of the mailstats program's
output can be made more program-friendly with the use of the
-p command-line switch described earlier. One
drawback of using the -p command-line switch is
that it both prints and zeros the statistics.
Beginning with V8.12 sendmail, it is possible to
print in program-friendly form (as with -p), but
not zero the statistics. This is done with the -P
command-line switch. This switch is identical in all respects to the
-p, but it does not zero the statistics.