- is automatically set based on the status of the email address (unverified, temporary unusable or inexistent)
- can be also set by the school admin, for example by "freezing" an account
The user account status icons and their meaning
- a skull icon - the email address is invalid, such mailbox does not exist
- a yellow triangle - the email address may exist but messages cannot be delivered by the intended recipient, typically a temporary problem as as mailbox full, for example.