{"id":15088,"date":"2020-12-29T04:30:14","date_gmt":"2020-12-29T04:30:14","guid":{"rendered":"https:\/\/www.gmass.co\/blog\/?p=15088"},"modified":"2021-11-26T05:50:18","modified_gmt":"2021-11-26T05:50:18","slug":"email-header","status":"publish","type":"post","link":"https:\/\/www.gmass.co\/blog\/email-header\/","title":{"rendered":"What Is an Email Header? (Importance, Examples, Components)"},"content":{"rendered":"<p>An <a href=\"#whatis\"><b>email header<\/b><\/a> is the part of an email that contains information about the mail <b>sender<\/b><b>, receiver, and subject<\/b>.<\/p>\n<p>Each email has a custom header that includes technical information for efficient email delivery, and you can view the complete header on email apps like <a id=\"this\" href=\"#gmail\">Gmail<\/a>, <a href=\"#outlook\">Outlook<\/a>, <a href=\"#yahoo\">Yahoo<\/a>, etc.<\/p>\n<p>In this article, I\u2019ll cover everything you need to know about email headers, including what it is and <a href=\"#whydo\">why it\u2019s essential<\/a>. I\u2019ll also show you <a href=\"#howto\">how to view your complete email header<\/a> across different email apps.<\/p>\n<h2>This Article Contains:<\/h2>\n<p>(click on the links below to jump to a specific section)<\/p>\n<ul>\n<li><a href=\"#whatis\">What Is an Email Header?<\/a><\/li>\n<li><a href=\"#whydo\">Why Do You Need an Email Header?<\/a><\/li>\n<li><a href=\"#howto\">How to Access Your Email Header (Step-by-Step Guide)<\/a>\n<ul>\n<li><a href=\"#gmail\">Gmail<\/a><\/li>\n<li><a href=\"#outlook\">Outlook<\/a><\/li>\n<li><a href=\"#yahoo\">Yahoo<\/a><\/li>\n<\/ul>\n<\/li>\n<li id=\"whatis\"><a href=\"#whatare\">What Are the Different Aspects of an Email Header?\u00a0<\/a><\/li>\n<\/ul>\n<p>Let\u2019s get started.<\/p>\n<h2>What is an Email Header?<\/h2>\n<p>The header (internet header) is the section of your mail that includes information like the sender details, receiver details, subject, and date. Other technical details like the <b>Return Path<\/b><b>, <\/b><b>Reply<\/b><b>-To Field, and <\/b><b>Message ID<\/b> are also included in an email header.<\/p>\n<p>Here\u2019s what a complete email header looks like:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-18605\" style=\"border: 1px solid #000000;\" src=\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Complete-email-header.png\" alt=\"Complete email header\" width=\"550\" height=\"624\" srcset=\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Complete-email-header.png 903w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Complete-email-header-265x300.png 265w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Complete-email-header-768x871.png 768w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Complete-email-header-21x24.png 21w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Complete-email-header-32x36.png 32w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Complete-email-header-42x48.png 42w\" sizes=\"auto, (max-width: 550px) 100vw, 550px\" \/><\/p>\n<p><b>But wait\u2026 don\u2019t headers just refer to the top of the email?<br \/>\n<\/b>In most documents, a header generally refers to the top of the page, while a footer refers to the data at the bottom of the page.<\/p>\n<p>However, email headers don\u2019t function in the same way.<\/p>\n<p>Email headers are <b>specialized <\/b>pieces of information that contain data that\u2019s vital to mail deliverability. And while some aspects of the email header can be found at the top of your email, your custom header needs to be <a href=\"#howto\">accessed separately<\/a>.<\/p>\n<p><b>So what is the start of the email called?<br \/>\n<\/b>The information at the start of an email message is called the <strong>preheader text<\/strong>.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-18606\" style=\"border: 1px solid #000000;\" src=\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Preheader-text.png\" alt=\"Preheader text\" width=\"550\" height=\"236\" srcset=\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Preheader-text.png 1024w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Preheader-text-300x129.png 300w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Preheader-text-768x329.png 768w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Preheader-text-24x10.png 24w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Preheader-text-36x15.png 36w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Preheader-text-48x21.png 48w\" sizes=\"auto, (max-width: 550px) 100vw, 550px\" \/><\/p>\n<p>Your preheader text refers to the lines of text mentioned after your subject line in your inbox. Strong preheader text can go a long way in getting recipients to open your emails.<\/p>\n<p><a id=\"whydo\" href=\"#this\"><b>Back to contents<\/b><\/a><\/p>\n<p>Now, let\u2019s see why the entire header is important to an email.<\/p>\n<h2>Why Do You Need an Email Header?<\/h2>\n<p>Here are a few reasons why email headers are essential:<\/p>\n<h3>1. Email Headers Protect Against Spam<\/h3>\n<p>The header contains several information fields that help email service providers (ESPs) differentiate spam emails from genuine emails. ESPs analyze the header information to determine the legitimacy of the mail and whether it should be delivered to the intended recipient.<\/p>\n<p>These ESP protocols protect your mail account and personal data from <a href=\"https:\/\/www.forbes.com\/sites\/johndunn\/2020\/10\/31\/phishing-attackers-keep-hijacking-prestigious-university-email-accounts-to-sneak-past-corporate-security\/?sh=e73474244907\">phishing attacks<\/a> and spam emails.<\/p>\n<h3>2.\u00a0 The Message Header Clarifies Sender\/Receiver Information<\/h3>\n<p>Every email header contains the <b>From (<\/b>message source) and <b>To <\/b>fields. There\u2019s also the <b>Subject <\/b>field and <b>Date <\/b>indicator, highlighting the time and date when a new message was sent.<\/p>\n<p>Without the information from the message header, you wouldn\u2019t be able to view source details or identify the email\u2019s sender or receivers &#8211; and you might not be able to determine if the message body (email body) contains legitimate information.<\/p>\n<h3>3. Email Headers Help You Track an Email\u2019s Route<\/h3>\n<p>When a user sends a new message through email, it originates in a sending mail server and travels through several Mail Transfer Agents (MTAs) before reaching the intended recipient.<\/p>\n<p>When this new message passes through an MTA, it\u2019s automatically \u201cstamped\u201d by the mail server with custom header lines like the recipient, date, and time of the mail.<\/p>\n<p>This header information can help the recipient track the email route \u2014 allowing them to check all the MTAs the email passed through to arrive at its destination. This is useful when trying to view message source details and physically track down the origin of malicious and spam emails.<\/p>\n<p>But that\u2019s not all.<\/p>\n<p id=\"howto\">If you expand the email header, you can even obtain the IP address of the sender to track the message source further.<\/p>\n<p><a href=\"#this\"><b>Back to contents<\/b><\/a><\/p>\n<h2 id=\"gmail\">How to Access Your Email Header (Step-by-Step Guide)<\/h2>\n<p>Here\u2019s a step-by-step look at how you can view a complete email header on email apps like Gmail, Microsoft Outlook and Yahoo Mail:<\/p>\n<h3>1. How to View the Full Email Header in Gmail<\/h3>\n<p>Here\u2019s how you can view header details in Gmail (Not applicable to the Google apps on mobile devices):<\/p>\n<p><strong>Step 1<br \/>\n<\/strong>Open the Gmail webmail client on a new tab and click on the mail for which you want to see the message header.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-18607\" style=\"border: 1px solid #000000;\" src=\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Test-message.png\" alt=\"Test message\" width=\"550\" height=\"236\" srcset=\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Test-message.png 1024w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Test-message-300x129.png 300w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Test-message-768x330.png 768w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Test-message-24x10.png 24w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Test-message-36x15.png 36w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Test-message-48x21.png 48w\" sizes=\"auto, (max-width: 550px) 100vw, 550px\" \/><\/p>\n<p><strong>Step 2<br \/>\n<\/strong>When the message body is visible, click on the <b>three dots<\/b> next to the <b>Reply<\/b><b> button<\/b> to open the menu.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-18608\" style=\"border: 1px solid #000000;\" src=\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Three-dots-icon-1.png\" alt=\"Three dots icon\" width=\"550\" height=\"329\" srcset=\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Three-dots-icon-1.png 1024w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Three-dots-icon-1-300x179.png 300w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Three-dots-icon-1-768x459.png 768w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Three-dots-icon-1-24x14.png 24w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Three-dots-icon-1-36x22.png 36w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Three-dots-icon-1-48x29.png 48w\" sizes=\"auto, (max-width: 550px) 100vw, 550px\" \/><\/p>\n<p>Then, select <b>Show Original<\/b> in the drop-down menu.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-18609\" style=\"border: 1px solid #000000;\" src=\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Show-original.png\" alt=\"Show original\" width=\"550\" height=\"329\" srcset=\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Show-original.png 1024w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Show-original-300x179.png 300w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Show-original-768x459.png 768w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Show-original-24x14.png 24w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Show-original-36x22.png 36w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Show-original-48x29.png 48w\" sizes=\"auto, (max-width: 550px) 100vw, 550px\" \/><\/p>\n<p><strong>Step 3<br \/>\n<\/strong>The long header will display in a new window in its original HTML format. It will show some header field details like the IP address, authentication results, DKIM signature, and the MIME-version.<\/p>\n<p>If you want to download and view header details separately, click on <b>Download Original<\/b>.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" id=\"outlook\" class=\"aligncenter wp-image-18610\" style=\"border: 1px solid #000000;\" src=\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Download-original.png\" alt=\"Download original\" width=\"550\" height=\"273\" srcset=\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Download-original.png 1024w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Download-original-300x149.png 300w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Download-original-768x381.png 768w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Download-original-24x12.png 24w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Download-original-36x18.png 36w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Download-original-48x24.png 48w\" sizes=\"auto, (max-width: 550px) 100vw, 550px\" \/><\/p>\n<p><a href=\"#this\"><b>Back to contents<\/b><\/a><\/p>\n<h3>2. How to View the Full Email Header in Microsoft Outlook<\/h3>\n<p>Here\u2019s how you can view your email header in the Microsoft Outlook email client:<\/p>\n<p><strong>Step 1<br \/>\n<\/strong>Double click and open the mail for which you want to view header details.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-18611\" style=\"border: 1px solid #000000;\" src=\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Header-details.png\" alt=\"Header details\" width=\"550\" height=\"243\" srcset=\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Header-details.png 1024w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Header-details-300x132.png 300w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Header-details-768x339.png 768w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Header-details-24x11.png 24w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Header-details-36x16.png 36w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Header-details-48x21.png 48w\" sizes=\"auto, (max-width: 550px) 100vw, 550px\" \/><\/p>\n<p>It will open in a new window.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-18612\" style=\"border: 1px solid #000000;\" src=\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/New-window.png\" alt=\"New window\" width=\"550\" height=\"296\" srcset=\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/New-window.png 1024w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/New-window-300x162.png 300w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/New-window-768x414.png 768w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/New-window-24x13.png 24w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/New-window-36x19.png 36w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/New-window-48x26.png 48w\" sizes=\"auto, (max-width: 550px) 100vw, 550px\" \/><\/p>\n<p><strong>Step 2<br \/>\n<\/strong>Click on <b>File<\/b>, situated right next to the message tab to open the file menu.<\/p>\n<p>When you can view menu details, click on <b>Properties <\/b>at the bottom of the window.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-18613\" style=\"border: 1px solid #000000;\" src=\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Properties-option.png\" alt=\"Properties option\" width=\"550\" height=\"296\" srcset=\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Properties-option.png 1024w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Properties-option-300x162.png 300w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Properties-option-768x414.png 768w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Properties-option-24x13.png 24w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Properties-option-36x19.png 36w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Properties-option-48x26.png 48w\" sizes=\"auto, (max-width: 550px) 100vw, 550px\" \/><\/p>\n<p>You can find the header information like the IP address of the sender in the <b>Internet headers<\/b> section of the dialog box.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" id=\"yahoo\" class=\"aligncenter wp-image-18614\" style=\"border: 1px solid #000000;\" src=\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Internet-headers.png\" alt=\"Internet headers\" width=\"550\" height=\"350\" srcset=\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Internet-headers.png 971w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Internet-headers-300x191.png 300w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Internet-headers-768x489.png 768w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Internet-headers-24x15.png 24w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Internet-headers-36x23.png 36w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Internet-headers-48x31.png 48w\" sizes=\"auto, (max-width: 550px) 100vw, 550px\" \/><\/p>\n<p><a href=\"#this\"><b>Back to contents<\/b><\/a><\/p>\n<h3>3. How to View the Full Email Header in Yahoo Mail<\/h3>\n<p>Here\u2019s how to view the entire message header in Yahoo Mail:<\/p>\n<p><strong>Step 1<br \/>\n<\/strong>Click and open the email for which you want to see the entire header.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-18615\" style=\"border: 1px solid #000000;\" src=\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Yahoo-email-header-1024x570.png\" alt=\"Yahoo email header\" width=\"550\" height=\"306\" srcset=\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Yahoo-email-header-1024x570.png 1024w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Yahoo-email-header-300x167.png 300w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Yahoo-email-header-768x428.png 768w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Yahoo-email-header-24x13.png 24w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Yahoo-email-header-36x20.png 36w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Yahoo-email-header-48x27.png 48w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Yahoo-email-header.png 1034w\" sizes=\"auto, (max-width: 550px) 100vw, 550px\" \/><\/p>\n<p><strong>Step 2<br \/>\n<\/strong>Click on the <b>three dots<\/b> next to the <b>Spam<\/b> button on the top right.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-18617\" style=\"border: 1px solid #000000;\" src=\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/More-option.png\" alt=\"More option\" width=\"550\" height=\"315\" srcset=\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/More-option.png 991w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/More-option-300x172.png 300w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/More-option-768x439.png 768w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/More-option-24x14.png 24w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/More-option-36x21.png 36w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/More-option-48x27.png 48w\" sizes=\"auto, (max-width: 550px) 100vw, 550px\" \/><\/p>\n<p>Then click <b>View raw message<\/b> in the drop-down menu to see the internet header.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-18618\" style=\"border: 1px solid #000000;\" src=\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/View-raw-message.png\" alt=\"View raw message\" width=\"550\" height=\"315\" srcset=\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/View-raw-message.png 991w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/View-raw-message-300x172.png 300w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/View-raw-message-768x439.png 768w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/View-raw-message-24x14.png 24w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/View-raw-message-36x21.png 36w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/View-raw-message-48x27.png 48w\" sizes=\"auto, (max-width: 550px) 100vw, 550px\" \/><\/p>\n<p>The mail header will then open in a new window.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" id=\"whatare\" class=\"aligncenter wp-image-18619\" style=\"border: 1px solid #000000;\" src=\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/New-window-2.png\" alt=\"New window 2\" width=\"550\" height=\"341\" srcset=\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/New-window-2.png 811w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/New-window-2-300x186.png 300w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/New-window-2-768x476.png 768w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/New-window-2-24x15.png 24w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/New-window-2-36x22.png 36w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/New-window-2-48x30.png 48w\" sizes=\"auto, (max-width: 550px) 100vw, 550px\" \/><\/p>\n<p><a href=\"#this\"><b>Back to contents<\/b><\/a><\/p>\n<h2>What Are the Different Aspects of an Email Header?<\/h2>\n<p>Let\u2019s take a look at the technical aspects of the entire header and what they mean:<\/p>\n<ol>\n<li><a href=\"#from\">From<\/a><\/li>\n<li><a href=\"#to\">To<\/a><\/li>\n<li><a href=\"#date\">Date<\/a><\/li>\n<li><a href=\"#subject\">Subject<\/a><\/li>\n<li><a href=\"#return\">Return-Path<\/a><\/li>\n<li><a href=\"#domain\">Domain Key and DKIM Signatures<\/a><\/li>\n<li><a href=\"#message\">Message-ID<\/a><\/li>\n<li><a href=\"#mime\">MIME-Version<\/a><\/li>\n<li><a href=\"#received\">Received<\/a><\/li>\n<li><a href=\"#x\">X-Spam Status<\/a><\/li>\n<\/ol>\n<p>And here\u2019s where each aspect is located in an email header:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" id=\"from\" class=\"aligncenter wp-image-18620\" style=\"border: 1px solid #000000;\" src=\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Aspects-of-email-header.png\" alt=\"Aspects of email header\" width=\"488\" height=\"552\" srcset=\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Aspects-of-email-header.png 903w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Aspects-of-email-header-265x300.png 265w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Aspects-of-email-header-768x871.png 768w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Aspects-of-email-header-21x24.png 21w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Aspects-of-email-header-32x36.png 32w, https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2021\/11\/Aspects-of-email-header-42x48.png 42w\" sizes=\"auto, (max-width: 488px) 100vw, 488px\" \/><\/p>\n<p>Let\u2019s break each element of the entire message header down:<\/p>\n<h3 id=\"to\">1. From<\/h3>\n<p>The <b>From <\/b>field of the internet header indicates the name and email address of the sender.<\/p>\n<h3>2. To<\/h3>\n<p>This field of the mail header contains the email\u2019s receiver\u2019s details.<\/p>\n<p>It includes their name and their mail address. Fields like <b id=\"date\">CC <\/b>(carbon copy) and <b>BCC <\/b>(blind carbon copy) also fall under this category as they all include details of your recipients.<\/p>\n<p><em><b>If you want to find out more about carbon <\/b><b>copy<\/b><b> and blind carbon <\/b><b>copy<\/b><b>, check out <\/b><a href=\"https:\/\/www.gmass.co\/blog\/how-to-cc-in-gmail\/\"><b>how to use CC and BCC<\/b><\/a><b>.<\/b><\/em><\/p>\n<h3>3. Date<\/h3>\n<p>This is the timestamp that shows when the email was sent.<br \/>\nIn Gmail, it usually follows the format of <b id=\"subject\">\u201cday dd month yyyy hh:mm:ss.\u201d<\/b><\/p>\n<p>So if an email had been sent on the 16th of November, 2021, at 4:57:23 PM, it would show as Wed, 16 Nov 2021 16:57:23.<\/p>\n<h3 id=\"return\">4. Subject<\/h3>\n<p>The <b>Subject <\/b>mentions the topic of the email. It summarizes the content of the entire message body.<\/p>\n<h3 id=\"domain\">5. Return-Path<\/h3>\n<p>This mail header field is also known as <b>Reply<\/b><b>-To<\/b>. If you reply to an email, it will go to the address mentioned in the <b>Return-Path<\/b> field.<\/p>\n<h3 id=\"message\">6. Domain Key and DKIM Signatures<\/h3>\n<p>The <b>Domain Key<\/b> and <b>Domain Key Identified <\/b><b>Mail<\/b><b> (<\/b><b>DKIM<\/b><b>)<\/b> are email signatures that help email service providers identify and authenticate your emails, similar to SPF signatures.<\/p>\n<h3 id=\"mime\">7. Message-ID<\/h3>\n<p>The <b>Message ID<\/b> header field is a unique combination of letters and numbers that identifies each mail. No two emails will have the same <b>Message ID<\/b>.<\/p>\n<h3>8. MIME-Version<\/h3>\n<p><b id=\"received\">Multipurpose Internet <\/b><b>Mail<\/b><b> Extensions<\/b><b> (MIME)<\/b> is an internet standard of encoding. It converts non-text content like images, videos, and other attachments into text so they can be attached to an email and sent through SMTP (Simple Mail Transfer Protocol).<\/p>\n<h3>9. Received<\/h3>\n<p>The <b id=\"x\">Received <\/b>field lists each mail server that an email went through before arriving in the recipient\u2019s inbox. It\u2019s listed in a reverse chronological order \u2014 where the mail server on the top is the last server the email message went through, and the bottom is where the email originated.<\/p>\n<h3>10. X-Spam Status<\/h3>\n<p>The <b>X-<\/b><b>Spam<\/b><b> Status<\/b> shows you the spam score of an email message.<\/p>\n<p>First, it\u2019ll highlight if a message is classified as spam.<\/p>\n<p>Then, the spam score of the email is shown, as well as the spam threshold for the email.<\/p>\n<p>An email can either meet the spam threshold of an inbox or exceed it. If it\u2019s too spammy and <b>exceeds <\/b>the threshold, it will automatically be classified as spam and sent to the spam folder.<\/p>\n<p><a href=\"#this\"><b>Back to contents<\/b><\/a><\/p>\n<h2>Wrapping Up<\/h2>\n<p>Email headers play a crucial role in ensuring that your emails are delivered successfully. They\u2019re also key in helping you determine the origin and legitimacy of your emails.<\/p>\n<p>You can check out everything I\u2019ve written in this article to understand why email headers are important and how you can access them on various email clients.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>An email header is the part of an email that contains information about the mail sender, receiver, and subject. Each email has a custom header that includes technical\u2026<\/p>\n","protected":false},"author":2,"featured_media":15236,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1954],"tags":[],"class_list":["post-15088","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-email-deliverability"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\r\n<title>What Is an Email Header? 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