Microsoft Exchange 2013 is not receiving internet email

email-serverexchangeexchange-2013windows-server-2008windows-server-2008-r2

We are having issues with our exchange 2013 server. The server is running Windows Server 2008 R2 Standard.

The issue we're having is that our Exchange server isn't receiving internet emails. It can currently send mail out to internet addresses, and send and receive internal emails from the current email server. I have checked the settings of the receive connectors and everything seems correct. We have tried everything that we can think of.

We can send and receive email locally, and send out to a gmail account. However, we don't get the reply email from the gmail account to the inbox.

Thanks in advance!!
Image is of the DNS settings on the exchange server.
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Best Answer

This looks like a DNS problem.

First of all, a little tip: it's quite useless to obscure your IP address while you post your DNS names... we have DNS resolution too :)

Ok, let's have a look at it. autodiscover.clearspaninc.com and owa.clearspaninc.com seem to be defined, but they can't be resolved, at least from my network. This prompted me to have a look at the NS record for the clearspaninc.com domain:

Non-authoritative answer:
clearspaninc.com        nameserver = ns0.directnic.com
clearspaninc.com        nameserver = ns1.directnic.com

ns0.directnic.com       internet address = 74.117.217.20
ns1.directnic.com       internet address = 74.117.218.20

Ok, let's stop here for a moment. You posted a screenshot from what clearly looks like a Microsoft DNS server, but those listed here are definitely not your servers: it looks like your DNS domain is actually managed by your ISP, not by you. Thus, anything you write in your DNS server is simply going to be ignored by the rest of the world.

And, indeed, the problem seems to be here. For me (and for the rest of the world), the name mail.clearspaninc.com resolves to 173.10.197.225, and when doing a telnet mail.clearspaninc.com 25, this is what I get:

220 sjl0vm-cass04.colo.sonicwall.com ESMTP SonicWALL (8.0.1.2353)

Whoops. This definitely isn't your Exchange server.

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