[Wolves] sudoers file

[SimonB]

Hiya,
I'm looking through my sudoers file and i'm trying to set flags in it, i 
know it can be done as i read man sudoers several times now, but it 
doesnt  tell me hwo to implement these flags.

I dont mean things like 'sudo -v', but more like say i want to switch on 
the mail_no_user flag in the /etc/sudoers file.

I'm a basic sudoer, i much rather stick to 'su -c', but as times change 
so do my needs, heh.

Does anyone know how to set such flags? as im clueless. :(