Manual Reference Pages - MTS.CONF (5)
mh-tailor, mts.conf - mail transport configuration for nmh message handler
/usr/local/etc/nmh/mts.conf defines run-time options for those
nmh programs which interact (in some form) with the message transport system.
At present, these (user) programs are:
Each option should be given on a single line. Blank lines and lines
which begin with # are ignored. The options available along with
default values and a description of their meanings are listed below:
The mail transport method to use. The three acceptable options are
smtp (which is the default),
If you use
smtp, this will enable a direct SMTP (simple mail transport
protocol) interface in
nmh. When sending mail, instead of passing the
message to the mail transport agent,
post will open a socket connection
to the mail port on the machine specified in the
If you use
post will send messages by forking a
local copy of
sendmail. It will still speak SMTP with this local copy of
sendmail. For backward compatibility,
sendmail/smtp can be abbreviated to
The third alternative,
sendmail/pipe, also forks a local copy of
sendmail but feeds the message directly to it, using
-t. This replaces the old, undocumented
spost mechanism and retains some of its limitations, such as lack of
support for the
-whom switch and
Dcc: header field.
nmh considers local. It should typically be a fully
qualified hostname. If this is not set, depending on the version of
UNIX youre running,
nmh will query the system for this value
(e.g. uname, gethostname, etc.), and attempt to fully qualify this
If you are using POP to retrieve new messages, you may want to set this
value to the name of the POP server, so that outgoing message appear to
have originated on the POP server.
If this is set, a . followed by this string will be appended to your
This should only be needed, if for some reason
nmh is not able to
fully qualify the hostname returned by the system (e.g. uname,
This option specifies the host name that
nmh will give in the
EHLO) command, when posting mail. If not
set, the default is to use the host name that
nmh considers local
localname above). If this option is set, but empty, no
HELO command will be given.
HELO command is required by RFC 821, many SMTP servers
do not require it. Early versions of
SendMail will fail if the hostname
given in the
HELO command is the local host. Later versions of
SendMail will complain if you omit the
HELO command. If you run
SendMail, find out what your system expects and set this field if needed.
This option is only used for UUCP mail. It specifies the name of the
local host in the UUCP domain. If not set, depending
on the version of UNIX youre running,
nmh will query the system
for this value. This has no equivalent in the
The directory where maildrops are kept. If this option is set, but empty,
the users home directory is used. This overrides the default value
chosen at the time of compilation.
The name of the maildrop file in the directory where maildrops are kept.
If this is empty, the users login name is used. This overrides the default
value (which is empty).
The beginning-of-message delimiter for maildrops.
The end-of-message delimiter for maildrops.
The locking algorithm to use when opening the maildrop. Can be any one of
fcntl dot flock lockf
The name of the system-wide default
for the details.
The highest user-id which should NOT receive mail addressed to
If set, then each user-id greater than everyone that has a
login shell equivalent to the given value (e.g., /bin/csh)
indicates that mail for everyone should not be sent to them.
This is useful for handling admin, dummy, and guest logins.
This option is only available if you set
A lists of hosts and networks which to look for SMTP servers when
posting non-local mail. It turns out this is a major win for hosts
which dont run an message transport system. The value of
servers should be one or more items. Each item is the name of a host which
is (hopefully) running a SMTP server.
This option is only available if you set
The pathname to the
Post Office Protocol
The name of the default POP service host. If this is not set, then
nmh looks in the standard maildrop areas for waiting mail, otherwise
the named POP service host is consulted.
A few words on locking:
nmh has two main uses for locking: locking the mail spool during mail
incorporation, and locking metadata files (sequence files, the context)
during updates. These locking methods can be configured separately
from each other.
For locking the mail spool, the
spoollocking entry in
will control the locking algorithm to use when
inc incorporates mail from the spool file. If no entry is given, a default
based on the operating system type will be chosen.
For locking all other files, the
datalocking entry in
controls the locking algorithm used for all other file access.
If no entry is given, the
fcntl lock method will be chosen.
If you do not wish to use kernel-based locking,
dot locking is an option available.
is not specified at build time, lock files will be created
in the directory where the file being locked resides. Otherwise, lock
files will be created in the directory specified by
Prior to installing
nmh, you should see how locking is done at
your site, and set the appropriate values.
^/usr/local/etc/nmh/mts.conf~^nmh mts configuration file
As listed above. The path of the mail transport configuration
file can be changed with the
MHMTSCONF environment variable and augmented with the
MHMTSUSERCONF environment variable, see mh-profile(5).
Failure to open any mail transport configuration file is silently
ignored. Therefore, its best to avoid dynamic creation of such
a file with the intent of use via the
MHMTSUSERCONF environment variables. If such use is necessary, the ability
to successfully open the file should first be verified.
|nmh-1.6 ||MH-TAILOR (5) ||December 8, 2013 |
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