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</style><div id='d_1589049175509' style="font-family:Courier New, Courier, monospace; font-size:11.0pt; color:#025E14"><p dir="ltr" style="margin-top:0; margin-bottom:0;">Hi Joseph,</p>
<br>
<p dir="ltr" style="margin-top:0; margin-bottom:0;">I've had the same issue that started a year ago. Eventually they removed the subnet, but it was blocked again a week later. </p>
<br>
<p dir="ltr" style="margin-top:0; margin-bottom:0;">It seems to me they import a third party block list containing my subnet, which re-blocks it shortly after removal, and they won't whitelist. They wouldn't tell me the source (nor the reason). </p>
<br>
<p dir="ltr" style="margin-top:0; margin-bottom:0;">I've repeated the remove/block cycle a few times and then just gave up and renumbered my mail servers. They don't seem to care. At all. </p>
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<p dir="ltr" style="margin-top:0; margin-bottom:0;">Your mileage may vary though. If you do get to a solution I'd appreciate hearing about it :) Good luck! </p>
<br>
<div id="signature-x" style="-webkit-user-select:none; font-family:Courier New, Courier, monospace; font-size:11.0pt; color:#025E14"><html><head></head><body class="airwise"><span style="font-family:courier new,courier,monospace;font-size:11.0pt;">-- <br>Regards,<br> Terrence Koeman, PhD/MTh/BPsy<br> Darkness Reigns (Holding) B.V.<br><br>Please quote relevant replies.<br>Spelling errors courtesy of my 'smart'phone.</span><span style="font-family:courier new,courier,monospace;font-size:9.0pt;"><br></span></body></html></div></div><div class="quoted_separate_body"/><div id="quoted_header" style="clear:both;"><hr style="border:none; height:1px; color:#E1E1E1; background-color:#E1E1E1;"/><div style="border:none; padding:3.0pt 0cm 0cm 0cm"><span style="font-size:11.0pt;font-family:Calibri, Arial, Helvetica, sans-serif"><b>From:</b> Joseph Jenkins <joe@breathe-underwater.com><br><b>Sent:</b> Saturday, 9 May 2020 04:36<br><b>To:</b> NANOG<br><b>Subject:</b> anyone on from hotmail.com, msn.com, live.com smtp?<br></span></div></div><br type='attribution'><div id="quoted_body"><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><p dir="ltr">We are getting this messages when sending emails from our domain. We've
<br>
submitted tickets, but haven't received a response yet. Anyone have any
<br>
insights?
<br>
<br>
550 5.7.1 Unfortunately, messages from [1.1.1.1] weren't sent. Please
<br>
contact your Internet service provider since part of their network is on
<br>
our block list (S3140). You can also refer your provider to
<br>
http://mail.live.com/mail/troubleshooting.aspx#errors. [
<br>
AM5EUR03FT014.eop-EUR03.prod.protection.outlook.com]
<br>
<br>
It's our own address and everything on the Microsoft site says we are clean
<br>
with no issues.
<br>
</p>
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