Is That Email Just For Me?
2009 June 9
Here’s an easy method in Gmail to figure out if an email message was sent directly to you (to your address only), or was sent to you as part of a group or list of addresses.
Under Settings > General in Gmail, find the option for “Personal Level Indicators” and choose Show Indicators:

This will display a chevron symbol next to messages sent to your address as part of a list of addresses, and a double-chevron next to those messages sent only to your address:
