Phone sometimes displays a sender name on a new email, and sometimes displays "3 new emails."

[alderash]

Phone sometimes displays a sender name on a new email, and sometimes displays "3 new emails."

Sometimes my phone displays the sender name on an incoming email in my notification bar, and sometimes it just says "3 new emails" or similar. This is specifically from an Exchange server from work. Is there a setting in the phone to not group incoming emails, but have every new email display the sender's name and maybe part of the message?