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cleanup (8)
cleanup (8) ( Русские man: Команды системного администрирования )
>> cleanup (8) ( Linux man: Команды системного администрирования )
NAME
cleanup
-
canonicalize and enqueue Postfix message
SYNOPSIS
cleanup [generic Postfix daemon options]
DESCRIPTION
The cleanup(8) daemon processes inbound mail, inserts it
into the incoming mail queue, and informs the queue
manager of its arrival.
The cleanup(8) daemon always performs the following transformations:
*
Insert missing message headers: (Resent-) From:,
To:, Message-Id:, and Date:.
*
Transform envelope and header addresses to the standard
user@fully-qualified-domain form that is expected by other
Postfix programs.
This task is delegated to the trivial-rewrite(8) daemon.
*
Eliminate duplicate envelope recipient addresses.
The following address transformations are optional:
*
Optionally, rewrite all envelope and header addresses according
to the mappings specified in the canonical(5) lookup tables.
*
Optionally, masquerade envelope sender addresses and message
header addresses (i.e. strip host or domain information below
all domains listed in the masquerade_domains parameter,
except for user names listed in masquerade_exceptions).
By default, address masquerading does not affect envelope recipients.
*
Optionally, expand envelope recipients according to information
found in the virtual(5) lookup tables.
The cleanup(8) daemon performs sanity checks on the content of
each message. When it finds a problem, by default it returns a
diagnostic status to the client, and leaves it up to the client
to deal with the problem. Alternatively, the client can request
the cleanup(8) daemon to bounce the message back to the sender
in case of trouble.
STANDARDS
RFC 822 (ARPA Internet Text Messages)
RFC 2045 (MIME: Format of Internet Message Bodies)
RFC 2046 (MIME: Media Types)
RFC 3463 (Enhanced Status Codes)
RFC 3464 (Delivery status notifications)
DIAGNOSTICS
Problems and transactions are logged to syslogd(8).
BUGS
Table-driven rewriting rules make it hard to express if then
else and other logical relationships.
CONFIGURATION PARAMETERS
Changes to main.cf are picked up automatically, as
cleanup(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.
Message header that the Postfix cleanup(8) server inserts when a
message contains no To: or Cc: message header.
Available in Postfix version 2.1 only:
enable_errors_to (no)
Report mail delivery errors to the address specified with the
non-standard Errors-To: message header, instead of the envelope
sender address (this feature is removed with Postfix version 2.2, is
turned off by default with Postfix version 2.1, and is always turned on
with older Postfix versions).
BUILT-IN CONTENT FILTERING CONTROLS
Postfix built-in content filtering is meant to stop a flood of
worms or viruses. It is not a general content filter.
body_checks (empty)
Optional lookup tables for content inspection as specified in
the body_checks(5) manual page.
header_checks (empty)
Optional lookup tables for content inspection of primary non-MIME
message headers, as specified in the header_checks(5) manual page.
Available in Postfix version 2.0 and later:
body_checks_size_limit (51200)
How much text in a message body segment (or attachment, if you
prefer to use that term) is subjected to body_checks inspection.
mime_header_checks ($header_checks)
Optional lookup tables for content inspection of MIME related
message headers, as described in the header_checks(5) manual page.
nested_header_checks ($header_checks)
Optional lookup tables for content inspection of non-MIME message
headers in attached messages, as described in the header_checks(5)
manual page.
Available in Postfix version 2.3 and later:
message_reject_characters (empty)
The set of characters that Postfix will reject in message
content.
message_strip_characters (empty)
The set of characters that Postfix will remove from message
content.
BEFORE QUEUE MILTER CONTROLS
As of version 2.3, Postfix supports the Sendmail version 8
Milter (mail filter) protocol. When mail is not received via
the smtpd(8) server, the cleanup(8) server will simulate
SMTP events to the extent that this is possible. For details
see the MILTER_README document.
non_smtpd_milters (empty)
A list of Milter (mail filter) applications for new mail that
does not arrive via the Postfix smtpd(8) server.
milter_protocol (2)
The mail filter protocol version and optional protocol extensions
for communication with a Milter (mail filter) application.
milter_default_action (tempfail)
The default action when a Milter (mail filter) application is
unavailable or mis-configured.
milter_macro_daemon_name ($myhostname)
The {daemon_name} macro value for Milter (mail filter) applications.
milter_macro_v ($mail_name $mail_version)
The {v} macro value for Milter (mail filter) applications.
milter_connect_timeout (30s)
The time limit for connecting to a Milter (mail filter)
application, and for negotiating protocol options.
milter_command_timeout (30s)
The time limit for sending an SMTP command to a Milter (mail
filter) application, and for receiving the response.
milter_content_timeout (300s)
The time limit for sending message content to a Milter (mail
filter) application, and for receiving the response.
milter_connect_macros (see postconf -n output)
The macros that are sent to Milter (mail filter) applications
after completion of an SMTP connection.
milter_helo_macros (see postconf -n output)
The macros that are sent to Milter (mail filter) applications
after the SMTP HELO or EHLO command.
milter_mail_macros (see postconf -n output)
The macros that are sent to Milter (mail filter) applications
after the SMTP MAIL FROM command.
milter_rcpt_macros (see postconf -n output)
The macros that are sent to Milter (mail filter) applications
after the SMTP RCPT TO command.
milter_data_macros (see postconf -n output)
The macros that are sent to version 4 or higher Milter (mail
filter) applications after the SMTP DATA command.
milter_unknown_command_macros (see postconf -n output)
The macros that are sent to version 3 or higher Milter (mail
filter) applications after an unknown SMTP command.
milter_end_of_data_macros (see postconf -n output)
The macros that are sent to Milter (mail filter) applications
after the message end-of-data.
MIME PROCESSING CONTROLS
Available in Postfix version 2.0 and later:
disable_mime_input_processing (no)
Turn off MIME processing while receiving mail.
mime_boundary_length_limit (2048)
The maximal length of MIME multipart boundary strings.
mime_nesting_limit (100)
The maximal recursion level that the MIME processor will handle.
strict_8bitmime (no)
Enable both strict_7bit_headers and strict_8bitmime_body.
strict_7bit_headers (no)
Reject mail with 8-bit text in message headers.
strict_8bitmime_body (no)
Reject 8-bit message body text without 8-bit MIME content encoding
information.
strict_mime_encoding_domain (no)
Reject mail with invalid Content-Transfer-Encoding: information
for the message/* or multipart/* MIME content types.
AUTOMATIC BCC RECIPIENT CONTROLS
Postfix can automatically add BCC (blind carbon copy)
when mail enters the mail system:
always_bcc (empty)
Optional address that receives a "blind carbon copy" of each message
that is received by the Postfix mail system.
What address lookup tables copy an address extension from the lookup
key to the lookup result.
Available before Postfix version 2.0:
virtual_maps (empty)
Optional lookup tables with a) names of domains for which all
addresses are aliased to addresses in other local or remote domains,
and b) addresses that are aliased to addresses in other local or
remote domains.
Available in Postfix version 2.0 and later:
virtual_alias_maps ($virtual_maps)
Optional lookup tables that alias specific mail addresses or domains
to other local or remote address.
What addresses are subject to sender_canonical_maps address
mapping.
remote_header_rewrite_domain (empty)
Don't rewrite message headers from remote clients at all when
this parameter is empty; otherwise, rewrite message headers and
append the specified domain name to incomplete addresses.
RESOURCE AND RATE CONTROLS
duplicate_filter_limit (1000)
The maximal number of addresses remembered by the address
duplicate filter for aliases(5) or virtual(5) alias expansion, or
for showq(8) queue displays.
header_size_limit (102400)
The maximal amount of memory in bytes for storing a message header.
hopcount_limit (50)
The maximal number of Received: message headers that is allowed
in the primary message headers.
in_flow_delay (1s)
Time to pause before accepting a new message, when the message
arrival rate exceeds the message delivery rate.
message_size_limit (10240000)
The maximal size in bytes of a message, including envelope information.
Available in Postfix version 2.0 and later:
header_address_token_limit (10240)
The maximal number of address tokens are allowed in an address
message header.
mime_boundary_length_limit (2048)
The maximal length of MIME multipart boundary strings.
mime_nesting_limit (100)
The maximal recursion level that the MIME processor will handle.
queue_file_attribute_count_limit (100)
The maximal number of (name=value) attributes that may be stored
in a Postfix queue file.
Available in Postfix version 2.1 and later:
virtual_alias_expansion_limit (1000)
The maximal number of addresses that virtual alias expansion produces
from each original recipient.
virtual_alias_recursion_limit (1000)
The maximal nesting depth of virtual alias expansion.
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.
delay_logging_resolution_limit (2)
The maximal number of digits after the decimal point when logging
sub-second delay values.
delay_warning_time (0h)
The time after which the sender receives the message headers of
mail that is still queued.
ipc_timeout (3600s)
The time limit for sending or receiving information over an internal
communication channel.
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.
myorigin ($myhostname)
The domain name that locally-posted mail appears to come
from, and that locally posted mail is delivered to.
process_id (read-only)
The process ID of a Postfix command or daemon process.
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 directory.
soft_bounce (no)
Safety net to keep mail queued that would otherwise be returned to
the sender.
syslog_facility (mail)
The syslog facility of Postfix logging.
syslog_name (postfix)
The mail system name that is prepended to the process name in syslog
records, so that "smtpd" becomes, for example, "postfix/smtpd".
Available in Postfix version 2.1 and later:
enable_original_recipient (yes)
Enable support for the X-Original-To message header.
