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
-r Use a Postfix-internal protocol for reading the
message from standard input, and for reporting sta-
tus information on standard output. This is cur-
rently the only supported method.
-v Enable verbose logging for debugging purposes. Mul-
tiple -v options make the software increasingly
verbose. As of Postfix 2.3, this option is avail-
able for the super-user only.
The command is designed to run with set-group ID privi-
leges, so that it can write to the maildrop queue direc-
tory and so that it can connect to Postfix daemon pro-
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_config_directories
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 exam-
A list of non-default Postfix configuration direc-
tories that may be specified with "-c config_direc-
tory" on the command line, or via the MAIL_CONFIG
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
queue_directory (see 'postconf -d' output)
The location of the Postfix top-level queue direc-
The syslog facility of Postfix logging.
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) dae-
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 privi-
leged postdrop(1) helper command).
/var/spool/postfix/maildrop, maildrop queue
sendmail(1), compatibility interface
postconf(5), configuration parameters
syslogd(8), system logging
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