Added bounce messages for improperly addressed emails and for emailsfrom unauthorized senders.Messages follow the qmail-send Bounce Messages Format (QDBMF)http://cr.yp.to/proto/qsbmf.txtAdded a notification_email_hold table to hold possible bounce messagesuntil they are accepted by the system.
Added a workaround for a bug in Tcl 8.3 on solaris that causes int() to throw an 'integer value too large to represent' error when used on negative decimal numbers