Debugging with -d
It is best to debug
in a window environment,
(1), or something
similar. Debugging output can run to many screens.
Activities of the daemon can be observed only if the
debugging switch is combined with the others selected. This switch prevents
the daemon from disconnecting from the controlling terminal. Without
silently discards its debugging output.
Sometimes debugging output seems not to be printed:
/usr/lib/sendmail -d11.1 you < /dev/null
When this happens, add the
command line switch to
keep the output attached to your screen:
/usr/lib/sendmail -v -d11.1 you < /dev/null
many lines of output here
There must be no space between the
and its numeric
arguments. If you put space there, the numeric arguments may
be interpreted as recipient addresses.