Scheduled backup disable backup of mailboxes.

Hello.

I've been using the Schedule Backups feature of virtualmin, and it works great. But I don't want to backup the users mail messages. It would be nice to backup mail configuration, but not the messages. I allow 10G of storage space to each user, and I use a remote FTP server to store the backup, so backup size is an issue.

So I 'd like to have a full backup containing the mail messages once a week, and daily backup of only website/database contents and configurations (not email messages). How can I do that?

Thanks

Rogerio