5. The method as recited in claim 4 , wherein the act of adding protocol specific data fields from at least one protocol specific extension schema to the single message item itself comprises an act of adding protocol specific data fields from an NNTP protocol extension from an electronic mail NNTP extension schema to the single message item, in addition to the protocol specific data fields previously added from the POP3 protocol extension.
4. The method as recited in claim 2 , wherein the act of adding protocol specific data fields from at least one protocol specific extension schema to the single message item itself comprises an act of adding protocol specific data fields from a POP3 protocol extension to the single message item, the POP3 protocol extension from an electronic mail POP3 extension schema.