Back in college every student had some Microsoft email account. When a certain amount of storage was full you'd get spammed daily with "your storage is full" me

Back in college every student had some Microsoft email account. When a certain amount of storage was full you'd get spammed daily with "your storage is full" messages and because Microsoft's own emails were whitelisted they'd go over the storage limit of the mail account. But 100000 emails is another order of magnitude.