I looking for a mode to achieve a particular mode od send mail. I would send a mail with a "special" mail address (for example the group name
Backup@domain.com) and I would that the server automatically add the members mails as BCC of the message (so the message is sent from
backup@domain.com to one or more destination address and automatically this mail is sent via BCC to user A,B and C that are members of the backup group).