POSTDROP(1) POSTDROP(1)
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:
-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) 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.
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:
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 pro-
gram. The text below provides only a parameter summary. See post-
conf(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 environment parameter.
config_directory (see 'postconf -d' output)
The default location of the Postfix main.cf and master.cf con-
figuration files.
import_environment (see 'postconf -d' output)
The list of environment variables that a privileged Postfix
process will import from a non-Postfix parent process, or
name=value environment overrides.
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 send-
mail(1) command (and with the privileged postdrop(1) helper com-
mand).
Available in Postfix version 3.6 and later:
local_login_sender_maps (static:*)
A list of lookup tables that are searched by the UNIX login
name, and that return a list of allowed envelope sender patterns
separated by space or comma.
empty_address_local_login_sender_maps_lookup_key (<>)
The lookup key to be used in local_login_sender_maps tables,
instead of the null sender address.
recipient_delimiter (empty)
The set of characters that can separate an email address local-
part, user name, or a .forward file name from its extension.
FILES
/var/spool/postfix/maildrop, maildrop queue
SEE ALSO
sendmail(1), compatibility interface
postconf(5), configuration parameters
postlogd(8), Postfix logging
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
Wietse Venema
Google, Inc.
111 8th Avenue
New York, NY 10011, USA
POSTDROP(1)