Hi jr. This "no hotmail.com" accounts deal was only impacting new registrants, but spammers got around it so it isn't even an issue anymore.
But hotmail.com is one of the email services that seems to mark us as spam, since our forum generates a lot of email notifications like the alerts. So I would not recommend hotmail for I_T's forum thread alerts. If you must use hotmail, you might consider using gmail and use their filters to forward the alerts to your hotmail account. See FAQ #4 on this page for more info. TSP Talk FAQ - Email Alerts
But hotmail.com is one of the email services that seems to mark us as spam, since our forum generates a lot of email notifications like the alerts. So I would not recommend hotmail for I_T's forum thread alerts. If you must use hotmail, you might consider using gmail and use their filters to forward the alerts to your hotmail account. See FAQ #4 on this page for more info. TSP Talk FAQ - Email Alerts