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    <p><font face="Calibri">Another thought I had was whether you were
        using the approved email server for your domain.</font></p>
    <p><font face="Calibri">I had a case in the past where one client
        would be unable to receive some emails from one of their
        customers. Emails sent during the day came through fine. Emails
        in the evening would be blocked. After some review of the
        mailserver logs I saw that the sender was trying to send email
        from home using Comcast's mail server, which was not included in
        their DNS' SPF record, which specifies which mail servers are
        allowed to send email "FROM:" their domain. Comcast wasn't in
        the list. My client asked me to fix it. I said their customer
        needed to stop using Comcast's mail server, or their IT person
        needed to include Comcast in their SPF record. That would fix
        the problem.<br>
      </font></p>
    <p><font face="Calibri">So, I guess one question that can be asked
        is... are you using the correct mail server, as specified in the
        SPF record of your DNS?</font></p>
    <p><font face="Calibri">This is what mine looks like:</font></p>
    <pre>@ IN TXT ("v=spf1 ip4:216.144.202.99 ip4:216.144.202.140 ip4:216.144.210.10 -all")</pre>
    <p><font face="Calibri">Translated to English, this means "treat all
        email that doesn't come from these three email servers as spam
        and delete them."<br>
      </font></p>
    <p><font face="Calibri">Thanks,</font></p>
    <font face="Calibri">Mik</font>
    <pre class="moz-signature" cols="72">---
Mik Muller, president
Montague WebWorks
239-R Main Street, Greenfield, MA
413-320-5336
<a class="moz-txt-link-freetext" href="http://MontagueWebWorks.com">http://MontagueWebWorks.com</a>
Powered by ROCKETFUSION</pre>
    <div class="moz-cite-prefix">On 5/28/2020 1:21 PM, Sam McClellan via
      Hidden-discuss wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:e1e651a2-e359-02b2-caf6-15c93edc41a8@itabix.com">
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      <font face="Helvetica, Arial, sans-serif">Yes, I added a DMARC
        record to his dns earlier but it didn't help so far. <br>
        <br>
        For those who are interested, I created a knowledgebase article
        for our site on DMARC, what it is and how to create one here:<br>
      </font><br>
      <font face="Helvetica, Arial, sans-serif"><a
href="https://itabix.com/client/knowledgebase/10077/Whatandsharp039s-a-DMARC-and-how-can-it-help-keep-my-emails-from-getting-rejected.html"
          moz-do-not-send="true">https://itabix.com/client/knowledgebase/10077/Whatandsharp039s-a-DMARC-and-how-can-it-help-keep-my-emails-from-getting-rejected.html</a><br>
      </font><font face="Helvetica, Arial, sans-serif"><font
          face="Helvetica, Arial, sans-serif"><br>
          Here's the relevant part below. If you want to set up a DMARC
          on cPanel I give instructions in the article.<br>
          <br>
          <blockquote type="cite">
            <p style="box-sizing: border-box; margin: 0px 0px 10px;
              color: rgb(51, 51, 51); font-family: "Open
              Sans", Verdana, Tahoma, serif; font-size: 16.8px;
              font-style: normal; font-variant-ligatures: normal;
              font-variant-caps: normal; font-weight: 200;
              letter-spacing: normal; orphans: 2; text-align: start;
              text-indent: 0px; text-transform: none; white-space:
              normal; widows: 2; word-spacing: 0px;
              -webkit-text-stroke-width: 0px; background-color: rgb(255,
              255, 255); text-decoration-style: initial;
              text-decoration-color: initial;"><strong
                style="box-sizing: border-box; font-weight: 700;"><span
                  style="box-sizing: border-box; font-family: Helvetica,
                  Arial, sans-serif;">About DMARC</span></strong></p>
            <p style="box-sizing: border-box; margin: 0px 0px 10px;
              color: rgb(51, 51, 51); font-family: "Open
              Sans", Verdana, Tahoma, serif; font-size: 16.8px;
              font-style: normal; font-variant-ligatures: normal;
              font-variant-caps: normal; font-weight: 200;
              letter-spacing: normal; orphans: 2; text-align: start;
              text-indent: 0px; text-transform: none; white-space:
              normal; widows: 2; word-spacing: 0px;
              -webkit-text-stroke-width: 0px; background-color: rgb(255,
              255, 255); text-decoration-style: initial;
              text-decoration-color: initial;"><span style="box-sizing:
                border-box; font-family: Helvetica, Arial, sans-serif;">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.).<br
                  style="box-sizing: border-box;">
                <br style="box-sizing: border-box;">
                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.<br
                  style="box-sizing: border-box;">
                <br style="box-sizing: border-box;">
                It's also a way of showing other mail servers that your
                email is reputable.</span></p>
            <p style="box-sizing: border-box; margin: 0px 0px 10px;
              color: rgb(51, 51, 51); font-family: "Open
              Sans", Verdana, Tahoma, serif; font-size: 16.8px;
              font-style: normal; font-variant-ligatures: normal;
              font-variant-caps: normal; font-weight: 200;
              letter-spacing: normal; orphans: 2; text-align: start;
              text-indent: 0px; text-transform: none; white-space:
              normal; widows: 2; word-spacing: 0px;
              -webkit-text-stroke-width: 0px; background-color: rgb(255,
              255, 255); text-decoration-style: initial;
              text-decoration-color: initial;"><span style="box-sizing:
                border-box; font-family: Helvetica, Arial, sans-serif;"><strong
                  style="box-sizing: border-box; font-weight: 700;">Creating
                  a DMARC Record</strong><br style="box-sizing:
                  border-box;">
                <br style="box-sizing: border-box;">
                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<br style="box-sizing: border-box;">
                and content that looks something like this<br
                  style="box-sizing: border-box;">
v=DMARC1;p=reject;sp=none;adkim=r;aspf=r;pct=100;fo=0;rf=afrf;ri=86400;ruf=<a
                  class="moz-txt-link-freetext"
                  href="mailto:me@mydomain.com" moz-do-not-send="true">mailto:me@mydomain.com</a><br
                  style="box-sizing: border-box;">
                <br style="box-sizing: border-box;">
                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:<br style="box-sizing: border-box;">
                <br style="box-sizing: border-box;">
                <a href="https://dmarcian.com/dmarc-record-wizard/"
                  style="box-sizing: border-box; background-color:
                  transparent; color: rgb(0, 85, 136); text-decoration:
                  none;" moz-do-not-send="true">https://dmarcian.com/dmarc-record-wizard/</a><br>
              </span></p>
          </blockquote>
        </font></font><font face="Helvetica, Arial, sans-serif">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.<br>
        <br>
        Sam<br>
      </font>
      <div class="moz-signature"><br>
        <hr size="1"> Sam McClellan<br>
        <strong>Itabix, Inc</strong><br>
        <i>One place for all things Web</i><br>
        <a class="moz-txt-link-abbreviated" href="mailto:sam@itabix.com"
          moz-do-not-send="true">sam@itabix.com</a><br>
        <a class="moz-txt-link-freetext" href="https://itabix.com"
          moz-do-not-send="true">https://itabix.com</a><br>
        Main - 413.587.4600<br>
        Toll-free - 877-7ITABIX (877.748.2249) <br>
        <br>
      </div>
      <div class="moz-cite-prefix">On 5/28/2020 10:37 AM, Larry Kuttner
        via Hidden-discuss wrote:<br>
      </div>
      <blockquote type="cite"
cite="mid:CACqgBpaB8hbgE-777_fE9LCC4nduLt3pY5Kd87cY=4CfXGGL+g@mail.gmail.com">
        <meta http-equiv="content-type" content="text/html;
          charset=UTF-8">
        <div dir="ltr">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.  
          <div>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.
            <div><br>
            </div>
            <div>Here's some helpful info: <a
                href="https://www.dmarcanalyzer.com/how-to-create-a-dmarc-record/"
                moz-do-not-send="true">https://www.dmarcanalyzer.com/how-to-create-a-dmarc-record/</a></div>
            <div>
              <div><br>
              </div>
              -- <br>
              <div dir="ltr" class="gmail_signature"
                data-smartmail="gmail_signature">
                <div dir="ltr">
                  <div>
                    <div dir="ltr">
                      <div>
                        <div dir="ltr">
                          <div>
                            <div dir="ltr">
                              <div dir="ltr"
                                style="color:rgb(0,0,0);font-size:12.8px"><b>Larry
                                  Kuttner</b><br>
                                Information Technology Manager<br>
                                Northeast Sustainable Energy Association
                                (NESEA)</div>
                              <div dir="ltr"><font color="#000000"><span
                                    style="font-size:12.8px">20 Federal
                                    Street, Greenfield, MA 01301</span></font><br>
                              </div>
                              <div dir="ltr"><a
                                  href="tel:(413)%20774-6051"
                                  value="+14137746051"
                                  style="color:rgb(17,85,204);font-size:12.8px"
                                  target="_blank" moz-do-not-send="true">413.774.6051</a><font
style="color:rgb(0,0,0);font-size:12.8px" color="#000000"><span
                                    style="font-size:12.8px"> ext. </span>12 </font><font
                                  color="#000000"><b>·</b></font><span
                                  style="color:rgb(0,0,0);font-size:12.8px"> </span><font
style="color:rgb(0,0,0);font-size:12.8px" color="#000000"><a
                                    href="mailto:lkuttner@nesea.org"
                                    style="color:rgb(17,85,204)"
                                    target="_blank"
                                    moz-do-not-send="true">lkuttner@nesea.org</a></font></div>
                              <div dir="ltr"
                                style="color:rgb(0,0,0);font-size:12.8px"><font
                                  color="#000000"><a
                                    href="http://www.nesea.org/"
                                    style="color:rgb(17,85,204)"
                                    target="_blank"
                                    moz-do-not-send="true">www.nesea.org</a></font></div>
                            </div>
                          </div>
                        </div>
                      </div>
                    </div>
                  </div>
                </div>
              </div>
            </div>
          </div>
        </div>
        <br>
        <fieldset class="mimeAttachmentHeader"></fieldset>
        <pre class="moz-quote-pre" wrap="">_______________________________________________
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</pre>
      </blockquote>
      <br>
      <br>
      <fieldset class="mimeAttachmentHeader"></fieldset>
      <pre class="moz-quote-pre" wrap="">_______________________________________________
Hidden-discuss mailing list - home page: <a class="moz-txt-link-freetext" href="http://www.hidden-tech.net">http://www.hidden-tech.net</a>
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</pre>
    </blockquote>
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