Ok, i am using backupPC for backup machines, backuppc can send mail to one person, while i cannot get how to configure many users which seems kind of headache, i want to set a group with a mail so when i send to it it sends to all group members, can i do that using sendmail? again i want a group have a mail address so when i use this mail address in backuppc or whatever, this mail address resolved by sendmail to the group of people or multiple mail boxes, thanks.