Options can be set on the command line or in the configuration file.
The -d37.1 (a.k.a. -d37)
debugging switch allows you to watch each option being defined. As
each is processed, this message is first printed, without a trailing
newline:
setoption: name (char).sub =val
Here, name is the option's
multicharacter name, char is its
single-character equivalent (or a hexadecimal value if it is
non-ASCII), and sub is the subvalue for that
option if there was one. Finally, val is the
value being given to that option. If the option has already been set
from the command line and is thus prohibited from being set in the
configuration file, sendmail prints:
(ignored)
A newline is then printed, and the job is done. If defining the
option is permitted, sendmail next checks to see
whether it is safe (Section 24.2.4). If it is not,
sendmail prints:
(unsafe)
If it is unsafe, sendmail checks to see whether
it should relinquish its current privileges. If so, it prints:
(Resetting uid)
A newline is then printed, and the option has been defined.
The -d37.1 debugging switch also shows the
modifier flags set for each DaemonPortOptions
option. For example, consider the following:
setoption DaemonPortOptions (O)=Name=MTA
Daemon MTA flags:
setoption DaemonPortOptions (O)=Port=587, Name=MSA, M=E
Daemon MSA flags: NOETRN
The first setting of the DaemonPortOptions option
sets no modifier flags so the line following it shows no flags. The
second setting of the DaemonPortOptions option
sets the M=E modifier flag. The line following it
shows that that flag means to disallow ETRN. See DaemonPortOptions in Chapter 24 for the
meaning of the various possible modifier-flags.
