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# postdrop - Unix, Linux Command

# NAME

postdrop - Postfix mail posting utility

# SYNOPSIS

    postdrop [-rv] [-c config_dir]

# DESCRIPTION

The postdrop(1) command creates a file in the maildrop directory and copies its standard input to the file.

Options:

Tag | Description
--- | ---
-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.
-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 supported method.
-v | 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.

# SECURITY

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.

# DIAGNOSTICS

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.

# ENVIRONMENT

Tag | Description
--- | ---
MAIL_CONFIG | Directory with the main.cf file. In order to avoid exploitation of set-group ID privileges, a non-standard directory is allowed only if:

Tag | Description
--- | ---
o | The name is listed in the standard main.cf file with the alternate_config_directories configuration parameter.
o | The command is invoked by the super-user.

# 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.

Tag | Description
--- | ---
alternate_config_directories (empty) | 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 parameter.
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.
syslog_facility (mail) | The syslog facility of Postfix logging.
syslog_name (postfix) | The mail system name that is prepended to the process name in syslog records, so that "smtpd" becomes, for example, "postfix/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).

# FILES

    /var/spool/postfix/maildrop, maildrop queue

# SEE ALSO

    sendmail(1), compatibility interface
    postconf(5), configuration parameters
    syslogd(8), system logging

# 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

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