RE: Can't telnet port 25 from server but can from other client

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From: Michael Patrick (MichaelPatrick_at_discussions.microsoft.com)
Date: 12/15/04 

Date: Wed, 15 Dec 2004 14:25:02 -0800

Okay, restarted.....still nada....
Is it all outgoing e-mail that is getting stuck? Or just to a particular
domain?
And you didnt say if you are using a smarthost or dns to route e-mail...

"Julie Turner" wrote:

> Unfortunately starting and stopping the service did not do anything, although
> I was fairly sure it wouldn't becuase I've restarted the server several times
> today, and ran the internet and email connection wizard about 6 different
> times, hoping that something just want's "taking".
>
> As I said in my other email I know the ISP isn't blocking traffic on port 25
> for two reasons. The first, I called them and they said they don't. And the
> second, becuase if I go to another machine on the local network and try
> telnet smtp.mainesource.com 25 it connects. If I try to do the same thing
> from the server, it fails to connect, however, I can't ping
> smtp.mainesource.com and it responds so I'm fairly sure there is no DNS
> problem.
>
> The real pain here is that it was working at one point and isn't now for no
> apparent reason. There is a router and a DSL modem and they both have
> firewalls however, it's my understanding that firewalls such as these only
> block incomming traffic so I am not sure why I would want to open up port 25
> unless I'm just missing something there.
>
> "Michael Patrick" wrote:
>
> > Just for the heck of it......go to System Manager (exchange), under admin
> > groups, first admin, server, protocols, and then SMTP you have your virtual
> > server..... try to stop and restart.....
> >
> > If that doesnt work, we may want to check your settings there......or do you
> > have a router that might not be configured properly?
> >
> > Since you said it was working fine, and if restarting the SMTP server does
> > not help....call your isp and see if they changed anything recently....they
> > may have blocked your port 25 there..... Which this may be the case....
> >
> > Go to your SMTP Virtual server properties, delivery tab and advanced button
> > what is listed in smarthost?
> >
> > "Michael Patrick" wrote:
> >
> > > Running ISA at all?
> > >
> > > "Julie Turner" wrote:
> > >
> > > > Hopefully someone has some ideas...
> > > >
> > > > For about 3 weeks email has been happily coming in on the pop3 connector and
> > > > going out via forwarding to a smart host. Somehow something got changed and
> > > > all the sudden email is stuck in the SmallBusiness SMTP connector queue. I
> > > > cannot telnet to an external smtp server on port 25 from the SBS2003 server.
> > > > However, I can do so from another computer on the internal network which
> > > > disproves my original assumption that the ISP was blocking port 25.
> > > >
> > > > The Firewall on the server is turned off... or is the the best of my ability
> > > > to ascertain. However, it's been suggested to me that the server is blocking
> > > > outgoing traffic on that port. I've checked the TCP/IP filtering on the
> > > > network connection and none are set up...
> > > >
> > > > So at this point i'm at a loss. Anyone have any ideas?

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