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“The daily email notifications from our Unitrends device are being sent to my Outlook junk folder with “Domain does not exist” added to the subject line. Unitrends tech support tells me that we need to set up a DNS entry for unitrends.marine-ingredients.com so that it resolves.”

Hi guys, so here’s the issue. We’ve added DNS records (spf to the forward look up zone and ptr in the reverse lookup zone) and nslookup of the unitrends. domain resolves back to the proper ip address. Any ideas?

@Cisco

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What is the server? Is it Windows Server 2003 or 2008? (I am assume R2 on either) Is it 2012 even? It sounds like a firewall issue more than anything. Something is blocking it by the sounds of it. I’ve seen where it says it doesn’t exist because it can’t resolve it due to, again, a firewall issue. What type of firewall is the client using? More info please!

Thanks,

A.J.

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Do you have the FQDN of the DPU configured properly to their local domain?

The smtp configuration might need to be modified, or they could just do the easy thing, right click the email, go to junk email, and put it in safe senders list.

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The server it’s 2008 r2, firewall is a cisco asa 5505.

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Jeremy - Can you PM me the case number associated with the response above? I’d like to have the support team look into this further.

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Are you using an internal Exchange server or an external service for email?

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internal (the 2008 r2 in reference above)

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What version of Exchange are you running?

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Looks like the TXT (SPF) record didn’t do it (on its own) but the email starting flowing after the PTR (reverse lookup) was put in. I am guessing that that was the issue.

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That it was a Unitrends device is really coincidental. It’s really a DNS interaction with Exchange issue that would apply to any anonymous device attempting to utilize SMTP on the network.

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