If you’ve stopped receiving mail from some domain using Hotmail account, that domain is probably blacklisted in your account configuration. I’ve though that this can’t be done if you don’t select the specified domain as ‘junk’.
Unfortunately, it happened automatically for one domain, from which I was receiving a lot of valid mails.
Here’s how to check it:
Open your Windows Live Mail (Hotmail)
In the upper right corner click ‘Options‘ and then hit ‘More Options‘.
Under ‘Junk e-mail’ clik on ‘Safe and blocked senders’
Now click ‘blocked senders‘ link
Find the blocked domain in the ‘Blocked senders’, select it and click ‘Remove from list’ button.
You should start receiving mails again.
If you want, you can add it to safe senders list, just to make sure this doesn’t happen again 🙂