The To property specifies the principal (To) recipients for the message.
Property To as String HRESULT get_To(BSTR* pVal); HRESULT put_To(BSTR Val);
This property is also available as the urn:schemas:mailheader:to and urn:schemas:httpmail:to fields.
The string in the To property can represent a single recipient or multiple recipients. For example, each of the following qualifies as a full messaging address:
"User Address" <email@example.com> <firstname.lastname@example.org> email@example.com
In lists with multiple recipients, addresses are separated by commas:
"User 1" <firstname.lastname@example.org>, email@example.com, <firstname.lastname@example.org>
A comma is not allowed in any part of a messaging address unless it is contained within quotation marks.
The default value of the To property is an empty string.