251 lines
10 KiB
Plaintext
251 lines
10 KiB
Plaintext
# GENERIC(5) GENERIC(5)
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#
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# NAME
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# generic - Postfix generic table format
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#
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# SYNOPSIS
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# postmap /etc/postfix/generic
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#
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# postmap -q "string" /etc/postfix/generic
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#
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# postmap -q - /etc/postfix/generic <inputfile
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#
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# DESCRIPTION
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# The optional generic(5) table specifies an address mapping
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# that applies when mail is delivered. This is the opposite
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# of canonical(5) mapping, which applies when mail is
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# received.
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#
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# Typically, one would use the generic(5) table on a system
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# that does not have a valid Internet domain name and that
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# uses something like localdomain.local instead. The
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# generic(5) table is then used by the smtp(8) client to
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# transform local mail addresses into valid Internet mail
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# addresses when mail has to be sent across the Internet.
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# See the EXAMPLE section at the end of this document.
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#
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# The generic(5) mapping affects both message header
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# addresses (i.e. addresses that appear inside messages) and
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# message envelope addresses (for example, the addresses
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# that are used in SMTP protocol commands).
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#
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# Normally, the generic(5) table is specified as a text file
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# that serves as input to the postmap(1) command. The
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# result, an indexed file in dbm or db format, is used for
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# fast searching by the mail system. Execute the command
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# "postmap /etc/postfix/generic" to rebuild an indexed file
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# after changing the corresponding text file.
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#
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# When the table is provided via other means such as NIS,
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# LDAP or SQL, the same lookups are done as for ordinary
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# indexed files.
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#
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# Alternatively, the table can be provided as a regu-
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# lar-expression map where patterns are given as regular
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# expressions, or lookups can be directed to TCP-based
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# server. In those case, the lookups are done in a slightly
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# different way as described below under "REGULAR EXPRESSION
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# TABLES" or "TCP-BASED TABLES".
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#
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# CASE FOLDING
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# The search string is folded to lowercase before database
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# lookup. As of Postfix 2.3, the search string is not case
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# folded with database types such as regexp: or pcre: whose
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# lookup fields can match both upper and lower case.
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#
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# TABLE FORMAT
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# The input format for the postmap(1) command is as follows:
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#
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# pattern result
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# When pattern matches a mail address, replace it by
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# the corresponding result.
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#
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# blank lines and comments
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# Empty lines and whitespace-only lines are ignored,
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# as are lines whose first non-whitespace character
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# is a `#'.
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#
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# multi-line text
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# A logical line starts with non-whitespace text. A
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# line that starts with whitespace continues a logi-
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# cal line.
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#
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# TABLE SEARCH ORDER
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# With lookups from indexed files such as DB or DBM, or from
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# networked tables such as NIS, LDAP or SQL, each
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# user@domain query produces a sequence of query patterns as
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# described below.
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#
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# Each query pattern is sent to each specified lookup table
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# before trying the next query pattern, until a match is
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# found.
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#
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# user@domain address
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# Replace user@domain by address. This form has the
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# highest precedence.
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#
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# user address
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# Replace user@site by address when site is equal to
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# $myorigin, when site is listed in $mydestination,
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# or when it is listed in $inet_interfaces or
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# $proxy_interfaces.
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#
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# @domain address
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# Replace other addresses in domain by address. This
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# form has the lowest precedence.
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#
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# RESULT ADDRESS REWRITING
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# The lookup result is subject to address rewriting:
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#
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# o When the result has the form @otherdomain, the
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# result becomes the same user in otherdomain.
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#
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# o When "append_at_myorigin=yes", append "@$myorigin"
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# to addresses without "@domain".
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#
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# o When "append_dot_mydomain=yes", append ".$mydomain"
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# to addresses without ".domain".
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#
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# ADDRESS EXTENSION
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# When a mail address localpart contains the optional recip-
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# ient delimiter (e.g., user+foo@domain), the lookup order
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# becomes: user+foo@domain, user@domain, user+foo, user, and
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# @domain.
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#
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# The propagate_unmatched_extensions parameter controls
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# whether an unmatched address extension (+foo) is propa-
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# gated to the result of table lookup.
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#
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# REGULAR EXPRESSION TABLES
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# This section describes how the table lookups change when
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# the table is given in the form of regular expressions. For
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# a description of regular expression lookup table syntax,
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# see regexp_table(5) or pcre_table(5).
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#
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# Each pattern is a regular expression that is applied to
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# the entire address being looked up. Thus, user@domain mail
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# addresses are not broken up into their user and @domain
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# constituent parts, nor is user+foo broken up into user and
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# foo.
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#
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# Patterns are applied in the order as specified in the ta-
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# ble, until a pattern is found that matches the search
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# string.
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#
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# Results are the same as with indexed file lookups, with
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# the additional feature that parenthesized substrings from
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# the pattern can be interpolated as $1, $2 and so on.
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#
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# TCP-BASED TABLES
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# This section describes how the table lookups change when
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# lookups are directed to a TCP-based server. For a descrip-
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# tion of the TCP client/server lookup protocol, see tcp_ta-
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# ble(5). This feature is not available up to and including
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# Postfix version 2.4.
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#
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# Each lookup operation uses the entire address once. Thus,
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# user@domain mail addresses are not broken up into their
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# user and @domain constituent parts, nor is user+foo broken
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# up into user and foo.
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#
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# Results are the same as with indexed file lookups.
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#
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# EXAMPLE
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# The following shows a generic mapping with an indexed
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# file. When mail is sent to a remote host via SMTP, this
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# replaces his@localdomain.local by his ISP mail address,
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# replaces her@localdomain.local by her ISP mail address,
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# and replaces other local addresses by his ISP account,
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# with an address extension of +local (this example assumes
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# that the ISP supports "+" style address extensions).
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#
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# /etc/postfix/main.cf:
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# smtp_generic_maps = hash:/etc/postfix/generic
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#
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# /etc/postfix/generic:
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# his@localdomain.local hisaccount@hisisp.example
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# her@localdomain.local heraccount@herisp.example
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# @localdomain.local hisaccount+local@hisisp.example
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#
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# Execute the command "postmap /etc/postfix/generic" when-
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# ever the table is changed. Instead of hash, some systems
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# use dbm database files. To find out what tables your sys-
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# tem supports use the command "postconf -m".
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#
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# BUGS
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# The table format does not understand quoting conventions.
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#
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# CONFIGURATION PARAMETERS
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# The following main.cf parameters are especially relevant.
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# The text below provides only a parameter summary. See
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# postconf(5) for more details including examples.
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#
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# smtp_generic_maps
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# Address mapping lookup table for envelope and
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# header sender and recipient addresses while deliv-
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# ering mail via SMTP.
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#
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# propagate_unmatched_extensions
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# A list of address rewriting or forwarding mecha-
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# nisms that propagate an address extension from the
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# original address to the result. Specify zero or
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# more of canonical, virtual, alias, forward,
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# include, or generic.
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#
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# Other parameters of interest:
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#
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# inet_interfaces
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# The network interface addresses that this system
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# receives mail on. You need to stop and start Post-
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# fix when this parameter changes.
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#
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# proxy_interfaces
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# Other interfaces that this machine receives mail on
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# by way of a proxy agent or network address transla-
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# tor.
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#
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# mydestination
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# List of domains that this mail system considers
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# local.
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#
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# myorigin
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# The domain that is appended to locally-posted mail.
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#
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# owner_request_special
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# Give special treatment to owner-xxx and xxx-request
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# addresses.
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#
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# SEE ALSO
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# postmap(1), Postfix lookup table manager
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# postconf(5), configuration parameters
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# smtp(8), Postfix SMTP client
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#
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# README FILES
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# Use "postconf readme_directory" or "postconf html_direc-
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# tory" to locate this information.
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# ADDRESS_REWRITING_README, address rewriting guide
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# DATABASE_README, Postfix lookup table overview
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# STANDARD_CONFIGURATION_README, configuration examples
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#
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# LICENSE
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# The Secure Mailer license must be distributed with this
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# software.
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#
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# HISTORY
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# A genericstable feature appears in the Sendmail MTA.
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#
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# This feature is available in Postfix 2.2 and later.
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#
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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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# Wietse Venema
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# Google, Inc.
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# 111 8th Avenue
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# New York, NY 10011, USA
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#
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# GENERIC(5)
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