In the context of electronic mail, the acronym CCO stands for “Copia Carbon Oculta” in Spanish, which translates to “Blind Carbon Copy” in English. It designates a field in the email header where recipients can be added without their addresses being visible to other recipients. For example, when sending a newsletter to a large group of subscribers, placing the email addresses in the CCO field prevents each recipient from seeing the email addresses of all other subscribers.
The principal benefit of employing this method is to protect the privacy of email recipients. It prevents the inadvertent sharing of personal email addresses, mitigating the risk of spam or unwanted communications. Historically, this feature became essential as email communication became more widespread, and the need to control the distribution of email addresses became increasingly important for security and etiquette reasons. This functionality allows individuals or organizations to communicate with multiple recipients in a discreet manner.
