+.sh 2 "Quick Configuration Startup"
+.pp
+A fast version of the configuration file
+may be set up by using the
+.b \-Z
+flag:
+.(b
+/usr/lib/sendmail \-Z
+.)b
+This creates the file
+.i /usr/lib/sendmail.fc .
+This file is an image of
+.i sendmail 's
+data space after reading in the configuration file.
+If this file exists,
+it is used instead of
+.i /usr/lib/sendmail.cf
+and must be rebuilt every time
+.i sendmail.cf
+is changed.
+.pp
+This file will be ignored
+if a
+.b \-C
+flag is specified
+or if sendmail detects that it is out of date.
+However, the heuristics are not strong
+so this should not be trusted.