how to change daily cron emails to go to user account instead of root

[Ernie Luzar]

Руслан Бурханов wrote:
> man cron
>
>      -m mailto
>              Overrides the default recipient for cron mail.  Each 
> crontab(5)
>              without MAILTO explicitly set will send mail to the 
> mailto mail‐
>              box.  Sending mail will be disabled by default if mailto 
> set to a
>              null string, usually specified in a shell as '' or "".
>
> So you just can add this option on cron flags from rc.conf, like:
>
> cron_flags="-m 'root at mymail.com <mailto:root at mymail.com>'"
>
> and restart cron daemon. 
>
snip

This method seemed the simplest so I gave it a try.
The host has a user account called bob. I want  all cron email to go to 
bob and not root.
I use postfix and sendmail is disabled.

I put   cron_flags="-m bob"     in /etc/rc.conf and rebooted the host. 
Next morning the daily cron email still went to root.

1. Is there a way to scan rc.conf to verify all the included options are 
valid and accepted?
2. Since root and bob are on the same host is @mydomain really required?
3. Any ideas why it did not work and no errors were generated?