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date: Tue, 22 Apr 2008 15:26:01 -0700,
group: microsoft.public.exchange.connectivity
back
Re: Not able to get or send emails from the outside
On Tue, 22 Apr 2008 15:26:01 -0700, pckomando
wrote:
>We have a SBS 2003 server running Exchange and are not able to send or
>received email from the outside. We have the following setup: Internet Access
>through Cable Modem connected to a PC running an EBox Platform, connected to
>a 16 port switch and finally the server connected to the switch. We use the
>Ebox platform to connect a remote office. Before the Ebox installation we
>have no problem with the Exchange working fine. Also, we have tried
>redirecting the MX Records to the fixed IP address provide by our ISP, DNS's,
>Server IP address, etc. with no luck.
>
>Can anyone help? We will appreciate all the help we can get.
>
>Thanks!
>
The MX record needs to point at some public address. That public
address has to be applied to a perimeter box that forwards TCP 25 to
your SBS box. The SBS box has a single NIC and one, single, internal
IP address. Go and do that then check that the firewall allows TCP 25
into the network and through to the server.
The outbound all depends on your DNS lookups and whether or not you
are routing through the ISP relay or not. Since you have a fixed IP
address you're probably delivering direct.
Learn about nslookup and do one against microsoft.com (for no
particular reason) to see if you're resolving. THen try telnet to port
25 of one of the results.
Report back.
date: Tue, 22 Apr 2008 20:39:00 -0400
author: Mark Arnold [MVP]
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