postfix version 2.1 and later:

           receive_override_options (empty)
                  Enable  or  disable  recipient validation, built-in
                  content filtering, or address rewriting.

    EXTERNAL CONTENT INSPECTION CONTROLS
           The following parameters are applicable for  both  before-
           queue and after-queue content filtering.

           Available in Postfix version 2.1 and later:

           smtpd_authorized_xforward_hosts (empty)
                  What  SMTP  clients are allowed to use the XFORWARD
                  feature.

    SASL AUTHENTICATION CONTROLS
           Postfix SASL support (RFC 2554) can be used  to  authenti-
           cate  remote  SMTP clients to the Postfix SMTP server, and
           to authenticate the Postfix SMTP client to a  remote  SMTP
           server.  See the SASL_README document for details.

           broken_sasl_auth_clients (no)
                  Enable  inter-operability  with  SMTP  clients that
                  implement an obsolete version of the  AUTH  command
                  (RFC 2554).

           smtpd_sasl_auth_enable (no)
                  Enable  SASL  authentication  in  the  Postfix SMTP
                  server.

           smtpd_sasl_application_name (smtpd)
                  The application name used for SASL server  initial-
                  ization.

           smtpd_sasl_local_domain (empty)
                  The name of the local SASL authentication realm.

           smtpd_sasl_security_options (noanonymous)
                  Restrict what authentication mechanisms the Postfix
                  SMTP server will offer to the client.

           smtpd_sender_login_maps (empty)
                  Optional lookup table with  the  SASL  login  names
                  that own sender (MAIL FROM) addresses.

           Available in Postfix version 2.1 and later:

           smtpd_sasl_exceptions_networks (empty)
                  What  SMTP clients Postfix will not offer AUTH sup-
                  port to.

    VERP SUPPORT CONTROLS
           With VERP style delivery,  each  recipient  of  a  message
           receives a customized copy of the message with his/her own
           recipient address encoded in the envelope sender  address.
           The VERP_README file describes configuration and operation
           details of Postfix support for  variable  envelope  return
           path addresses.  VERP style delivery is requested with the
           SMTP XVERP command or with the "sendmail -V"  command-line
           option  and is available in Postfix version 1.1 and later.

           default_verp_delimiters (+=)
                  The two default VERP delimiter characters.

           verp_delimiter_filter (-=+)
                  The characters Postfix accepts  as  VERP  delimiter
                  characters  on the Postfix sendmail(1) command line
                  and in SMTP commands.

           Available in Postfix version 1.1 and 2.0:

           authorized_verp_clients ($mynetworks)
                  What SMTP clients are allowed to specify the  XVERP
                  command.

           Available in Postfix version 2.1 and later:

           smtpd_authorized_verp_clients ($authorized_verp_clients)
                  What  SMTP clients are allowed to specify the XVERP
                  command.

    TROUBLE SHOOTING CONTROLS
           The DEBUG_README document describes how to debug parts  of
           the  Postfix mail system. The methods vary from making the
           software log a lot of detail, to running some daemon  pro-
           cesses under control of a call tracer or debugger.

           debug_peer_level (2)
                  The  increment  in  verbose  logging  level  when a
                  remote client or server matches a  pattern  in  the
                  debug_peer_list parameter.

           debug_peer_list (empty)
                  Optional  list  of remote client or server hostname
                  or network address patterns that cause the  verbose
                  logging  level  to increase by the amount specified
                  in $debug_peer_level.

           error_notice_recipient (postmaster)
                  The recipient  of  postmaster  notifications  about
                  mail  delivery  problems that are caused by policy,
                  resource, software or protocol errors.

           notify_classes (resource, software)
                  The list of error classes that are reported to  the
                  postmaster.

           soft_bounce (no)
                  Safety net to keep mail queued that would otherwise
                  be returned to the sender.

           Available in Postfix version 2.1 and later:

           smtpd_authorized_xclient_hosts (empty)
                  What SMTP clients are allowed to  use  the  XCLIENT
                  feature.

    KNOWN VERSUS UNKNOWN RECIPIENT CONTROLS
           As  of  Postfix  version 2.0, the SMTP server rejects mail
           for unknown recipients. This prevents the mail queue  from
           clogging  up  with  undeliverable  MAILER-DAEMON messages.
           Additional  information  on   this   topic   is   in   the
           LOCAL_RECIPIENT_README and ADDRESS_CLASS_README documents.

           show_user_unknown_table_name (yes)
                  Display the name of  the  recipient  table  in  the
                  "User unknown" responses.

           canonical_maps (empty)
                  Optional  address mapping lookup tables for message
                  headers and envelopes.

           recipient_canonical_maps (empty)
                  Optional address mapping lookup tables for envelope
                  and header recipient addresses.

           Parameters concerning known/unknown local recipients:

           mydestination  ($myhostname,  localhost.$mydomain,  local-
           host)
                  The  list  of  domains  that  are delivered via the
                  $local_transport mail delivery transport.

           inet_interfaces (all)
                  The network interface addresses that this mail sys-
                  tem receives mail on.

           proxy_interfaces (empty)
                  The network interface addresses that this mail sys-
                  tem receives mail on by way of a proxy  or  network
                  address translation unit.

           local_recipient_maps             (proxy:unix:passwd.byname
           $alias_maps)
                  Lookup  tables with all names or addresses of local
                  recipients: a recipient address is local  when  its
                  domain  matches $mydestination, $inet_interfaces or
                  $proxy_interfaces.

           unknown_local_recipient_reject_code (550)
                  The numerical Postfix  SMTP  server  response  code
                  when    a   recipient   address   is   local,   and
                  $local_recipient_maps specifies a  list  of  lookup
                  tables that does not match the recipient.

           Parameters  concerning  known/unknown  recipients of relay
           destinations:

           relay_domains ($mydestination)
                  What destination domains (and  subdomains  thereof)
                  this system will relay mail to.

           relay_recipient_maps (empty)
                  Optional  lookup tables with all valid addresses in
                  the domains that match $relay_domains.

           unknown_relay_recipient_reject_code (550)
                  The numerical Postfix SMTP server reply code when a
                  recipient   address   matches  $relay_domains,  and
                  relay_recipient_maps specifies  a  list  of  lookup
                  tables that does not match the recipient address.

           Parameters  concerning known/unknown recipients in virtual
           alias domains:

           virtual_alias_domains ($virtual_alias_maps)
                  Postfix is final destination for the specified list
                  of  virtual  alias  domains,  that  is, domains for
                  which all addresses are  aliased  to  addresses  in
                  other local or remote domains.

           virtual_alias_maps ($virtual_maps)
                  Optional  lookup  tables  that  alias specific mail
                  addresses or  domains  to  other  local  or  remote
                  address.

           unknown_virtual_alias_reject_code (550)
                  The SMTP server reply code when a recipient address
                  matches    $virtual_alias_domains,    and     $vir-
                  tual_alias_maps  specifies  a list of lookup tables
                  that does not match the recipient address.

           Parameters concerning known/unknown recipients in  virtual
           mailbox domains:

           virtual_mailbox_domains ($virtual_mailbox_maps)
                  Postfix is final destination for the specified list
                  of  domains;  mail  is  delivered  via  the   $vir-
                  tual_transport mail delivery transport.

           virtual_mailbox_maps (empty)
                  Optional  lookup tables with all valid addresses in
                  the domains that match $virtual_mailbox_domains.

           unknown_virtual_mailbox_reject_code (550)
                  The SMTP server reply code when a recipient address
                  matches    $virtual_mailbox_domains,    and   $vir-
                  tual_mailbox_maps specifies a list of lookup tables
                  that does not match the recipient address.

    RESOURCE AND RATE CONTROLS
           The  following parameters limit resource usage by the SMTP
           server and/or control client request rates.

           line_length_limit (2048)
                  Upon input, long lines are chopped up  into  pieces
                  of  at  most this length; upon delivery, long lines
                  are reconstructed.

           queue_minfree (0)
                  The minimal amount of free space in  bytes  in  the
                  queue file system that is needed to receive mail.

           message_size_limit (10240000)
                  The  maximal  size in bytes of a message, including
                  envelope information.

           smtpd_recipient_limit (1000)
                  The maximal number of recipients that  the  Postfix
                  SMTP server accepts per message delivery request.

           smtpd_timeout (300s)
                  The  time  limit  for sending a Postfix SMTP server
                  response and for receiving  a  remote  SMTP  client
                  request.

           smtpd_history_flush_threshold (100)
                  The  maximal  number  of  lines in the Postfix SMTP
                  server command history before it  is  flushed  upon
                  receipt of EHLO, RSET, or end of DATA.

           Not available in Postfix version 2.1:

           smtpd_client_connection_count_limit (50)
                  How  many  simultaneous connections any SMTP client
                  is allowed to make to the SMTP service.

           smtpd_client_connection_rate_limit (0)
                  The  maximal  number  of  connection  attempts  any
                  client  is allowed to make to this service per time
                  unit.

           smtpd_client_connection_limit_exceptions ($mynetworks)
                  Clients that are excluded from connection count  or
                  connection rate restrictions.

    TARPIT CONTROLS
           When  a  remote SMTP client makes errors, the Postfix SMTP
           server can insert delays before responding. This can  help
           to  slow  down  run-away  software.   The behavior is con-
           trolled by an error counter  that  counts  the  number  of
           errors  within an SMTP session that a client makes without
           delivering mail.

           smtpd_error_sleep_time (1s)
                  With  Postfix  2.1  and  later:  the  SMTP   server
                  response  delay  after  a client has made more than
                  $smtpd_soft_error_limit  errors,  and  fewer   than
                  $smtpd_hard_error_limit  errors, without delivering
                  mail.

           smtpd_soft_error_limit (10)
                  The number  of  errors  a  remote  SMTP  client  is
                  allowed  to make without delivering mail before the
                  Postfix SMTP server slows down all its responses.

           smtpd_hard_error_limit (20)
                  The maximal number of errors a remote  SMTP  client
                  is allowed to make without delivering mail.

           smtpd_junk_command_limit (100)
                  The  number  of  junk commands (NOOP, VRFY, ETRN or
                  RSET) that a remote SMTP client can send before the
                  Postfix  SMTP  server starts to increment the error
                  counter with each junk command.

           Available in Postfix version 2.1 and later:

           smtpd_recipient_overshoot_limit (1000)
                  The number of recipients that a remote SMTP  client
                  can  send  in  excess  of  the limit specified with
                  $smtpd_recipient_limit,  before  the  Postfix  SMTP
                  server  increments  the per-session error count for
                  each excess recipient.

    ACCESS POLICY DELEGATION CONTROLS
           As of version 2.1, Postfix can be configured  to  delegate
           access  policy  decisions  to an external server that runs
           outside Postfix.  See  the  file  SMTPD_POLICY_README  for
           more information.

           smtpd_policy_service_max_idle (300s)
                  The  time  after which an idle SMTPD policy service
                  connection is closed.

           smtpd_policy_service_max_ttl (1000s)
                  The time after which an active SMTPD policy service
                  connection is closed.

           smtpd_policy_service_timeout (100s)
                  The  time  limit  for  connecting to, writing to or
                  receiving from a delegated SMTPD policy server.

    ACCESS CONTROLS
           The SMTPD_ACCESS_README document gives an introduction  to
           all the SMTP server access control features.

           smtpd_delay_reject (yes)
                  Wait  until  the  RCPT TO command before evaluating
                  $smtpd_client_restrictions,    $smtpd_helo_restric-
                  tions and $smtpd_sender_restrictions, or wait until
                  the     ETRN     command     before      evaluating
                  $smtpd_client_restrictions and $smtpd_helo_restric-
                  tions.

           parent_domain_matches_subdomains (see 'postconf  -d'  out-
           put)
                  What   Postfix   features   match   subdomains   of
                  "domain.tld" automatically, instead of requiring an
                  explicit ".domain.tld" pattern.

           smtpd_client_restrictions (empty)
                  Optional SMTP server  access  restrictions  in  the
                  context of a client SMTP connection request.

           smtpd_helo_required (no)
                  Require that a remote SMTP client introduces itself
                  at the beginning of an SMTP session with  the  HELO
                  or EHLO command.

           smtpd_helo_restrictions (empty)
                  Optional  restrictions that the Postfix SMTP server
                  applies in the context of the SMTP HELO command.

           smtpd_sender_restrictions (empty)
                  Optional restrictions that the Postfix SMTP  server
                  applies in the context of the MAIL FROM command.

           smtpd_recipient_restrictions           (permit_mynetworks,
           reject_unauth_destination)
                  The  access  restrictions  that  the  Postfix  SMTP
                  server applies in the context of the RCPT  TO  com-
                  mand.

           smtpd_etrn_restrictions (empty)
                  Optional  SMTP  server  access  restrictions in the
                  context of a client ETRN request.

           allow_untrusted_routing (no)
                  Forward   mail   with   sender-specified    routing
                  (user[@%!]remote[@%!]site)  from  untrusted clients
                  to destinations matching $relay_domains.

           smtpd_restriction_classes (empty)
                  User-defined aliases for groups of access  restric-
                  tions.

           smtpd_null_access_lookup_key (<>)
                  The  lookup key to be used in SMTP access(5) tables
                  instead of the null sender address.

           permit_mx_backup_networks (empty)
                  Restrict  the  use  of  the  permit_mx_backup  SMTP
                  access  feature  to  only  domains whose primary MX
                  hosts match the listed networks.

           Available in Postfix version 2.0 and later:

           smtpd_data_restrictions (empty)
                  Optional access restrictions that the Postfix  SMTP
                  server applies in the context of the SMTP DATA com-
                  mand.

           smtpd_expansion_filter (see 'postconf -d' output)
                  What characters are allowed in $name expansions  of
                  RBL reply templates.

           Available in Postfix version 2.1 and later:

           smtpd_reject_unlisted_sender (no)
                  Request  that  the Postfix SMTP server rejects mail
                  from  unknown  sender  addresses,  even   when   no
                  explicit  reject_unlisted_sender access restriction
                  is specified.

           smtpd_reject_unlisted_recipient (yes)
                  Request that the Postfix SMTP server  rejects  mail
                  for  unknown  recipient  addresses,  even  when  no
                  explicit reject_unlisted_recipient access  restric-
                  tion is specified.

    SENDER AND RECIPIENT ADDRESS VERIFICATION CONTROLS
           Postfix   version  2.1  introduces  sender  and  recipient
           address verification.   This  feature  is  implemented  by
           sending  probe email messages that are not actually deliv-
           ered.  This feature is requested  via  the  reject_unveri-
           fied_sender    and    reject_unverified_recipient   access
           restrictions.  The status of verification probes is  main-
           tained by the verify(8) server.  See the file ADDRESS_VER-
           IFICATION_README for information about  how  to  configure
           and operate the Postfix sender/recipient address verifica-
           tion service.

           address_verify_poll_count (3)
                  How many times to query the verify(8)  service  for
                  the  completion  of an address verification request
                  in progress.

           address_verify_poll_delay (3s)
                  The delay between queries for the completion of  an
                  address verification request in progress.

           address_verify_sender (postmaster)
                  The  sender  address to use in address verification
                  probes.

           unverified_sender_reject_code (450)
                  The numerical Postfix  SMTP  server  response  code
                  when   a  recipient  address  is  rejected  by  the
                  reject_unverified_sender restriction.

           unverified_recipient_reject_code (450)
                  The numerical Postfix SMTP server response  when  a
                  recipient address is rejected by the reject_unveri-
                  fied_recipient restriction.

    ACCESS CONTROL RESPONSES
           The following  parameters  control  numerical  SMTP  reply
           codes and/or text responses.

           access_map_reject_code (554)
                  The  numerical  Postfix  SMTP  server response code
                  when a client  is  rejected  by  an  access(5)  map
                  restriction.

           defer_code (450)
                  The  numerical  Postfix  SMTP  server response code
                  when a remote SMTP client request  is  rejected  by
                  the "defer" restriction.

           invalid_hostname_reject_code (501)
                  The  numerical  Postfix  SMTP  server response code
                  when the client HELO or EHLO command  parameter  is
                  rejected  by  the  reject_invalid_hostname restric-
                  tion.

           maps_rbl_reject_code (554)
                  The numerical Postfix  SMTP  server  response  code
                  when a remote SMTP client request is blocked by the
                  reject_rbl_client,             reject_rhsbl_client,
                  reject_rhsbl_sender    or    reject_rhsbl_recipient
                  restriction.

           non_fqdn_reject_code (504)
                  The numerical Postfix SMTP server reply code when a
                  client     request     is     rejected    by    the
                  reject_non_fqdn_hostname, reject_non_fqdn_sender or
                  reject_non_fqdn_recipient restriction.

           reject_code (554)
                  The  numerical  Postfix  SMTP  server response code
                  when a remote SMTP client request  is  rejected  by
                  the "reject" restriction.

           relay_domains_reject_code (554)
                  The  numerical  Postfix  SMTP  server response code
                  when  a  client  request   is   rejected   by   the
                  reject_unauth_destination recipient restriction.

           unknown_address_reject_code (450)
                  The  numerical  Postfix  SMTP  server response code
                  when a sender or recipient address is  rejected  by
                  the         reject_unknown_sender_domain         or
                  reject_unknown_recipient_domain restriction.

           unknown_client_reject_code (450)
                  The numerical Postfix  SMTP  server  response  code
                  when  a  client without valid address <=> name map-
                  ping  is  rejected  by  the   reject_unknown_client
                  restriction.

           unknown_hostname_reject_code (450)
                  The  numerical  Postfix  SMTP  server response code
                  when the hostname specified with the HELO  or  EHLO
                  command  is rejected by the reject_unknown_hostname
                  restriction.

           Available in Postfix version 2.0 and later:

           default_rbl_reply (see 'postconf -d' output)
                  The default SMTP server  response  template  for  a
                  request  that  is rejected by an RBL-based restric-
                  tion.

           multi_recipient_bounce_reject_code (550)
                  The numerical Postfix  SMTP  server  response  code
                  when a remote SMTP client request is blocked by the
                  reject_multi_recipient_bounce restriction.

           rbl_reply_maps (empty)
                  Optional lookup tables with RBL response templates.

    MISCELLANEOUS CONTROLS
           config_directory (see 'postconf -d' output)
                  The  default  location  of  the Postfix main.cf and
                  master.cf configuration files.

           daemon_timeout (18000s)
                  How much time a Postfix daemon process may take  to
                  handle  a  request  before  it  is  terminated by a
                  built-in watchdog timer.

           command_directory (see 'postconf -d' output)
                  The location of  all  postfix  administrative  com-
                  mands.

           double_bounce_sender (double-bounce)
                  The sender address of postmaster notifications that
                  are generated by the mail system.

           ipc_timeout (3600s)
                  The time limit for sending or receiving information
                  over an internal communication channel.

           mail_name (Postfix)
                  The mail system name that is displayed in Received:
                  headers,  in  the  SMTP  greeting  banner,  and  in
                  bounced mail.

           mail_owner (postfix)
                  The UNIX system account that owns the Postfix queue
                  and most Postfix daemon processes.

           max_idle (100s)
                  The maximum amount of time  that  an  idle  Postfix
                  daemon  process  waits for the next service request
                  before exiting.

           max_use (100)
                  The maximal number of connection requests before  a
                  Postfix daemon process terminates.

           myhostname (see 'postconf -d' output)
                  The internet hostname of this mail system.

           mynetworks (see 'postconf -d' output)
                  The  list  of "trusted" SMTP clients that have more
                  privileges than "strangers".

           myorigin ($myhostname)
                  The domain name that locally-posted mail appears to
                  come  from,  and that locally posted mail is deliv-
                  ered to.

           process_id (read-only)
                  The process ID of a Postfix command or daemon  pro-
                  cess.

           process_name (read-only)
                  The  process  name  of  a Postfix command or daemon
                  process.

           queue_directory (see 'postconf -d' output)
                  The location of the Postfix top-level queue  direc-
                  tory.

           recipient_delimiter (empty)
                  The separator between user names and address exten-
                  sions (user+foo).

           smtpd_banner ($myhostname ESMTP $mail_name)
                  The text that follows the 220 status  code  in  the
                  SMTP greeting banner.

           syslog_facility (mail)
                  The syslog facility of Postfix logging.

           syslog_name (postfix)
                  The  mail system name that is prepended to the pro-
                  cess  name  in  syslog  records,  so  that  "smtpd"
                  becomes, for example, "postfix/smtpd".

    SEE ALSO
           cleanup(8), message canonicalization
           trivial-rewrite(8), address resolver
           verify(8), address verification service
           postconf(5), configuration parameters
           master(8), process manager
           syslogd(8), system logging

    README FILES
           ADDRESS_CLASS_README, blocking unknown hosted or relay recipients
           FILTER_README, external after-queue content filter
           LOCAL_RECIPIENT_README, blocking unknown local recipients
           SMTPD_ACCESS_README, built-in access policies
           SMTPD_POLICY_README, external policy server
           SMTPD_PROXY_README, external before-queue content filter
           SASL_README, Postfix SASL howto
           VERP_README, Postfix XVERP extension
           XCLIENT_README, Postfix XCLIENT extension
           XFORWARD_README, Postfix XFORWARD extension

    LICENSE
           The Secure Mailer license must be  distributed  with  this
           software.

    AUTHOR(S)
           Wietse Venema
           IBM T.J. Watson Research
           P.O. Box 704
           Yorktown Heights, NY 10598, USA

                                                             SMTPD(8)