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not receiving external email

Posted on 2011-09-28
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Last Modified: 2012-05-12
I removed 2 IP addresses from one of my recieve connectors, and ever since then, I can't receive external email.  I added the IP addresses back and even restarted the server, but still am not able to receive external email, only internal email works.  Please help.  Here's the error message I get when I send one from my gmail account.


Delivery to the following recipient failed permanently:

     xxxxx@domain.org

Technical details of permanent failure:
Google tried to deliver your message, but it was rejected by the recipient domain. We recommend contacting the other email provider for further information about the cause of this error. The error that the other server returned was: 550 550 Address unknown (state 14).

----- Original message -----

Received: by 10.227.61.6 with SMTP id r6mr9672041wbh.37.1317235636412; Wed, 28
 Sep 2011 11:47:16 -0700 (PDT)
MIME-Version: 1.0
Received: by 10.227.10.83 with HTTP; Wed, 28 Sep 2011 11:46:36 -0700 (PDT)
From: xxx _ <xxxxxxxx@gmail.com>
Date: Wed, 28 Sep 2011 11:46:36 -0700
Message-ID: <CAMzYC+vT7BMP79_+eBgwXPXONMb3eV_73N60-uHS+q3ULhp-jQ@mail.gmail.com>
Subject: test15
To: xxxxx@domain.org
Content-Type: multipart/alternative; boundary=20cf30025a6031a2c004ae04d2dd
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Question by:afacts
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9 Comments
 

Author Comment

by:afacts
ID: 36719285
In looking at the even log, I see this:

Anti-spam agents are enabled, but the list of internal SMTP servers is empty. If there are any MTAs between this server and the Internet, populate this list by using the Set-TransportConfig cmdlet in the Exchange Management Shell.

Then  for months, I see this message, but I've been getting this for months, so I don't think this is it:
There is no valid SMTP Transport Layer Security (TLS) certificate for the FQDN of elisha.amazingfacts.org. The existing certificate for that FQDN has expired. The continued use of that FQDN will cause mail flow problems. A new certificate that contains the FQDN of elisha.amazingfacts.org should be installed on this server as soon as possible. You can create a new certificate by using the New-ExchangeCertificate task.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
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Expert Comment

by:Deepu Chowdary
ID: 36719624
How can you expect mails if you are not having a valid certificate with a valid FQDN
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Author Comment

by:afacts
ID: 36719651
well, its been working for months, actually, it's been like that ever since we went live with it.
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Author Comment

by:afacts
ID: 36719664
so how do I create a new certificate, would you mind walking me through it?
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Accepted Solution

by:
Deepu Chowdary earned 500 total points
ID: 36719971
Yes you will get event id 12014, 16, 18 for certificate related errors.

You can create a self signed as well as third party.
i will recommend to get a third party from GO-DADDY which was cheap and best than other CA..
0
 

Author Comment

by:afacts
ID: 36720237
the question is, I've installed certs on servers, but how do I install it on my exchange server for exchange, I've only installed certs for IIS.
How do I make the request, and then installing it, can you point me in the right direction.
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Expert Comment

by:Deepu Chowdary
ID: 36720266
How mailflow is going on.
Is it comming from a third party spam filter..?
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Author Comment

by:afacts
ID: 36720458
well, emails are coming from the outside, router, firewall, switch and then my exchange server.
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Author Comment

by:afacts
ID: 36720604
the emails are coming in, I'll just open a new question for the cert when I have time.
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Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

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