MailItem.Sent Property (Outlook)
Returns a Boolean value that indicates if a message has been sent. Read-only.
Syntax
expression .Sent
expression A variable that represents a MailItem object.
Remarks
In general, there are three different kinds of messages: sent, posted, and saved. Sent messages are items sent to a recipient or public folder. Posted messages are created in a public folder. Saved messages are created and saved without either sending or posting.