I would appreciate any donations. Wishlist or send e-mail type donations to maekawa AT daemon-systems.org.

Thank you.


POSTALIAS(1)                General Commands Manual               POSTALIAS(1)




NAME
       postalias - Postfix alias database maintenance

SYNOPSIS
       postalias [-Nfinoprsvw] [-c config_dir] [-d key] [-q key]
               [file_type:]file_name ...

DESCRIPTION
       The postalias(1) command creates or queries one or more Postfix alias
       databases, or updates an existing one. The input and output file
       formats are expected to be compatible with Sendmail version 8, and are
       expected to be suitable for the use as NIS alias maps.

       If the result files do not exist they will be created with the same
       group and other read permissions as their source file.

       While a database update is in progress, signal delivery is postponed,
       and an exclusive, advisory, lock is placed on the entire database, in
       order to avoid surprises in spectator processes.

       The format of Postfix alias input files is described in aliases(5).

       By default the lookup key is mapped to lowercase to make the lookups
       case insensitive; as of Postfix 2.3 this case folding happens only with
       tables whose lookup keys are fixed-case strings such as btree:, dbm: or
       hash:. With earlier versions, the lookup key is folded even with tables
       where a lookup field can match both upper and lower case text, such as
       regexp: and pcre:. This resulted in loss of information with $number
       substitutions.

       Options:

       -c config_dir
              Read the main.cf configuration file in the named directory
              instead of the default configuration directory.

       -d key Search the specified maps for key and remove one entry per map.
              The exit status is zero when the requested information was
              found.

              If a key value of - is specified, the program reads key values
              from the standard input stream. The exit status is zero when at
              least one of the requested keys was found.

       -f     Do not fold the lookup key to lower case while creating or
              querying a table.

              With Postfix version 2.3 and later, this option has no effect
              for regular expression tables. There, case folding is controlled
              by appending a flag to a pattern.

       -i     Incremental mode. Read entries from standard input and do not
              truncate an existing database. By default, postalias(1) creates
              a new database from the entries in file_name.

       -N     Include the terminating null character that terminates lookup
              keys and values. By default, postalias(1) does whatever is the
              default for the host operating system.

       -n     Don't include the terminating null character that terminates
              lookup keys and values. By default, postalias(1) does whatever
              is the default for the host operating system.

       -o     Do not release root privileges when processing a non-root input
              file. By default, postalias(1) drops root privileges and runs as
              the source file owner instead.

       -p     Do not inherit the file access permissions from the input file
              when creating a new file.  Instead, create a new file with
              default access permissions (mode 0644).

       -q key Search the specified maps for key and write the first value
              found to the standard output stream. The exit status is zero
              when the requested information was found.

              If a key value of - is specified, the program reads key values
              from the standard input stream and writes one line of key: value
              output for each key that was found. The exit status is zero when
              at least one of the requested keys was found.

       -r     When updating a table, do not complain about attempts to update
              existing entries, and make those updates anyway.

       -s     Retrieve all database elements, and write one line of key: value
              output for each element. The elements are printed in database
              order, which is not necessarily the same as the original input
              order.  This feature is available in Postfix version 2.2 and
              later, and is not available for all database types.

       -v     Enable verbose logging for debugging purposes. Multiple -v
              options make the software increasingly verbose.

       -w     When updating a table, do not complain about attempts to update
              existing entries, and ignore those attempts.

       Arguments:

       file_type
              The database type. To find out what types are supported, use the
              "postconf -m" command.

              The postalias(1) command can query any supported file type, but
              it can create only the following file types:

              btree  The output is a btree file, named file_name.db.  This is
                     available on systems with support for db databases.

              cdb    The output is one file named file_name.cdb.  This is
                     available on systems with support for cdb databases.

              dbm    The output consists of two files, named file_name.pag and
                     file_name.dir.  This is available on systems with support
                     for dbm databases.

              hash   The output is a hashed file, named file_name.db.  This is
                     available on systems with support for db databases.

              fail   A table that reliably fails all requests. The lookup
                     table name is used for logging only. This table exists to
                     simplify Postfix error tests.

              sdbm   The output consists of two files, named file_name.pag and
                     file_name.dir.  This is available on systems with support
                     for sdbm databases.

              When no file_type is specified, the software uses the database
              type specified via the default_database_type configuration
              parameter.  The default value for this parameter depends on the
              host environment.

       file_name
              The name of the alias database source file when creating a
              database.

DIAGNOSTICS
       Problems are logged to the standard error stream and to syslogd(8).  No
       output means that no problems were detected. Duplicate entries are
       skipped and are flagged with a warning.

       postalias(1) terminates with zero exit status in case of success
       (including successful "postalias -q" lookup) and terminates with non-
       zero exit status in case of failure.

ENVIRONMENT

       MAIL_CONFIG
              Directory with Postfix configuration files.

       MAIL_VERBOSE
              Enable verbose logging for debugging purposes.

CONFIGURATION PARAMETERS
       The following main.cf parameters are especially relevant to this
       program.

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

       alias_database (see 'postconf -d' output)
              The alias databases for local(8) delivery that are updated with
              "newaliases" or with "sendmail -bi".

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

       berkeley_db_create_buffer_size (16777216)
              The per-table I/O buffer size for programs that create Berkeley
              DB hash or btree tables.

       berkeley_db_read_buffer_size (131072)
              The per-table I/O buffer size for programs that read Berkeley DB
              hash or btree tables.

       default_database_type (see 'postconf -d' output)
              The default database type for use in newaliases(1), postalias(1)
              and postmap(1) commands.

       syslog_facility (mail)
              The syslog facility of Postfix logging.

       syslog_name (see 'postconf -d' output)
              The mail system name that is prepended to the process name in
              syslog records, so that "smtpd" becomes, for example,
              "postfix/smtpd".

STANDARDS
       RFC 822 (ARPA Internet Text Messages)

SEE ALSO
       aliases(5), format of alias database input file.
       local(8), Postfix local delivery agent.
       postconf(1), supported database types
       postconf(5), configuration parameters
       postmap(1), create/update/query lookup tables
       newaliases(1), Sendmail compatibility interface.
       syslogd(8), system logging

README FILES
       Use "postconf readme_directory" or "postconf html_directory" to locate
       this information.
       DATABASE_README, Postfix lookup table overview

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



                                                                  POSTALIAS(1)