So the Firewall is relaying the mail?
In previous Checkpoint versions (<4.x), the SMTP Server was pretty buggy.
Daniel's idea that earthlink's servers may be doing a reverse lookup on the
ext ip address of your firewall and its being treated as SPAM sounds like a
good place to start looking.
Andy David
J Muller International
-----Original Message-----
From: Couch, Nate [mailto:[EMAIL PROTECTED]]
Sent: Friday, August 31, 2001 9:29 AM
To: Exchange Discussions
Subject: RE: IMC problem with Earthlink.net
Andy,
Here is what my firewall admin tells me. Sorry for the delay but we had
problems hooking up the past few days.
1) Trust SMTP Out rule - Any source SMTP (the MS Exchange server in this
case) can send to the external IP address on the firewall, which would then
send it on to the destination (earthlink.net in this case).
2) Trust SMTP In rule - Any source from the internet can send SMTP requests
inbound to IP address on the firewall.
Regards.
Nate
> ----------
> From: Andy David
> Reply To: [EMAIL PROTECTED]
> Sent: Wednesday, August 29, 2001 13:32
> To: [EMAIL PROTECTED]
> Subject: RE: IMC problem with Earthlink.net
>
> Yes, but what are the rules specifically? Your statement seems to imply
> that
> your firewall has something unusual setup.
>
>
>
> Andy David
> J Muller International
>
>
>
>
> -----Original Message-----
> From: Couch, Nate [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, August 29, 2001 2:13 PM
> To: Exchange Discussions
> Subject: RE: IMC problem with Earthlink.net
>
>
> I call them "rules", but this may be a misnomer. They are configuration
> settings on the firewall which an admin can use to filter traffic to and
> from the Internet.
>
> Nate
>
> > ----------
> > From: Andy David
> > Reply To: [EMAIL PROTECTED]
> > Sent: Wednesday, August 29, 2001 12:41
> > To: [EMAIL PROTECTED]
> > Subject: RE: IMC problem with Earthlink.net
> >
> > Nate, what are the rules you are referring to?
> >
> > 2) Based on the rules we have setup on the firewall the messages for
> > Earthlink are leaving the firewall destined most often for
> > mx00.earthlink.net.
> >
> >
> >
> >
> >
> > Andy David
> > J Muller International
> >
> >
> >
> >
> > -----Original Message-----
> > From: Couch, Nate [mailto:[EMAIL PROTECTED]]
> > Sent: Wednesday, August 29, 2001 1:30 PM
> > To: Exchange Discussions
> > Subject: RE: IMC problem with Earthlink.net
> >
> >
> > Michele,
> >
> > We have a Checkpoint firewall on our side.
> >
> > I did try contacting Earthlink and after dealing with them for a while I
> > felt like I had passed through a gauntlet of "no help". Very
> > frustrating.
> >
> > Nate
> >
> > -----Original Message-----
> > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
> > Sent: Wednesday, August 29, 2001 12:14 PM
> > To: Exchange Discussions
> > Subject: RE: IMC problem with Earthlink.net
> >
> >
> > what kind of firewall? PIX?
> >
> > UUNet is known as a spam haven, so it's possible that this server is
> > blocking all traffic from them. You could always use the telephone to
> > call
> > the admin of that box & find out.
> >
> > -Michèle
> > Immigration site: <http://LadySun1969.tripod.com>
> > Our new 2001 Miata: <http://members.cardomain.com/bpituley>
> > Tiggercam: <http://www.tiggercam.co.uk>
> > ---------------------------------------------------------
> > 99 percent of lawyers give the rest a bad name.
> > ---------------------------------------------------------
> >
> >
> > -----Original Message-----
> > From: Couch, Nate [mailto:[EMAIL PROTECTED]]
> > Sent: Wednesday, August 29, 2001 1:05 PM
> > To: Exchange Discussions
> > Subject: IMC problem with Earthlink.net
> >
> >
> > Scenario:
> >
> > MS Exchange 5.5. SP4
> > MS Exchange/Outlook 98 for the clients.
> > IMC through UU.NET
> >
> >
> > Here is what I am encountering:
> >
> > 1) IMC functions fine for just about everyone we send to EXCEPT
> > Earthlink.net
> >
> > 2) Based on the rules we have setup on the firewall the messages for
> > Earthlink are leaving the firewall destined most often for
> > mx00.earthlink.net.
> >
> > 3) When we send to earthlink.net addresses we get:
> >
> > "Unable to deliver the message due to a communications error"
> >
> > 4) Our ISP engineer and they can send email to earthlink from the
> firewall
> > as a company.com address so they tell me. However, anyone from inside
> the
> > firewall sending to earthlink.com gets kicked back with the above error
> > code.
> >
> > 5) It seems that something on the earthlink.net side does not like
> > whatever
> > MS Exchange is doing to the outbound messages. Inbound works fine so
> far.
> > Headers reveal that earthlink.net is using:
> >
> > 220 eagle EL_3_4_2 /EL_3_4_1 ESMTP EarthLink SMTP Server
> >
> > 6) I have checked the IMC and found no filters nor any weird
> configuration
> > (I haven't changed anything on the setup for the IMC in months and this
> > whole thing started up about four weeks ago.
> >
> > 7) I haven't found anything in the archives, FAQ, or Technet for the
> above
> > error code (at least nothing helpful). I am not seeing anything strange
> > in
> > the Event logs (not sure if I really would, but checked anyway just to
> be
> > sure).
> >
> > 8) Message Tracking doesn't reveal much information as to why the
> message
> > is
> > not being delivered.
> >
> > 9) Earthlink.net Tech Support hasn't been much help to date.
> >
> > Anyone have any ideas as to what could be causing this? My feeling is
> > that
> > either company.com is being blocked due to spam being sent from us (I
> > checked UXN Spam Combat and did not find our domain listed, but did find
> > UU.NET listed). Or, more likely the MS Exchange IMC and earthlink.net
> are
> > not talking the same language.
> >
> > Regards.
> >
> > Nate Couch
> > EDS Messaging
> >
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