Sun Java System Messaging Server 6 2005Q4 MTA Developer's Reference

MTA_CC

Specify a carbon copy (Cc:) address. The item_address and item_length fields specify the address and length of a string containing a Cc: address. The length of the address may not exceed ALFA_SIZE bytes.

MTA_CC is used to specify a Cc: address that should appear in both the message’s header and envelope.