NAME

     table_passwd — format description for smtpd passwd tables

DESCRIPTION

     This manual page documents the file format of "passwd" tables used by the smtpd(8) mail daemon.

     The format described here applies to tables as defined in smtpd.conf(5).

PASSWD TABLE

     A "passwd" table stores information regarding local users.  The information is encoded using the
     traditional passwd(5) format and allows the sharing of a user database across different software supporting
     this format.

     The table is used by smtpd(8) when authenticating a user or when user information such as user-id or home
     directory is required for a delivery.

     A "passwd" table consists of a flat file containing the user entries, each one on a line by itself, with
     fields separated by a colon:

           gilles:*:1000:1000:Gilles:/home/gilles:/sbin/nologin
           eric:*:1001:1001:Eric:/home/eric:/sbin/nologin
           chl:*:1002:1002:Charles:/home/chl:/sbin/nologin

     Besides the first username field and depending on the table type, fields are optional and might be empty.
     The gecos and the shell field are not used and ignored.

     If the table is used for authentication, the second field should contain a password encrypted using the
     crypt(3) function.  Such passwords can be generated using the encrypt(1) utility or smtpctl(8) encrypt
     command.

     If the table is used for user information, user-id, group-id, and home directory fields are required.

     In favor of supporting shared authentication with the Dovecot Passwd-file format, extra fields after the
     last shell field are allowed (and ignored).

SEE ALSO

     passwd(5), smtpd.conf(5), smtpctl(8), smtpd(8)

HISTORY

     The first version of table_passwd was written in 2013.

AUTHORS

     table_passwd was initially written by Gilles Chehade <gilles@poolp.org> and further improved by Joerg Jung
     <jung@openbsd.org>.