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<p><font face="Calibri">I did a lookup on the 550 error text and
found this snippet:</font></p>
<p><font face="Calibri">"If you're receiving this error, it means
your email message was sent from a server or domain that is
currently listed as a high volume spam source by a reputable
global black list."</font></p>
<p><font face="Calibri">... which is weird because you're not on any
blacklists I can see.<br>
</font></p>
<p><font face="Calibri">I did an MX lookup on your domain
smallbatchbooks.com and it says there's no DMARC record
published, which shouldn't be a good enough reason to block you.</font></p>
<p><font face="Calibri">This report says your name servers have
different MX records, which could be the problem.</font></p>
<ul>
<li><a moz-do-not-send="true"
href="https://viewdns.info/dnsreport/?domain=smallbatchbooks.com"><font
face="Calibri">https://viewdns.info/dnsreport/?domain=smallbatchbooks.com</font></a></li>
</ul>
<p><font face="Calibri">Mik<br>
</font></p>
<p><font face="Calibri"><br>
</font></p>
<p><font face="Calibri"></font><br>
</p>
<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 5/27/2020 11:16 AM, Fred Levine via
Hidden-discuss wrote:<br>
</div>
<blockquote type="cite"
cite="mid:C383A1CF-AB31-4BA1-9BE7-FFFA028F297B@smallbatchbooks.com">
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<p class="MsoNormal"><span style="font-size:11.0pt">I’m
wondering if anyone can shed light on this error message
(Outlook for Mac):<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:-webkit-standard;color:black"> host
mx2.hc3579-74.iphmx.com [139.138.58.193]<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:-webkit-standard;color:black"> SMTP
error from remote mail server after DATA:<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:-webkit-standard;color:black"> 550
#5.7.1 Your access to submit messages to this e-mail system
has been rejected<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I’ve sent
multiple messages to the same address with no problem.
Suddenly they’re being rejected.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Fred<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Fred Levine<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Small Batch
Books<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">493 S.
Pleasant St.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Amherst, MA
01002<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">413.230.3943<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
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