For the past 12 years, I have sent emails to an organization I belong to that has about 110 people.  I never had problems sending emails to any of them while I was on Hotmail.  A week or so ago, I sent (on Outlook), I received a delivery notification on 8 of them.  “Your message couldn’t be delivered to the following recipients:  reason:  over quota.”  Several days later, I sent another e-mail.  The exact same 8 recipients were returned!  Today I sent a single e-mail to one of those 8 whose eimail had been returned, and it was returned: over quota.  What’s going on?