Use this class when you need to deal with group of addresses as with one unit.
The following paragraph is taken from RFC 2822 (Resnick), part 3.4:
«When it is desirable to treat several mailboxes as a single unit (i.e., in a distribution list), the group construct can be used. The group construct allows the sender to indicate a named group of recipients. This is done by giving a display name for the group... »
Don't use this class for management of sender and recipient header fields (From:, To:, CC: etc.). Use TElMailAddressList class for these purposes.