The sendmail program offers a verbose mode of
operation. In this "blow-by-blow"
mode, a description of all the sendmail
program's actions is printed to the standard output.
This mode is valuable in running sendmail
interactively but must not be used when running in daemon mode.
Consequently, you should never set this option in the
sendmail.cf file. Instead, you should set it
from the command line using the -v command-line
After the sendmail.cf file is parsed and the
command-line arguments have been processed,
sendmail checks to see whether it is in verbose
mode. If it is, it sets the HoldExpensive option
(don't connect to expensive mailers, HoldExpensive) to false and sets the
DeliveryMode option (DeliveryMode)
The forms of the Verbose option are as follows:
-v command-line shorthand
O Verbose=bool configuration file (V8.7 and later)
-OVerbose=bool command line (V8.7 and later)
Ovbool configuration file (deprecated)
-ovbool command line (deprecated)
The argument bool is of type
Boolean. If it is missing, the default value is
true (be verbose). If the entire option is missing, the default value
is false (be quiet).
Note that setting restrictexpand (See this section), with the PrivacyOptions
option, disables this Verbose option.
The Verbose option is safe. When it is specified
from the command line, sendmail retains its
special privileges. Note that the Verbose option
should never be set in the configuration file.