my domain is black listed

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Emails from  dgsboulder.com are getting rejected by some of my clients.
Here is the response from the IT department at the intended recipient.

Ok these messages were bounced because the sending IP address was on a “RBL” or “Registered Black List.”

 So this goes back to whoever he is hosting “@dgsboulder.com” through.

That hosting company’s Email server is on a “Registered Black List.”

 Until the hosting company fixes the problem, Mimecast will never allow email through at that address.

 
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dgswanson1865

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Posted 3 weeks ago

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Christine Richards

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Mine too!!  
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Christine Richards

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just checked it again and now it is not 
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Christine Richards

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and neither is yours dgsboulder.com
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dgswanson1865

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The problem seems to come and go.
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Christine Richards

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Yes that is what is happening to me today.  Some getting blocked and some not. 
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dgswanson1865

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I only have problems with one client.  A defense contractor with strong IT defenses.
Not getting bounces when I send to anyone else.
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Michelle C, Employee

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Hello,

I can get this reported and if there is anything we can do on our end to avoid this we will get that implemented. Thank you for reporting this and I appreciate the patience understanding. 

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