Here is step-by-step how to block email address (sender) in either Windows Live Hotmail or MSN Hotmail at below. I hope it helps!
Block an Email Address in Windows Live HotmailTo add a sender to your Windows Live Hotmail blocked senders list:
- Select Options | More Options, (or just Options if no menu comes up) from the Windows Live Hotmail toolbar.
- Follow the Safe and blocked senders link under Junk e-mail.
- Now click Blocked senders.
- Type the undesired email address under Blocked e-mail address or domain:
- You can block all addresses at a domain — the domain being what comes after the '@' sign in an email address — by entering just that.
- Click Add to list >>.
Block a Sender by Email Address in MSN HotmailTo block mail from an email address in Hotmail:
- Select Options from the main Hotmail navigation bar.
- Make sure the Mail category is selected.
- Follow the Junk E-Mail Protection.
- Click Block Senders.
- Now type the address you want to block in the single entry field on the left.
- Click Add >>.
- Now click OK.