copy of an email; CC; carbon copy
Wasei-eigo term used in email contexts to refer to a copy of a message, similar to CC or carbon copy. Common in Japanese business email.
wasei-eigo (Japanese-coined English), from copy mail
Please send a copy of this email to the boss as well.
Put my address in the CC.
Variant with interpunct; less common in practice.
Wasei-eigo from English 'copy' and 'mail'. The exact origin is uncertain, but it likely emerged in Japanese business email culture.