> There is nothing you can do which would achieve this, because > packets to the ISDN address are going to get routed on the > Internet to the small ISP, not to Telstra. You cannot change > that from your position on the end of either of the links.
Futhermore, you can't "own" any amount smaller than a /24 (256 IPs). Anything smaller than that is part of the IP space "owned" by a larger provider. And even then a /24 may still be part of a non-portable provider address block, and owned by the larger provider. (and to be even more pedantic, you can't ever "own" IPs - they're not something which can be sold, owned, etc, due to the terms under which they are offered. APNIC "provides" IP addresses to the Asia-Pacific Internet community.) If you're dhcp'ing from Telstra, you're on a home service. SMTP (which requires a static IP) is something supported on a business service. Solution 1: buy a business service, for example a Pacific Internet DSL service [shameless plug - can you guess where I work?] :-) Solution 2: don't use SMTP. use UUCP, POP, IMAP, some form of e-mail outsourcing, etc. David.
