a split DNS setup.
What DNS software? ( but this is so easy to fix with hosts file)
My internal DNS has entries for the host names/ internalf IP's of each of the mail servers.
windows resolves via hosts and then DNS (Unix does, too). I never seen this fail and everybody uses it all the time to short-circuit DNS resolution.
Anyway, you didn't answer my question about what happens when you ping, traceroute, telnet:25 from each machine to the other's IP (not its hostname).
However, no other entries for those machines. What should my internal DNS look like in order to resolve my two external mx/A records.
If you use DNS to resolve, it's stupid simple. You set up the MX records for each domain to point to MX hostnames, and then put in A records in each exchange or imail zone:
in the exdomain.com zone:
mx.exdomain.com. A ip.ad.re.ss
in the imdomain.com. zone:
mx.imdomain.com. A ip.ad.re.ss
But in hosts file, the same thing:
ip.ad.re.ss mx.exdomain.com ip.ad.re.ss mx.imdomain.com
The hosts above asssumes Imail will find the above mx hostnames in DNS, then resolve them to A records in hosts file.
If you don't put MX records in DNS, Imail will try to send to the A record for @recipient.domain, so you would need to add A records to hosts file:
ip.ad.re.ss exdomain.com ip.ad.re.ss imdomain.com
where all the above IP addresses are the IPs of the Imail and Exchange boxes.
Len
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