After installing Exchangedefender, email doesn't flow

paulsbrian
paulsbrian used Ask the Experts™
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After installing Exchangedefender on SBS 2008, email stopped working. We followed their instructions perfectly and in their logs, email stops at the IP address of the server. We cannot telnet internally or externally.
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Top Expert 2010

Commented:
From Exchange defender documents - this is a DNS issue
check if you can resolve these

go to start > run > type cmd
then type
nslookup outbound.exchangedefender.com

If you get this - then it's working ok. otherwise you have to figure out your DNS
C:\>nslookup outbound.exchangedefender.com
Server: UnKnown
Address: 192.168.1.1:53 >>> the IP address of SBS
Non-authoritative answer:
Name: outbound.exchangedefender.com
Address: 65.99.192.91

If that step works - then
C:\>telnet outbound.exchangedefender.com 25
you should get this -->

220 outbound.exchangedefender.com ESMTP ExchangeDefender

http://www.exchangedefender.com/media/ExchangeDefender-TroubleshootingExchangeDefenderDelivery.pdf

Author

Commented:
We did these until telnet problem. We ran ExRCA and received this error: wasn't able to find the SPF record.
Top Expert 2010

Commented:

Author

Commented:
I misspoke. We did all of this and it all worked. Email still not flowing.

Author

Commented:
Is SPF required for this issue?
Top Expert 2010

Commented:
I doubt so.

From the brief 5 minutes I spent on exchange defender - I think this is what it does (correct me if i am wrong)
It changes the first MX is that of ExchangeDefender.
they take your mail - process it then send it to your exchange server.
http://www.exchangedefender.com/howdoesitwork.php

So as part of the setup - they will ask you to create your first MX to point to exchange defender.
And then setup your exchange as a smarthost or something - to get mail from exchange defender.

Correct me if i am wrong.

If you are not getting mail that means you didnt change your MX

Go here
www.mxtoolbox.com

enter your domain name and see the first MX
if its still your exchange server -> thats why you are not getting emails.

Check Exchange defender documentation. They should have something about MX records pointing there.

thanks

Author

Commented:
We changed MX record and email is going to Exchangedefender. Here is an example log:

Jul 6 20:32:32 inbound88 sendmail[10422]: o66NXTDJ020760: to=<brian@martinhousing.org>, delay=00:58:58, xdelay=00:00:00, mailer=smtp, pri=1741525, relay=[74.42.89.218] [74.42.89.218], dsn=4.0.0, stat=Deferred: Connection refused by [74.42.89.218]

We also did an inbound test and it works. When it gets to the IP address of the server, it stops. We checked with the ISP and Sonicwall. Neither are blocking port 25.

Author

Commented:
Just found out IIS is not working. On the phone with Microsoft.
Top Expert 2010
Commented:
Can you point me to the steps which you used to install Ex Defender

Did you create a smarthost / connector ?

I think there is something in SBS which is refusing connection from anything outside the local network.
I am just guessing.

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