请回信后转发给某人

I agree with Leon. Please reply and send a copy to sb.=Please reply and cc to sb.=请回复（邮件）并抄送给sb.

I have other idea about fdmaxie's question and the answers, for what maxie wanted the reciever to copy to another was not specific. Was the copy to involve maxie's original email, or the reciever's reply , or both of them? In the first case, he should 转发(forward) the original email; in the latter 2 cases, he would 发送（send, 发送is a general term for 'send （mostly used for), forward, and reply ) or 抄送（make a copy for,carbon copy) the reply or along with maxie's original email to the other one. 抄送 is used only when the copy is sent at the same time to both maxie and the other reciver. Again, 抄送 is not an everyday word, it is usually used only in official documents.

The Best Answer is wrong, and the answer which was created by zh369ao is right but not graceful.

Dear Fdmaxey, the following answers all are right, but they are not professional in formal Mandarin, in fact the Best Answer which you chose is not most exactly among all answers. The professional word for mail 抄送（make a copy for; send a duplicate to）. for English "CC"(carbon copy), please reply and c.c. to sb. so it can be expressed as below: 请回复邮件并抄送给somebody.