Flagged mail means synonym

Some synonyms for "flagged mail" are:

1. Marked mail
2. Notified mail
3. Alerted mail
4. Highlighted mail
5. Tagged mail
6. Identified mail
7. Designated mail
8. Prioritized mail
9. Notified email
10. Urgent mail

Note that the term "flagged mail" is often used in the context of email or messaging systems, where a message is flagged or marked as important, urgent, or requiring attention.