339 lines
13 KiB
Plaintext
339 lines
13 KiB
Plaintext
#++
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# NAME
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# access 5
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# SUMMARY
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# Postfix access table format
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# SYNOPSIS
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# \fBpostmap /etc/postfix/access\fR
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#
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# \fBpostmap -q "\fIstring\fB" /etc/postfix/access\fR
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#
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# \fBpostmap -q - /etc/postfix/access <\fIinputfile\fR
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# DESCRIPTION
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# The optional \fBaccess\fR(5) table directs the Postfix SMTP server
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# to selectively reject or accept mail. Access can be allowed or
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# denied for specific host names, domain names, networks, host
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# addresses or mail addresses.
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#
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# For an example, see the EXAMPLE section at the end of this
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# manual page.
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#
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# Normally, the \fBaccess\fR(5) table is specified as a text file
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# that serves as input to the \fBpostmap\fR(1) command.
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# The result, an indexed file in \fBdbm\fR or \fBdb\fR format,
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# is used for fast searching by the mail system. Execute the command
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# "\fBpostmap /etc/postfix/access\fR" in order to rebuild the indexed
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# file after changing the access table.
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#
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# When the table is provided via other means such as NIS, LDAP
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# or SQL, the same lookups are done as for ordinary indexed files.
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#
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# Alternatively, the table can be provided as a regular-expression
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# map where patterns are given as regular expressions, or lookups
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# can be directed to TCP-based server. In that case, the lookups are
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# done in a slightly different way as described below under
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# "REGULAR EXPRESSION TABLES" and "TCP-BASED TABLES".
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# TABLE FORMAT
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# .ad
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# .fi
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# The input format for the \fBpostmap\fR(1) command is as follows:
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# .IP "\fIpattern action\fR"
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# When \fIpattern\fR matches a mail address, domain or host address,
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# perform the corresponding \fIaction\fR.
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# .IP "blank lines and comments"
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# Empty lines and whitespace-only lines are ignored, as
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# are lines whose first non-whitespace character is a `#'.
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# .IP "multi-line text"
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# A logical line starts with non-whitespace text. A line that
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# starts with whitespace continues a logical line.
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# EMAIL ADDRESS PATTERNS
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# .ad
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# .fi
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# With lookups from indexed files such as DB or DBM, or from networked
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# tables such as NIS, LDAP or SQL, patterns are tried in the order as
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# listed below:
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# .IP \fIuser\fR@\fIdomain\fR
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# Matches the specified mail address.
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# .IP \fIdomain.tld\fR
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# Matches \fIdomain.tld\fR as the domain part of an email address.
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# .sp
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# The pattern \fIdomain.tld\fR also matches subdomains, but only
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# when the string \fBsmtpd_access_maps\fR is listed in the Postfix
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# \fBparent_domain_matches_subdomains\fR configuration setting
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# (note that this is the default for some versions of Postfix).
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# Otherwise, specify \fI.domain.tld\fR (note the initial dot) in
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# order to match subdomains.
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# .IP \fIuser\fR@
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# Matches all mail addresses with the specified user part.
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# .PP
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# Note: lookup of the null sender address is not possible with
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# some types of lookup table. By default, Postfix uses \fB<>\fR
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# as the lookup key for such addresses. The value is specified with
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# the \fBsmtpd_null_access_lookup_key\fR parameter in the Postfix
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# \fBmain.cf\fR file.
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# EMAIL ADDRESS EXTENSION
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# .fi
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# .ad
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# When a mail address localpart contains the optional recipient delimiter
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# (e.g., \fIuser+foo\fR@\fIdomain\fR), the lookup order becomes:
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# \fIuser+foo\fR@\fIdomain\fR, \fIuser\fR@\fIdomain\fR, \fIdomain\fR,
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# \fIuser+foo\fR@, and \fIuser\fR@.
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# HOST NAME/ADDRESS PATTERNS
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# .ad
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# .fi
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# With lookups from indexed files such as DB or DBM, or from networked
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# tables such as NIS, LDAP or SQL, the following lookup patterns are
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# examined in the order as listed:
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# .IP \fIdomain.tld\fR
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# Matches \fIdomain.tld\fR.
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# .sp
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# The pattern \fIdomain.tld\fR also matches subdomains, but only
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# when the string \fBsmtpd_access_maps\fR is listed in the Postfix
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# \fBparent_domain_matches_subdomains\fR configuration setting.
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# Otherwise, specify \fI.domain.tld\fR (note the initial dot) in
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# order to match subdomains.
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# .IP \fInet.work.addr.ess\fR
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# .IP \fInet.work.addr\fR
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# .IP \fInet.work\fR
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# .IP \fInet\fR
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# Matches the specified IPv4 host address or subnetwork. An
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# IPv4 host address is a sequence of four decimal octets
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# separated by ".".
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#
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# Subnetworks are matched by repeatedly truncating the last
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# ".octet" from the remote IPv4 host address string until a
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# match is found in the access table, or until further
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# truncation is not possible.
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#
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# NOTE 1: The information in the access map should be in
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# canonical form, with unnecessary null characters eliminated.
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# Address information must not be enclosed with "[]" characters.
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#
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# NOTE 2: use the \fBcidr\fR lookup table type to specify
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# network/netmask patterns. See \fBcidr_table\fR(5) for details.
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# .IP \fInet:work:addr:ess\fR
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# .IP \fInet:work:addr\fR
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# .IP \fInet:work\fR
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# .IP \fInet\fR
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# Matches the specified IPv6 host address or subnetwork. An
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# IPv6 host address is a sequence of three to eight hexadecimal
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# octet pairs separated by ":".
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#
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# Subnetworks are matched by repeatedly truncating the last
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# ":octetpair" from the remote IPv6 host address string until
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# a match is found in the access table, or until further
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# truncation is not possible.
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#
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# NOTE 1: the truncation and comparison are done with the
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# string representation of the IPv6 host address. Thus, not
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# all the ":" subnetworks will be tried.
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#
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# NOTE 2: The information in the access map should be in
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# canonical form, with unnecessary null characters eliminated.
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# Address information must not be enclosed with "[]" characters.
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#
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# NOTE 3: use the \fBcidr\fR lookup table type to specify
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# network/netmask patterns. See \fBcidr_table\fR(5) for details.
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#
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# IPv6 support is available in Postfix 2.2 and later.
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# ACCEPT ACTIONS
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# .ad
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# .fi
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# .IP \fBOK\fR
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# Accept the address etc. that matches the pattern.
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# .IP \fIall-numerical\fR
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# An all-numerical result is treated as OK. This format is
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# generated by address-based relay authorization schemes.
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# REJECT ACTIONS
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# .ad
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# .fi
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# .IP "\fB4\fINN text\fR"
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# .IP "\fB5\fINN text\fR"
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# Reject the address etc. that matches the pattern, and respond with
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# the numerical three-digit code and text. \fB4\fINN\fR means "try
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# again later", while \fB5\fINN\fR means "do not try again".
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# .IP "\fBREJECT \fIoptional text...\fR
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# Reject the address etc. that matches the pattern. Reply with
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# \fI$reject_code optional text...\fR when the optional text is
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# specified, otherwise reply with a generic error response message.
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# .IP "\fBDEFER_IF_REJECT \fIoptional text...\fR
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# Defer the request if some later restriction would result in a
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# REJECT action. Reply with "\fB450\fI optional text...\fR when the
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# optional text is specified, otherwise reply with a generic error
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# response message.
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# .sp
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# This feature is available in Postfix 2.1 and later.
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# .IP "\fBDEFER_IF_PERMIT \fIoptional text...\fR
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# Defer the request if some later restriction would result in a
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# an explicit or implicit PERMIT action.
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# Reply with "\fB450\fI optional text...\fR when the
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# optional text is specified, otherwise reply with a generic error
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# response message.
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# .sp
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# This feature is available in Postfix 2.1 and later.
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# OTHER ACTIONS
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# .ad
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# .fi
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# .IP \fIrestriction...\fR
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# Apply the named UCE restriction(s) (\fBpermit\fR, \fBreject\fR,
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# \fBreject_unauth_destination\fR, and so on).
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# .IP "\fBDISCARD \fIoptional text...\fR
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# Claim successful delivery and silently discard the message.
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# Log the optional text if specified, otherwise log a generic
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# message.
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# .sp
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# Note: this action currently affects all recipients of the message.
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# .sp
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# This feature is available in Postfix 2.0 and later.
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# .IP \fBDUNNO\fR
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# Pretend that the lookup key was not found. This
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# prevents Postfix from trying substrings of the lookup key
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# (such as a subdomain name, or a network address subnetwork).
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# .sp
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# This feature is available in Postfix 2.0 and later.
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# .IP "\fBFILTER \fItransport:destination\fR"
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# After the message is queued, send the entire message through
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# the specified external content filter. The \fItransport:destination\fR
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# syntax is described in the \fBtransport\fR(5) manual page.
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# More information
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# about external content filters is in the Postfix FILTER_README file.
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# .sp
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# Note: this action overrides the \fBmain.cf content_filter\fR setting,
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# and currently affects all recipients of the message.
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# .sp
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# This feature is available in Postfix 2.0 and later.
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# .IP "\fBHOLD \fIoptional text...\fR"
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# Place the message on the \fBhold\fR queue, where it will sit
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# until someone either deletes it or releases it for delivery.
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# Log the optional text if specified, otherwise log a generic
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# message.
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#
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# Mail that is placed on hold can be examined with the
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# \fBpostcat\fR(1) command, and can be destroyed or released with
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# the \fBpostsuper\fR(1) command.
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# .sp
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# Note: use "\fBpostsuper -r\fR" to release mail that was kept on
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# hold for a significant fraction of \fB$maximal_queue_lifetime\fR
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# or \fB$bounce_queue_lifetime\fR, or longer.
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# .sp
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# Note: this action currently affects all recipients of the message.
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# .sp
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# This feature is available in Postfix 2.0 and later.
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# .IP "\fBPREPEND \fIheadername: headervalue\fR"
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# Prepend the specified message header to the message.
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# When this action is used multiple times, the first prepended
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# header appears before the second etc. prepended header.
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# .sp
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# Note: this action does not support multi-line message headers.
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# .sp
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# Note: this action must be used before the message content
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# is received; it cannot be used in \fBsmtpd_end_of_data_restrictions\fR.
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# .sp
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# This feature is available in Postfix 2.1 and later.
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# .IP "\fBREDIRECT \fIuser@domain\fR"
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# After the message is queued, send the message to the specified
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# address instead of the intended recipient(s).
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# .sp
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# Note: this action overrides the FILTER action, and currently affects
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# all recipients of the message.
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# .sp
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# This feature is available in Postfix 2.1 and later.
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# .IP "\fBWARN \fIoptional text...\fR
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# Log a warning with the optional text, together with client information
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# and if available, with helo, sender, recipient and protocol information.
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# .sp
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# This feature is available in Postfix 2.1 and later.
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# REGULAR EXPRESSION TABLES
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# .ad
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# .fi
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# This section describes how the table lookups change when the table
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# is given in the form of regular expressions. For a description of
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# regular expression lookup table syntax, see \fBregexp_table\fR(5)
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# or \fBpcre_table\fR(5).
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#
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# Each pattern is a regular expression that is applied to the entire
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# string being looked up. Depending on the application, that string
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# is an entire client hostname, an entire client IP address, or an
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# entire mail address. Thus, no parent domain or parent network search
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# is done, \fIuser@domain\fR mail addresses are not broken up into
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# their \fIuser@\fR and \fIdomain\fR constituent parts, nor is
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# \fIuser+foo\fR broken up into \fIuser\fR and \fIfoo\fR.
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#
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# Patterns are applied in the order as specified in the table, until a
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# pattern is found that matches the search string.
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#
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# Actions are the same as with indexed file lookups, with
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# the additional feature that parenthesized substrings from the
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# pattern can be interpolated as \fB$1\fR, \fB$2\fR and so on.
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# TCP-BASED TABLES
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# .ad
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# .fi
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# This section describes how the table lookups change when lookups
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# are directed to a TCP-based server. For a description of the TCP
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# client/server lookup protocol, see \fBtcp_table\fR(5).
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# This feature is not available up to and including Postfix version 2.2.
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#
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# Each lookup operation uses the entire query string once.
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# Depending on the application, that string is an entire client
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# hostname, an entire client IP address, or an entire mail address.
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# Thus, no parent domain or parent network search is done,
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# \fIuser@domain\fR mail addresses are not broken up into
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# their \fIuser@\fR and \fIdomain\fR constituent parts, nor is
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# \fIuser+foo\fR broken up into \fIuser\fR and \fIfoo\fR.
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#
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# Actions are the same as with indexed file lookups.
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# EXAMPLE
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# .ad
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# .fi
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# The following example uses an indexed file, so that the
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# order of table entries does not matter. The example permits
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# access by the client at address 1.2.3.4 but rejects all
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# other clients in 1.2.3.0/24. Instead of \fBhash\fR lookup
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# tables, some systems use \fBdbm\fR. Use the command
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# "\fBpostconf -m\fR" to find out what lookup tables Postfix
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# supports on your system.
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#
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# .na
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# .nf
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# /etc/postfix/main.cf:
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# .in +4
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# smtpd_client_restrictions =
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# .in +4
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# check_client_access hash:/etc/postfix/access
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#
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# .in -8
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# /etc/postfix/access:
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# .in +4
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# 1.2.3 REJECT
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# 1.2.3.4 OK
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# .in -4
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#
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# Execute the command "\fBpostmap /etc/postfix/access\fR" after
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# editing the file.
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# BUGS
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# The table format does not understand quoting conventions.
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# SEE ALSO
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# postmap(1), Postfix lookup table manager
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# smtpd(8), SMTP server
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# postconf(5), configuration parameters
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# transport(5), transport:nexthop syntax
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# README FILES
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# .ad
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# .fi
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# Use "\fBpostconf readme_directory\fR" or
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# "\fBpostconf html_directory\fR" to locate this information.
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# .na
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# .nf
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# SMTPD_ACCESS_README, built-in SMTP server access control
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# DATABASE_README, Postfix lookup table overview
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# LICENSE
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# .ad
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# .fi
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# The Secure Mailer license must be distributed with this software.
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# AUTHOR(S)
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# Wietse Venema
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# IBM T.J. Watson Research
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# P.O. Box 704
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# Yorktown Heights, NY 10598, USA
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#--
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