## 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:

\fB-c \fIconfig_dir\fR

The main.cf configuration file is in the named directory instead of the default configuration directory. See also the MAIL_CONFIG environment setting below.

\fB-r\fR

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.

\fB-v\fR

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

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:

\(bu

The name is listed in the standard main.cf file with the alternate_config_directories configuration parameter.

\(bu

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.

\fBalternate_config_directories (empty)\fR

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.

\fBconfig_directory (see 'postconf -d' output)\fR

The default location of the Postfix main.cf and master.cf configuration files.

\fBimport_environment (see 'postconf -d' output)\fR

The list of environment parameters that a Postfix process will import from a non-Postfix parent process.

\fBqueue_directory (see 'postconf -d' output)\fR

The location of the Postfix top-level queue directory.

\fBsyslog_facility (mail)\fR

The syslog facility of Postfix logging.

\fBsyslog_name (see 'postconf -d' output)\fR

The mail system name that is prepended to the process name in syslog records, so that "smtpd" becomes, for example, "postfix/smtpd".

\fBtrigger_timeout (10s)\fR

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:

\fBauthorized_submit_users (static:anyone)\fR

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