{"version":"1.0","provider_name":"Blog","provider_url":"https:\/\/elementor.com\/blog","author_name":"Itamar Haim","author_url":"https:\/\/elementor.com\/blog\/author\/itamarha\/","title":"What Is an Email Header? A Complete Guide for Marketers & Web Creators","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"ta9j0rgmCY\"><a href=\"https:\/\/elementor.com\/blog\/what-is-an-email-header\/\">What Is an Email Header? A Complete Guide for Marketers &#038; Web Creators<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/elementor.com\/blog\/what-is-an-email-header\/embed\/#?secret=ta9j0rgmCY\" width=\"600\" height=\"338\" title=\"&#8220;What Is an Email Header? A Complete Guide for Marketers &#038; Web Creators&#8221; &#8212; Blog\" data-secret=\"ta9j0rgmCY\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\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:\/\/elementor.com\/blog\/wp-includes\/js\/wp-embed.min.js\n<\/script>\n","thumbnail_url":"https:\/\/elementor.com\/blog\/wp-content\/uploads\/2025\/11\/imgi_31_imgi_3_2022_2_blog_How-To-Customize-the-WooCommerce-Checkout-Page-With-Elementor-no-text-1200X630.jpeg","thumbnail_width":1200,"thumbnail_height":630,"description":"When you send or receive an email, you see the basics: a sender, a recipient, a subject, and the message body. But behind that simple interface lies a hidden, complex layer of data. This data is the email header. Think of it as your email's digital passport, complete with every stamp, signature, and security check from its journey across the internet."}