Useful links
How to send a meeting request by using WebDAV
http://support.microsoft.com/default.aspx?scid=kb;EN-US;q308373
WebDAV How, What and Problems...
http://weblogs.sqlteam.com/mladenp/articles/9560.aspx
Mapping PR_MESSAGE_CLASS to DAV:contentclass
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wss/wss/_exchsv2k_mapping_pr_message_class_to_dav_contentclass.asp
Detect Undeliverable Email using WebDAV?
http://www.ureader.com/message/1006603.aspx
Reading extended properties from NDRs (Report.IPM.Note.NDR)
http://groups.google.es/group/microsoft.public.outlook.program_vba/browse_thread/thread/e80e67b606fbbe20/42995f24d2f93719?lnk=st&q=REPORT.IPM.Note.NDR&rnum=1&hl=es#42995f24d2f93719
Differences between CDO, Simple MAPI, and Extended MAPI
http://support.microsoft.com/?scid=kb%3Ben-us%3B200018&x=10&y=13
Properties of Non-Delivery Report
http://groups.google.es/group/microsoft.public.exchange.applications/browse_thread/thread/ec08803f07acb34b/a8d258338498ec29?lnk=st&q=REPORT.IPM.Note.NDR&rnum=17&hl=es#a8d258338498ec29
WebDAV - Undeliverable emails
http://groups.google.es/group/microsoft.public.exchange.applications/browse_thread/thread/1da744d3109f6c4e/52c4b842695e550b?lnk=st&q=webdav+REPORT.IPM.Note.NDR&rnum=2&hl=es#52c4b842695e550b
MIME (Multipurpose Internet Mail Extensions) 1521
http://www.freesoft.org/CIE/RFC/1521/