{"id":7706,"date":"2024-08-06T14:24:02","date_gmt":"2024-08-06T12:24:02","guid":{"rendered":"https:\/\/www.sigalou-domotique.fr\/?p=7706"},"modified":"2026-01-04T21:25:05","modified_gmt":"2026-01-04T19:25:05","slug":"je-teste-lindesirabilite-spam-de-mes-emails","status":"publish","type":"post","link":"https:\/\/www.sigalou-domotique.fr\/en\/je-teste-lindesirabilite-spam-de-mes-emails","title":{"rendered":"I test the undesirability (spam) of my emails"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_89 counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<label for=\"ez-toc-cssicon-toggle-item-6ae4fd625e1b4\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6ae4fd625e1b4\"  aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.sigalou-domotique.fr\/en\/je-teste-lindesirabilite-spam-de-mes-emails\/#Objectif\" >Objective<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.sigalou-domotique.fr\/en\/je-teste-lindesirabilite-spam-de-mes-emails\/#Site_utilise\" >Site used<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.sigalou-domotique.fr\/en\/je-teste-lindesirabilite-spam-de-mes-emails\/#Principe_de_fonctionnement\" >Operating principle<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.sigalou-domotique.fr\/en\/je-teste-lindesirabilite-spam-de-mes-emails\/#Resultat\" >Result<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Objectif\"><\/span>Objective<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>I had some problems configuring my mail servers.<\/p>\r\n<p>Obviously, to make it simple, I mix a lot of things, a Microsoft Tenant, domain names at OVH and hosting at Ionos, at one point, there is a configuration parameter that blocks.<\/p>\r\n<p>I discovered a great site that in a few seconds checks everything for me and tells me if the DNS settings are compliant, if the SPF, KDIM, DMARC\u2026 configurations are up to speed.<!--more--><\/p>\r\n<h2><span class=\"ez-toc-section\" id=\"Site_utilise\"><\/span>Site used<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p><a href=\"https:\/\/www.mail-tester.com\/\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter  wp-image-7707\" src=\"https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2024\/08\/mail-tester_logo.svg\" alt=\"\" width=\"406\" height=\"87\" \/><\/a><\/p>\r\n<p>This site is cute, simple and particularly powerful.<\/p>\r\n<p><a href=\"https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2024\/08\/testmail-1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-7709\" src=\"https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2024\/08\/testmail-1.png\" alt=\"\" width=\"1658\" height=\"544\" srcset=\"https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2024\/08\/testmail-1.png 1658w, https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2024\/08\/testmail-1-600x197.png 600w, https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2024\/08\/testmail-1-300x98.png 300w, https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2024\/08\/testmail-1-1024x336.png 1024w, https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2024\/08\/testmail-1-768x252.png 768w, https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2024\/08\/testmail-1-1536x504.png 1536w\" sizes=\"auto, (max-width: 1658px) 100vw, 1658px\" \/><\/a><\/p>\r\n<h2><span class=\"ez-toc-section\" id=\"Principe_de_fonctionnement\"><\/span>Operating principle<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>The site gives me an email address and I send an email to that address, simply then I press \u2018Check your score\u2019.<\/p>\r\n<h2><span class=\"ez-toc-section\" id=\"Resultat\"><\/span>Result<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>At this stage, I have corrected everything, the reporting concerns of SPF or the activation of DMARC.<\/p>\r\n<p>I have, in the end, 10\/10<\/p>\r\n<p><a href=\"https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2024\/08\/testmail2.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-7710\" src=\"https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2024\/08\/testmail2.png\" alt=\"\" width=\"1640\" height=\"512\" srcset=\"https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2024\/08\/testmail2.png 1640w, https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2024\/08\/testmail2-600x187.png 600w, https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2024\/08\/testmail2-300x94.png 300w, https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2024\/08\/testmail2-1024x320.png 1024w, https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2024\/08\/testmail2-768x240.png 768w, https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2024\/08\/testmail2-1536x480.png 1536w\" sizes=\"auto, (max-width: 1640px) 100vw, 1640px\" \/><\/a><\/p>\r\n<p>But I still have one point to improve:<\/p>\r\n<p><a href=\"https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2024\/08\/testmail3.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-7711\" src=\"https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2024\/08\/testmail3.png\" alt=\"\" width=\"1120\" height=\"510\" srcset=\"https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2024\/08\/testmail3.png 1120w, https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2024\/08\/testmail3-600x273.png 600w, https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2024\/08\/testmail3-300x137.png 300w, https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2024\/08\/testmail3-1024x466.png 1024w, https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2024\/08\/testmail3-768x350.png 768w\" sizes=\"auto, (max-width: 1120px) 100vw, 1120px\" \/><\/a><\/p>\r\n<p>This is the correspondence between the DNS pointer record (Type PTR) and the HELO, although the site detects that HELO and rDNS are not identical:<\/p>\r\n<p><a href=\"https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2024\/08\/testmail4.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-7712\" src=\"https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2024\/08\/testmail4.png\" alt=\"\" width=\"607\" height=\"149\" srcset=\"https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2024\/08\/testmail4.png 607w, https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2024\/08\/testmail4-600x147.png 600w, https:\/\/www.sigalou-domotique.fr\/wp-content\/uploads\/2024\/08\/testmail4-300x74.png 300w\" sizes=\"auto, (max-width: 607px) 100vw, 607px\" \/><\/a><\/p>\r\n<p>This seems to be a problem, for example with AOL messaging (still dinosaurs with AOL??)\u00a0<\/p>\r\n<p>Of course, I did some research to see if it was going to be a problem or not.<\/p>\r\n<p>Here is Microsoft\u2019s response to this discrepancy between HELO and rDNS:<\/p>\r\n<ul>\r\n<li><a href=\"https:\/\/learn.microsoft.com\/en-us\/exchange\/troubleshoot\/antispam-and-protection\/cannot-send-emails-to-external-recipients\" target=\"_blank\" rel=\"noopener\">https:\/\/learn.microsoft.com\/en-us\/exchange\/troubleshoot\/antispam-and-protection\/cannot-send-emails-to-external-recipients<\/a><\/li>\r\n<\/ul>\r\n<p>Microsoft explains in a few lines that they use several servers to send emails and that this seems to be the mode of operation of large platforms, they do not bring any solution apart from contacting the email provider who would refuse emails on which HELO is different from rDNS.<\/p>\r\n<p>In short, obviously nothing shocking for them, I will remain so configured.<\/p>","protected":false},"excerpt":{"rendered":"<p>Objective I had some problems configuring my mail servers. Obviously, to make it simple, I mix a lot of things, a Microsoft Tenant, domain names at OVH and hosting at Ionos, at one point, there is a configuration parameter that blocks. I discovered a great site [\u2026]<\/p>","protected":false},"author":1,"featured_media":7709,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[70,24,166],"tags":[],"class_list":["post-7706","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cybersecurite","category-microsoft-365","category-retex"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.sigalou-domotique.fr\/en\/wp-json\/wp\/v2\/posts\/7706","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.sigalou-domotique.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sigalou-domotique.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sigalou-domotique.fr\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sigalou-domotique.fr\/en\/wp-json\/wp\/v2\/comments?post=7706"}],"version-history":[{"count":0,"href":"https:\/\/www.sigalou-domotique.fr\/en\/wp-json\/wp\/v2\/posts\/7706\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.sigalou-domotique.fr\/en\/wp-json\/wp\/v2\/media\/7709"}],"wp:attachment":[{"href":"https:\/\/www.sigalou-domotique.fr\/en\/wp-json\/wp\/v2\/media?parent=7706"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sigalou-domotique.fr\/en\/wp-json\/wp\/v2\/categories?post=7706"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sigalou-domotique.fr\/en\/wp-json\/wp\/v2\/tags?post=7706"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}