Discreet way to be included on an email, for short

• Private email attachment, briefly
• Send to secretly, in a way
• Private attachment, briefly
• Letters in front of an e-mail address
• Secretly keep in the email loop, briefly
• Discreetly include on an email: Abbr
• Include covertly in an email
• Discreet email option
• Covertly add to an email

Wiktionary Word definitions in Wiktionary
init. 1 body-centered cubic 2 blind carbon copy vb. to send something by blind carbon copy