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Options can be overridden using the
-o or -O
command line flags. For example:
sendmail -oT2m
sets the T (timeout) option to two minutes
for this run only;
the equivalent line using the long option name is:
sendmail -OTimeout.queuereturn=2m
Some options have security implications. Sendmail allows you to set these, but relinquishes its setuid root permissions thereafter.