RFC 2060 IMAP version 4rev1
RFC 2183 Content-Disposition MIME header
RFC 2195 IMAP/POP AUTHorize Extension for Simple Challenge/Response
RFC 2060 IMAP version 4rev1
RFC 2183 Content-Disposition MIME header
RFC 2195 IMAP/POP AUTHorize Extension for Simple Challenge/Response