My cron jobs are trying to mail their results using the local mail feature of Ubuntu (not internet email, the kind of mail you can read with mutt). However, /var/log/syslog reports
/USR/SBIN/CRON: (speedtax) MAIL (mailed 52 bytes of output but got status 0x0006 )
I would like to setup local mail (so that cron can deliver the output successfully) but do not want to setup internet email. Everything I find on google is about the latter.