>Is it possible for postfix to read a database of dynamic ip address and >relay for them? The ip pool would be in our radius accounting log.
can you have radius log to the imgate machine? the adapt the pop-before-smtp script to add those IPs to the pop-before-smtp.db file or have a script that is a "log client" that get info from the radius log and sends to the sysogd port of IMGate check the postfix.org site or google Len
