Re: SMTP Inbound Mail Problem ?

From: Denis McDowell [MSFT] (denismcd_at_online.microsoft.com)
Date: 05/12/04 

Date: Wed, 12 May 2004 01:46:59 -0400

There are several firewalls\smtp products that provdie a proxy on port 25
(SMTP). In these cases, the banner will be different. 

-- 
Denis McDowell [MSFT]
"Phil Arnold" <pa5@hormel.products.not.welcome.iname.com.invalid> wrote in
message news:Xns94E6C65927D67pa5hormelproductsnot@65.24.7.150...
> Mark wrote in microsoft.public.exchange.connectivity:
>
> > at the log of my router I can see a port 25 request coming in and it
> > being routed, via a rule, to the private IP address of the DC which is
> > also hosting exchange.
>
> From any internal machine on your network, other than the server, open a
> CMD prompt and telnet SBS_NETBIOS_SERVER_NAME 25.   See what response you
> get.  It should look something like this:
>
> 220 yourdomainname.tld Microsoft ESMTP MAIL Service, Version: 6.0.3790.0
> ready at  Tue, 11 May 2004 19:28:12 -0500
>
> If successful, perform the same test from a machine outside your network
> using telnet servername.yourdomainname.tld 25.  You should see exactly
> the same response as above.  If not, something in your firewall is
> probably blocking the smtp session.
>
> Good luck.
> -PhilA
>

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