Don't CC (carbon copy) more people than necessary. It's a waste of bandwidth and disrespectful to others' time.
http://www.shu.ac.uk/services/marketing/style...

If you mean to send them a copy of your e-mail, you can just use it as a verb, at least informally:

Be sure to cc all the managers.
Thanks for cc-ing me.

Ja das ist das schoene an Englisch, das "cc" tatsaechlich ein Verb sein kann. Aber wie sagt man es in der Vergangenheit? "I cced you?" Sieht ganz schoen Sch... aus.

Ich kenne: to copy someone in.