General discussion
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Topic
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Exchange Inbound SMTP
LockedNOT RECEIVING INBOUND MAIL
I have W2K3 server as my AD domain controller, DHCP, DNS, and ISA-2003 in
one box. Another box is my Exchange Server behind ISA.Connectivity details below:
I got a DSL modem connected to the ROUTER with WAN IP-address 202.123.213.321 and LAN IP 10.117.18.1.My ISA-server’s external interface is connected to one of the Router’s port with an IP address of 10.117.18.100 and the internal NIC is connected to a SWITCH with an IP address of 10.117.19.100.
My EXHANGE SERVER is connected to the SWITCH with an IP address of 10.117.19.101 and a WinXP-client with an IP address of 10.117.19.110.
Both EXCHANGE SERVER and WinXP-Client are members of the domain.
Current Configuration details:
DNS:
Mail Exchanger (MX) [10]mtp.mydomain.com
smtp 321.213.132.123The MX record points to the host record named smtp, which points to my router WAN-IP address.
ISA Firewall Policy:
1 Outbound-SMTP Allow SMTP Internal External All Users2 Inbound-SMTP Allow SMTP Server External 10.117.19.101
ROUTER Forwarding:
The router forward all inbound SMTP TCP/25 request to my ISA firewall’s External NIC which is 10.117.18.100.Testing using WinXP Client box:
By testing the Inbound SMTP traffic using Telnet, I always get a response like below:220 ExchServer.mydomain,com Microsoft ESMTP MAIL Service, Version 6.0.3790.21 ready at Mon, 30 May 2005 17:20:30 +1000
Any help will be greatly appreciated.
Thank you