  Spam Control Configurations
  Cristiano Otto Von Trompczynski


     TTrraannssppoorrtt mmaappss
        The "Transport maps" option specifies optional tables with
        domain to (transport, nexthop) mappings. See transport(5) for
        syntax details.

        By default, this feature is disabled. Specify the types of
        databases to use. This option sets the "transport_maps" postfix
        variable.


     RReellooccaatteedd mmaappss
        The "Relocated maps" option  specifies optional lookup tables
        with new contact information for users or even domains that no
        longer exist.

        By default, this feature is disabled.

        If you use this feature, run "postmap /etc/postfix/relocated" to
        build the necessary DBM or DB file after change, then "postfix
        reload" to make the changes visible.  This option sets the
        "relocated_maps" postfix variable.


     VViirrttuuaall mmaappss
        The "Virtual maps" option specifies optional lookup tables to
        redirect specific addresses or even complete domains to another
        address. This is typically used to implement virtual domain
        support.

        By default, no address redirection is done. This option sets the
        "virtual_maps" postfix variable.


     CCaannoonniiccaall mmaappss
        The "Canonical maps" option specifies optional address mapping
        lookup tables. The mapping is applied to both sender and
        recipient addresses, in both envelopes and in headers. This is
        typically used to clean up dirty addresses from legacy mail
        systems, or to replace login names by Firstname.Lastname. See
        canonical(5) for details.

        By default, no canonical address mapping is done. This option
        sets the "canonical_maps" postfix variable.


     RReecciippiieenntt ccaannoonniiccaall mmaappss
        The "Recipient canonical maps" option specifies optional address
        mapping lookup tables for envelope and header RECIPIENT
        addresses.

        By default, no recipient-only address mapping is done.

        "Recipient canonical maps" is used before "Canonical maps"
        lookups.  This option sets the "recipient_canonical_maps"
        postfix variable.


     SSeennddeerr ccaannoonniiccaall mmaappss
        The "Sender canonical maps" option optional address mapping
        lookup tables for envelope and header SENDER addresses.
        For example, you want to rewrite the SENDER address
        user@ugly.domain to user@pretty.domain, while still being able
        to send mail to the RECIPIENT address user@ugly.domain.

        By default, no sender-only address mapping is done.

        "Sender canonical maps" is used before "Canonical maps" lookups.
        This option sets the "sender_canonical_maps" postfix variable.


     AAlliiaass mmaappss
        The "Alias maps" option specifies the list of alias databases
        used by the local delivery agent. The default list is system
        dependent.  On systems with NIS, the default is to search the
        local alias database, then the NIS alias database. See
        aliases(5) for syntax details.  This option sets the
        "alias_maps" postfix variable.


     AAlliiaass ddaattaabbaassee
        The "Alias database" option specifies the alias database(s) that
        are built with "newaliases" or "sendmail -bi".  This is a
        separate configuration parameter, because alias_maps (see above)
        may specify tables that are not necessarily all under control by
        Postfix.  This option sets the "alias_database" postfix
        variable.