-b
Set operating mode All versions
The -b
switch tells
sendmail in what mode to
operate. For example, sendmail
can “become” a daemon listening for incoming SMTP
connections, or it can run in a mode that tells it
to simply print the contents of the queue and exit.
The form of the -b
switch is:
-bmode
If mode
is more than a
single letter, all but the first letter is silently
ignored. If the mode
is
missing or not one of those allowed,
sendmail prints the following
error message and exits:
Invalid operation mode bad letter here
If the -b
command-line switch is omitted altogether, the
default mode becomes -bm
(deliver mail and exit).
Beginning with V8.7 sendmail, the
letter that selected the operating mode is assigned
at startup to the ${opMode}
sendmail macro (${opMode}
on page 839).
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