Microsoft knows you're making throwaway e-mail accounts, and wants to
make that process easier.
Today, Hotmail is getting a new feature aimed at "e-mail enthusiasts,"
which lets anyone create multiple e-mail accounts that can be read,
replied to, and managed from their everyday e-mail inbox. These
additional e-mail addresses can be had in the same manner as signing
up for new accounts, but they require no extra log-ins or upkeep.
I've always pointed spam to my DNS domains to hotmail. What other use
is there for it? :-)