Sendmail Installation and Operation Guide
SMM:08-65
becomes disk-based. The default is 4096 bytes.
DeadLetterDrop=file
[no short name] Defines the location of the system-wide dead.letter file, formerly
hardcoded to /usr/tmp/dead.letter. If this option is not set (the default), sendmail
will not attempt to save to a system-wide dead.letter file in the event it cannot
bounce the mail to the user or postmaster. Instead, it will rename the qf file as it
has in the past when the dead.letter file could not be opened.
DefaultUser=user:group
[u] Set the default userid for mailers to user:group. If group is omitted and user is
a user name (as opposed to a numeric user id) the default group listed in the
/etc/passwd file for that user is used as the default group. Both user and group
may be numeric. Mailers without the S flag in the mailer definition will run as
this user. Defaults to 1:1. The value can also be given as a symbolic user name.
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DelayLA=LA
[no short name] When the system load average exceeds LA, sendmail will sleep
for one second on most SMTP commands and before accepting connections.
DeliverByMin=time
[0] Set minimum time for Deliver By SMTP Service Extension (RFC 2852). If 0,
no time is listed, if less than 0, the extension is not offered, if greater than 0, it is
listed as minimum time for the EHLO keyword DELIVERBY.
DeliveryMode=x [d] Deliver in mode x. Leg al modes are:
i
Deliver interactively (synchronously)
b
Deliver in background (asynchronously)
q
Just queue the message (deliver during queue run)
d
Defer delivery and all map lookups (deliver during queue run)
Defaults to ``b'' if no option is specified, ``i'' if it is specified but given no argu-
ment (i.e., ``Od'' is equivalent to ``Odi''). The -v command line flag sets this to i.
DialDelay=sleeptime
[no short name] Dial-on-demand network connections can see timeouts if a con-
nection is opened before the call is set up. If this is set to an interval and a con-
nection times out on the first connection being attempted sendmail will sleep for
this amount of time and try again. This should give your system time to establish
the connection to your service provider. Units default to seconds, so "DialDe-
lay=5" uses a five second delay. Defaults to zero (no retry). This delay only
applies to mailers which have the Z flag set.
DirectSubmissionModifiers=modifiers
Defines ${daemon_flags} for direct (command line) submissions. If not set,
${daemon_flags}
is either "CC f" if the option -G is used or "c u" otherwise.
Note that only the the "CC", "c", "f", and "u" flags are checked.
DontBlameSendmail=option,option,...
[no short name] In order to avoid possible cracking attempts caused by world- and
group-writable files and directories, sendmail does paranoid checking when open-
ing most of its support files. If for some reason you absolutely must run with, for
example, a group-writable /etc directory, then you will have to turn off this check-
ing (at the cost of making your system more vulnerable to attack). The possible
arguments have been described earlier. The details of these flags are described
above. Use of this option is not recommended.
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The old g option has been combined into the DefaultUser option.