This HTML5 document contains 4 embedded RDF statements represented using HTML+Microdata notation.

The embedded RDF content will be recognized by any processor of HTML5 Microdata.

PrefixNamespace IRI
isaphttp://webisa.webdatacommons.org/prov/
isahttp://webisa.webdatacommons.org/
rdfhttp://www.w3.org/1999/02/22-rdf-syntax-ns#
n4thecodingforums.
provhttp://www.w3.org/ns/prov#
xsdhhttp://www.w3.org/2001/XMLSchema#
Subject Item
isa:241591747
rdf:type
prov:Entity
prov:value
However, if the user's Outlook connects to a mail server, such as Exchange, you could have your ASP.NET code to get that kind of information directly from Exchange server.
prov:wasQuotedFrom
n4:com
Subject Item
isap:484769587
prov:wasDerivedFrom
isa:241591747