Flags is a
TIdMessageFlagsSet property that represents state, visibility, and persistence information about a message. Flags can used with components and protocols which provide access to and manuipulation of a mailbox address like
TIdPOP3, TTIdIMAP4,
TIdPOP3Server, and TIdIMP4Server, or TIdMailbox.
Flags may contain one or more of the enumerated values in TIdMessageFlags.