My wife uses Mac mail to access her iCloud account along with some other addresses like gmail. Any mail sent to her via iCloud shows her name as Jane Smith (PBL). In searching online all we can find about PBL is a reference to a public black list in Spam Haus. When we look at the raw email headers, there is no PBL in the headers. We can't figure out where the PBL is being appended to her name. Any ideas of where to check? The PBL suffix doesn't show on any other email addresses.