{"version":"1.0","provider_name":"FireStorm ISP","provider_url":"https:\/\/www.firestorm.ch\/en\/","title":"Error \"Client host rejected: cannot find your hostname\"","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"99OXYOpUtj\"><a href=\"https:\/\/www.firestorm.ch\/en\/kb\/error-client-host-rejected-cannot-find-your-hostname\/\">Error &#8220;Client host rejected: cannot find your hostname&#8221;<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/www.firestorm.ch\/en\/kb\/error-client-host-rejected-cannot-find-your-hostname\/embed\/#?secret=99OXYOpUtj\" width=\"600\" height=\"338\" title=\"&#8220;Error &#8220;Client host rejected: cannot find your hostname&#8221;&#8221; &#8212; FireStorm ISP\" data-secret=\"99OXYOpUtj\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script type=\"text\/javascript\">\n\/* <![CDATA[ *\/\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n\/\/# sourceURL=https:\/\/www.firestorm.ch\/wp-includes\/js\/wp-embed.min.js\n\/* ]]> *\/\n<\/script>\n","description":"Error when receiving a message The error message &#8216;Client host rejected: cannot find your hostname&#8217; is displayed to the sender if his provider has configured the IP addresses of his mail server incorrectly. Emails with incorrectly configured IP addresses are rejected by FireStorm. The sender must contact his provider and ask his provider to correctly [&hellip;]","thumbnail_url":"https:\/\/www.firestorm.ch\/wp-content\/uploads\/2018\/12\/rDNS-check.png","thumbnail_width":648,"thumbnail_height":251}