postdrop - Postfix mail posting utility
postdrop [-rv] [-c config_dir]
The postdrop(1) command creates a file in the maildrop directory and copies its standard
input to the file.
The main.cf configuration file is in the named directory instead of the default
configuration directory. See also the MAIL_CONFIG environment setting below.
-r Use a Postfix-internal protocol for reading the message from standard input, and
for reporting status information on standard output. This is currently the only
-v Enable verbose logging for debugging purposes. Multiple -v options make the soft-
ware increasingly verbose. As of Postfix 2.3, this option is available for the
The command is designed to run with set-group ID privileges, so that it can write to the
maildrop queue directory and so that it can connect to Postfix daemon processes.
Fatal errors: malformed input, I/O error, out of memory. Problems are logged to syslogd(8)
and to the standard error stream. When the input is incomplete, or when the process
receives a HUP, INT, QUIT or TERM signal, the queue file is deleted.
Directory with the main.cf file. In order to avoid exploitation of set-group ID
privileges, a non-standard directory is allowed only if:
o The name is listed in the standard main.cf file with the alternate_con-
fig_directories configuration parameter.
o The command is invoked by the super-user.
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.
A list of non-default Postfix configuration directories that may be specified with
"-c config_directory" on the command line, or via the MAIL_CONFIG environment
config_directory (see 'postconf -d' output)
The default location of the Postfix main.cf and master.cf configuration files.
import_environment (see 'postconf -d' output)
The list of environment parameters that a Postfix process will import from a non-
Postfix parent process.
queue_directory (see 'postconf -d' output)
The location of the Postfix top-level queue directory.
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".
The time limit for sending a trigger to a Postfix daemon (for example, the
pickup(8) or qmgr(8) daemon).
Available in Postfix version 2.2 and later:
List of users who are authorized to submit mail with the sendmail(1) command (and
with the privileged postdrop(1) helper command).
/var/spool/postfix/maildrop, maildrop queue
sendmail(1), compatibility interface
postconf(5), configuration parameters
syslogd(8), system logging
The Secure Mailer license must be distributed with this software.
IBM T.J. Watson Research
P.O. Box 704
Yorktown Heights, NY 10598, USA