Re: Can you ever reject mail based on RFC2821 MAIL FROM?

>  So, I would like to propose a challenge to the MAIL FROM advocates: 
I wouldn't consider myself an "advocate" but...

publisher says something like: 

"mydomain.example.com: only nnn.nnn.nnn.nnn applies_to 'MAIL FROM'
# we know this means our mail might not be forwarded
# but we're OK with that. 
# And indeed, we're sure that our recipients are OK with that.
# Besides, it makes our stupid email disclaimers slightly
# less stupid
"    
Now, *you* tell me what's wrong with that.