lynx that is sending e-mail — it's
cron. This is a feature: by default, any output of cron jobs gets mailed to the owner of the crontab. You can find the documentation for this in
man 5 crontab, but in short, if you want to suppress all mailed output, set
MAILTO="" at the top of your crontab file. Alternately, you can suppress output from the individual jobs (in a per-command-specific way, like
grep --quiet if you happen to have grep commands in your crontab), or redirect the output elsewhere — to a log file, or just to
/dev/null. Or, you can pipe it to the
mail command, using
-s to give the mail a meaningful subject rather than the default (ugly) cron-output subject line.