Some DNS Resolution Failing

@Comcast_KimberlyL​ Yes:

emulines.in

admarkpolycoats.com

  These are some domain names for mail stuck in our mail server due to this issue. (We are a Business Internet customer).

I appreciate this information. When you state that they are stuck in the mail server, to be clear, it is in the outgoing mail server? 

Don't worry about the mail server - that's just how I discovered the issue. If I try to resolve those domains on the command line using: "host emulines.in" of "host admarkpolycoats.com", there is no response. Note that if I route the DNS requests through our backup wireless LTE network, it works fine (which is what I'm doing now). Again, most domains work - it just seems that Comcast is intercepting DNS requests, inspecting the contents, and deciding whether to allow the domain to resolve or not.

I understand completely about the mail service. I'd like to take a much closer look into the tools we have available to assist with the connection concerns.

Could you please send us a private message with your first and last name, and full address for further assistance?

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More email evil from Comcast... Comcast intercepting DNS request and filtering them. From a host on my Comcast network, the output of "host -t mx chimtitan.ro": "chimtitan.ro has no MX record". If I run the same on a server on Digital Ocean's network: "chimtitan.ro mail is handled by 0 chimtitan.ro."

Please stop filtering and and scrubbing my DNS requests!!!!