A message sent with high importance displays a red dot in the message header.

High Importance

A designation used in communications, such as email, to indicate that the message requires urgent attention or prioritization.

Red Dot

Often indicates notifications or alerts in applications and websites, signaling new activity or the presence of something requiring attention.

Message Header

The section of an email or other message that contains the sender's and recipient's information, subject, and other data, but not the body content.