The “To:” and “CC:” fields
Often we get e-mails from folks who have added our e-mail addresses to their address book. That's generally fine, but when they expose their contacts’ addresses in the “To” or “CC” fields, they’re not protecting their contacts’ privacy and are opening them up to spam.
Those addresses get harvested or left in the e-mail message when forwarded, and then added to everyone else's mailing lists. Then their contacts get bombarded with more and more unsolicited e-mail.
Suppose someone has a bone to pick with one of the “advertised” contacts or with something included in the message? The results could be problematic. It's best to protect your address list like you would protect your friends’ cell phone numbers.
If you want (or better yet need) to send your e-mail to more than just one person, please address the e-mail to yourself. Put all other addresses in the "BCC:" (Blind Courtesy Copy) field, and show your contacts that you value their privacy, time and safety.
Use your e-mail software to create group addresses. This can help you manage bulk e-mail. Consult your manual or IT department for help.
Before forwarding an e-mail ensure the content meets your company’s user policies and double check to be certain the content is appropriate to the selected audience. In addition to protecting previous recipients’ and your own address list’s privacy, your recipients will find it helpful if you delete any useless e-junk that has accumulated over the ‘life’ of the message