Header information
The header gives essential information about the message. In addition to the basic details shown in the sample, it may include:
c.c.
This stands for carbon copies, which means much the same as it does on a letter.
Remember: Don't use CC to all persons whom you know only concerned persons.
b.c.c.
This stands for blind carbon copies, which, you should use if you do not want the main recipient to know who has received copies.
Attachments
Icons of any attachments will appear here.
The amount of header information, and the order in which it appears, will vary according to the software being used.