I got a block of 5 public static IP addresses from Uverse and want to experience with EX2k3.
I did install Exchange 2k3 on a win 2k3 std server and it is working behind a NAT firewall. I’ve changed the host A and MX records to point to my adress.
A host A record = 126.96.36.199
A MX record = ex2k3.vnworld.com points back to the host A record from ISP.
Internal mail routing (in local domain) = no problem
Here is the fun part:
– At first, I was not able to send out emails to external domains, but I can receive it from external domains (gmail, yahoo, ..etc).
I have SMTP virtual and the connectors setup in ex2k3.
I called AT&T and asked them them to unblock outgoing smtp port 25.
– After AT&T unblock outbound port 25, I have a reverse problem. When sending mails to other domains (internet outgoing mail), it is working fine with no problem. However, I can’t receive internet emails now from external domains. I have recipient policy setup, mail server is reachable from the internet, MX and A records are there in place which point to the public static IP addresses i have from the ISP, virtual SMTP and connector are there too.
What else could it wrong that I can’t seem to trace out?
Please help if you have any clue why it is not working.
Thanks for your feedback.
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