Name
-b
Synopsis
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}).
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