"at" command and mail

[Brett Glass]

I'm setting up a FreeBSD appliance that won't be running a mail 
daemon. I'd like the at(8) command to be there for scheduling of 
commands, but do not see any way to prevent it from trying to send 
mail after it executes a command. (There's not even a command line 
option that says "do not mail," or at least I can't find one.) Am I 
missing something, or does at(8) always expect to be able to send 
mail? If so, would it be worth implementing an atrun.conf 
configuration file that makes it optional and possibly sets other 
defaults for at(8)?

--Brett Glass