Thank you! They aren't even going to junk mail. I know I rarely post, but the EvC emails are great reminders. I thought perhaps I had changed a setting somewhere that I couldn't find, and would be an easy fix.
Figured it out. An evcforum.net email account was compromised and used to send spam, which I've now fixed. Hotmail.com/Outlook.com email uses a scoring system to blacklist domains, and right now the score is too low to apply for reinstatement. Hopefully the score will recover quickly, then I'll apply.
Score just today popped way up into the acceptable range, so I've applied to hotmail for reinstatement. Hotmail and outlook.com are actually the same email service, so both were affected, and I've applied to outlook.com for reinstatement, too. I'm not sure how long it will take, hopefully not too long.