This is a windows 2k AD network using DNS I have external DNS running on windows 2k I have internal DNS running on windows 2k
both mail servers are using the int DNS as their primary NS?
I have added a hosts entry on both mail servers that point to the other using internal IP address to the "mail.respective_domain.com".
either use the int DNS or hosts, but not both, to resolve the mail server addresses.
Exchange server localhost name of exch1.mylocaldomain.local primary dns in IP config points to my local network's dns server
aka the internal DNS?
One of the mail domain's it serves is mail.erinhope.com (this is the mx and A record name on external DNS)
Exchange must also host mail domain erinhope.com, or are all the email addresses [EMAIL PROTECTED]
has hosts file entry of mail.erinhhope.com to local address (10.x.x.x)
the exchange machine need to find mail.aquesthosting.com and aquesthosting.com in its hosts file.
Imail server
localhost name of Imail.mylocaldomain.local
primary dns in IP config points to my local network's dns server
One of the mail domain's it server is mail.aquesthosting.com (this is the mx and A record name on external DNS)
has hosts file entry of mail.aquesthosting.com to local address (10.x.x.x)
Imail's hosts file need records for mail.erinhhope.com and erinhhope.com
My internal network DNS server as a forwarder set up for external DNS server of ISP. There is only one zone in my internal DNS server which is "mylocaldomain.local".
ok
There are no zones for aquesthosting or erinhope
so you have to resolve those two domains internal addresses in hosts files.
My external DNS servers are hosted by myself and have zones for both aquesthosting and erinhope. Both have MX and A for their respective "mail."
that's the outside, public view. we don't care about that for your internal problem.
I run all this behind an MS ISA firewall server
>From EXCHANGE server: Ping internal IP of Imail - good Ping network hostname of imail (Imail.mylocaldomain.local) - good Ping internet MX/A hostname of "mail.aquesthosting.com" - UNKNOWN host
Your internal DNS should forward that to your ISP DNS who should get the public (ie wrong, public) answer from your external DNS.
add mail.aquesthosting.com and aquesthosting.com internal IPs to Exchange's hosts file
Tracert INTERNAL IP of Imail - returns A record name of "mail.aquesthosting.com" [10.x.x.x] (not external IP)
...so exchange can connect to IP of imail
Tracert INTERNAL hostname of Imail "Imail.mylocaldomain.local" - returns A record name of "mail.aquesthosting.com" [10.x.x.x] (not external IP )
what?
telent to mail.aquesthosting.com:25 or 10.x.x.x:25 - both return "could not open connection to host"
there is your problem. Why can't the exchange box telnet to Imail's int IP:25.
>From IMAIL server:
Ping internal IP of Exchange - good
Ping network hostname of Exchange (exch1.mylocaldomain.local) - good
Ping Internet MX/A hostname of "mail.erinhope.com" - returns internal IP of Exchange server (10.x.x.x)
Tracert Internal IP of Exchange - returns A record dnam of "mail.erinhope.com" [10.x.x.x] (not external IP)
Tracert Internal hostname of Exchange "exch1.mylocaldomain.com" - returns A record name of "mail.erinhope.com" [10.x.x.x] (not external IP)
telent to mail.erinhope.com:25 or 10.x.x.x:25 - both return "cold not open connection to host"
again, same as above.
Since you can ping and traceroute from each to the other, but just can't TCP to port 25, its sounds like a firewall policy or packet filtering rule blocking access to port 25.
Len
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