TIdMessageFlags is an enumerated type that represents the valid values that can be assigned to the TIdMessageFlagsSet in the TIdMessage.Flags property. TIdMessageFlags can gave the following values:
mfAnswered - A reply has been sent for the Message.
mfFlagged - The watch falg has been set for a Message or Message Thread.
mfDeleted - Message has been deleted in the Mailbox.
mfDraft - The Message is a draft and has not been sent.
mfSeen - The message has not been retrieved and read by the mail client.
mfRecent - The message has been added to the mailbox since the last time it was accessed.