Section: User Commands (1)
Postfix mail posting utility
postdrop [-rv] [-c config_dir]
(1) command creates a file in the maildrop
directory and copies its standard input to the file.
- -c config_dir
The main.cf configuration file is in the named directory
instead of the default configuration directory. See also the
MAIL_CONFIG environment setting below.
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 supported method.
Enable verbose logging for debugging purposes. Multiple -v
options make the software increasingly verbose. As of Postfix 2.3,
this option is available for the super-user only.
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) or postlogd
(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
The name is listed in the standard main.cf file with the
alternate_config_directories configuration parameter.
The command is invoked by the super-user.
The following main.cf
parameters are especially relevant to
The text below provides only a parameter summary. See
(5) for more details including examples.
- alternate_config_directories (empty)
A list of non-default Postfix configuration directories that may
be specified with "-c config_directory" on the command line (in the
case of sendmail(1), with the "-C" option), or via the MAIL_CONFIG
- config_directory (see 'postconf -d' output)
The default location of the Postfix main.cf and master.cf
- import_environment (see 'postconf -d' output)
The list of environment parameters that a privileged Postfix
process will import from a non-Postfix parent process, or name=value
- queue_directory (see 'postconf -d' output)
The location of the Postfix top-level queue directory.
- syslog_facility (mail)
The syslog facility of Postfix logging.
- syslog_name (see 'postconf -d' output)
A prefix that is prepended to the process name in syslog
records, so that, for example, "smtpd" becomes "prefix/smtpd".
- trigger_timeout (10s)
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:
- authorized_submit_users (static:anyone)
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
postlogd(8), Postfix logging
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
111 8th Avenue
New York, NY 10011, USA