One of the difficulties we run into with MdF in general and greylisting in particular is that recipient address verification (via the access database) is delayed via delay_checks. So, basically we tempfail messages with invalid recipient addresses that we should reject outright at the HELO phase, and these messages will have to be bounced later if the sender retries. Further, if we're front-ending other servers, we may not even know whether the user address is valid.
But ... if the internal servers (including a dummy server on the relay box for access_db checks) supported VRFY, then MdF could check the addresses early on by first consulting the internal server(s). Make sense? _______________________________________________ NOTE: If there is a disclaimer or other legal boilerplate in the above message, it is NULL AND VOID. You may ignore it. Visit http://www.mimedefang.org and http://www.roaringpenguin.com MIMEDefang mailing list [email protected] http://lists.roaringpenguin.com/mailman/listinfo/mimedefang
