Block outgoing mail to a domain

[JuanCar]

Well, I have a problem with Hotmail, and, as a good Microsfot service, they don't give me data enough to fix it. Email blacklisted in Hotmail is blocked for eternity, and they don´t allow me to fix it.
So, I want to block all outgoing mails to Hotmail domain, is there any simple solution for doing that?
I have Hotmail blacklisted, and I want cut all trafic with this domain.
Thanks