I think he accidently put your name in the BCC space instead of the regular To: spot .. here is something I found,
Quote:
To send a copy of an Email to an individual, or list of individuals (individually, or a group list) where noone sees the recipient's name, you simply put the name(s) in the "Bcc:" line. The downside is that each recipient in the "Bcc:" line doesn't see his/her name either they only see the reference "Undisclosed Recipient". See the next step for further info on this.