Missing Email Accounts

Went in to check on an email address this AM. IW reports that 4 of 10 email accounts in use, but bringing up the Email Management window only lists the postmaster account and no others. Where are the other three accounts? There are no aliases or groups.

Ideas?

Is it in a secondary domain on the same account?

No, secondaries only show their respective postmaster accounts.

Are there perhaps exactly three secondary accounts? Each has a postmaster account, for a total of 4?

Doh! Thanks!