I have been trying to accept drops from Apple Mail which do supply data with type identifiers : com.apple.mail.email The problem is that even though the drop says it does contain items for com.apple.mail.email it does provide the items for com.apple.mail.email. Mail dropped from Microsoft Outlook however confirms to the protocols and returns the items for com.apple.mail.email Is this a known issue with Apple Mail and is there are reason for what seems to be a non-compliance to it own standards in Apple Mail?