To prevent everyone's address from appearing in everyone else's email

1.
Open +
2.
From the Mail menu, choose “Preferences….”
3.
Click the “Composing” icon.
4.
Uncheck the box, “When sending to a group, show all member addresses.”

Get Mac OS X 10.4 Tiger: Peachpit Learning Series now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.