I finally explained to him that the sheer volume of spam doesn't just
mean that costs of dealing with it have to be passed on, but that his
own Hotmail mailbox has a finite capacity beyond which correspondence
from his colleagues, family and friends would start bouncing due to the
mailbox already being full of spam. But when I sent him the email telling
him that, the email came bouncing back because...
Host 'mc3.law13.hotmail.com' says:
552 Requested mail action aborted: exceeded storage allocation