[Hidden-tech] Outlook Error Message

Sam McClellan sam at itabix.com
Thu May 28 17:21:53 UTC 2020

Yes, I added a DMARC record to his dns earlier but it didn't help so far.

For those who are interested, I created a knowledgebase article for our 
site on DMARC, what it is and how to create one here:


Here's the relevant part below. If you want to set up a DMARC on cPanel 
I give instructions in the article.

> *About DMARC*
> DMARC is pretty confusing to even relatively geeky people. DMARC 
> (Domain-based Message Authentication, Reporting and Conformance) is an 
> email authentication protocol you can add to your DNS zone (your 
> domain's entry in the web's "phone directory" that translates a domain 
> name into something a computer can use for getting you to a website or 
> passing along an email, etc.).
> It's designed to give email domain owners the ability to protect their 
> domain from unauthorized use, commonly known as email spoofing. The 
> purpose and primary outcome of implementing DMARC is to protect a 
> domain from being used in email compromise attacks, phishing emails, 
> email scams and other cyber threat activities.
> It's also a way of showing other mail servers that your email is 
> reputable.
> *Creating a DMARC Record*
> To create a DMARC record, if you have access to your DNS zone records, 
> create a new TXT record with the name _dmarc.yourdomain.com
> and content that looks something like this
> v=DMARC1;p=reject;sp=none;adkim=r;aspf=r;pct=100;fo=0;rf=afrf;ri=86400;ruf=mailto:me at mydomain.com
> Obviously this is not something you can create out of the blue. 
> cPanel, the world's most widely used control panel for web hosting 
> that we use at Itabix, now has a built in DMARC creation tool in the 
> DNS zone editor (we'll walk you through that below), or you can use a 
> DMARC generator on the web however most of the DMARC generators are 
> also difficult to understand. We really like this one:
> https://dmarcian.com/dmarc-record-wizard/
Remember to set the policy to Quarantine (set aside for additional 
processing) or Reject (get rid of it) because, as Larry said, setting it 
to do nothing won't cut it with a lot of mail servers and you'll still 
be rejected.


Sam McClellan
*Itabix, Inc*
/One place for all things Web/
sam at itabix.com
Main - 413.587.4600
Toll-free - 877-7ITABIX (877.748.2249)

On 5/28/2020 10:37 AM, Larry Kuttner via Hidden-discuss wrote:
> It is probably the lack of a DMARC record that is causing it.  In that 
> past year, I have seen several providers start blocking email from 
> domains that do not have a DMARC policy.
> I also recently found that the DMARC policy must specifically have a 
> quarantine or reject policy.  When I added a quarantine policy to our 
> existing DMARC, many email recipients that were getting rejected are 
> now being accepted.
> Here's some helpful info: 
> https://www.dmarcanalyzer.com/how-to-create-a-dmarc-record/
> -- 
> *Larry Kuttner*
> Information Technology Manager
> Northeast Sustainable Energy Association (NESEA)
> 20 Federal Street, Greenfield, MA 01301
> 413.774.6051 <tel:(413)%20774-6051> ext. 12 *·*lkuttner at nesea.org 
> <mailto:lkuttner at nesea.org>
> www.nesea.org <http://www.nesea.org/>
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