Comment # 3 on bug 919687 from Sebastian Freundt

Mail delivery is set up and works.  As Per Jessen suggests commands producing
output will result in a mail from cron.

I'm particularly annoyed about the line in crontab(5):

In addition to LOGNAME, HOME, and SHELL, cron(8) looks at the MAILTO variable
if a mail needs to be send as a result of running any commands in that
particular crontab.

Nowhere in the manpage is clarified what "if a mail needs to be sent" actually
means.  I had to resort to the source code and to my surprise, Per Jessen is
right.

Other crons and systems get it right, fcron clearly documents that mails for
scripts terminating with rc != 0 are sent.  HP-UX's cron sends a mail every
time with the rc value, regardless of output and "warns" about the fact that
any output by the script is included.