{"id":1500,"date":"2026-07-11T06:28:10","date_gmt":"2026-07-11T06:28:10","guid":{"rendered":"https:\/\/e-warmup.com\/blog\/?p=1500"},"modified":"2026-07-11T15:08:41","modified_gmt":"2026-07-11T15:08:41","slug":"what-is-spf-record-how-it-protect-your-domain","status":"publish","type":"post","link":"https:\/\/e-warmup.com\/blog\/what-is-spf-record-how-it-protect-your-domain\/","title":{"rendered":"What Is SPF Record and How Does It Protect Your Sending Domain?"},"content":{"rendered":"\n<p class=\"has-text-align-left wp-block-paragraph\">Nothing stops someone else from sending an email that looks like it came from you. No lock. No checkpoint. Just an open door, unless you&#8217;ve told inbox providers who&#8217;s actually allowed through it.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">That&#8217;s the entire job of an SPF record. It&#8217;s a small DNS entry, but it decides whether Gmail, Outlook, and every other inbox provider treat your domain as verified or as an open target.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Most people set it up once during onboarding and never think about it again. That&#8217;s usually fine, until a spoofed email lands in a client&#8217;s inbox, or a deliverability audit turns up a record nobody remembers writing.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">What is SPF record, then? This guide covers what an SPF record actually does, what breaks when it&#8217;s missing or wrong, how to read one line by line, and how to check whether yours is actually working.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>SPF in Plain Language<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">An SPF record is a DNS entry that lists every mail server allowed to send email on behalf of your domain. That&#8217;s the whole concept. Nothing more mysterious than a name-tag policy for your domain&#8217;s mail servers.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">SPF stands for Sender Policy Framework. When someone sends an email from your domain, the receiving mail server checks your DNS for this record.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If the sending server is on the list, the email passes. If it isn&#8217;t, the email fails the check, and gets flagged, filtered, or rejected depending on the policy in place.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is one piece of a larger system called email authentication. SPF handles the &#8220;who&#8217;s allowed to send&#8221; question. DKIM and DMARC handle two other questions entirely, and we&#8217;ll get to how they connect shortly.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A basic SPF record looks like this:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>v=spf1 include:_spf.google.com include:sendgrid.net ~all\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Every part of that string means something specific:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>v=spf1<\/code> marks this as an SPF record<\/li>\n\n\n\n<li><code>include:_spf.google.com<\/code> authorizes Google&#8217;s servers<\/li>\n\n\n\n<li><code>include:sendgrid.net<\/code> authorizes SendGrid<\/li>\n\n\n\n<li><code>~all<\/code> sets a soft fail policy for anything not listed<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Most teams don&#8217;t send from just one place. A typical setup might route marketing email through a platform like SendGrid, transactional email through Amazon SES, and everyday business email through <a href=\"https:\/\/support.google.com\/a\/answer\/33786\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Google Workspace<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Each of those needs its own <code>include<\/code> statement inside the same record. That&#8217;s where things start getting messy for teams managing SPF manually, because every new tool added to the stack means going back into DNS and editing the record again.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">One rule that trips up a lot of teams: a domain can only have one SPF record. Not one per sending service, one total. Every authorized service goes inside that single record using multiple <code>include<\/code> statements.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/e-warmup.com\/blog\/wp-content\/uploads\/2026\/07\/one-spf-record-inner-image-1024x576.webp\" alt=\"\" class=\"wp-image-1504\" srcset=\"https:\/\/e-warmup.com\/blog\/wp-content\/uploads\/2026\/07\/one-spf-record-inner-image-1024x576.webp 1024w, https:\/\/e-warmup.com\/blog\/wp-content\/uploads\/2026\/07\/one-spf-record-inner-image-300x169.webp 300w, https:\/\/e-warmup.com\/blog\/wp-content\/uploads\/2026\/07\/one-spf-record-inner-image-768x432.webp 768w, https:\/\/e-warmup.com\/blog\/wp-content\/uploads\/2026\/07\/one-spf-record-inner-image-1536x864.webp 1536w, https:\/\/e-warmup.com\/blog\/wp-content\/uploads\/2026\/07\/one-spf-record-inner-image.webp 1672w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What Happens When SPF Is Missing or Wrong<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">When SPF is missing, inbox providers have no way to confirm your identity. They don&#8217;t know if an email really came from your servers or from someone spoofing your domain, so they treat the message with more suspicion by default.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Here&#8217;s what that actually looks like in practice:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Authentication checks fail on every outgoing email, even legitimate ones<\/li>\n\n\n\n<li>Inbox providers can&#8217;t verify sender identity, so trust starts lower<\/li>\n\n\n\n<li>Spoofed emails using your domain go unchecked, since nothing blocks them<\/li>\n\n\n\n<li>Your email domain reputation takes a hit, because unauthenticated domains get treated as lower trust from the start<\/li>\n\n\n\n<li>Cold outreach gets filtered more aggressively, since new domains already carry less trust<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A domain with no SPF record isn&#8217;t automatically blocked. It&#8217;s just starting every conversation with an inbox provider at a disadvantage, and that disadvantage compounds over time.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Duplicate or broken SPF records cause a similar problem. Two SPF TXT records on the same domain, for instance, don&#8217;t get merged. Providers see conflicting instructions and often just discard both.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">That means you end up with no working authentication even though you technically published a record. This is one of the most common issues we see when auditing a domain for the first time. Someone added a new tool, pasted in a new SPF line as a separate record instead of editing the existing one, and now neither record is being honored.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is also where SPF, DKIM, and DMARC start working together. SPF verifies the sending server. DKIM verifies the message wasn&#8217;t altered in transit using a cryptographic signature. DMARC tells providers what to do when either a check fails, whether to monitor, quarantine, or reject.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">None of the three replaces the others. A domain running SPF DKIM DMARC together has a complete authentication setup, and inbox providers increasingly expect that full stack as part of their <a href=\"https:\/\/support.google.com\/mail\/answer\/81126\" rel=\"nofollow noopener\" target=\"_blank\">email authentication requirements<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you haven&#8217;t set up all three yet, our <a href=\"https:\/\/e-warmup.com\/blog\/spf-dkim-dmarc-full-email-authentication-guide\/\"><strong>full guide to SPF, DKIM, and DMARC<\/strong><\/a> walks through each one and how they fit together. A domain running SPF alone has one layer of a three-layer system.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/e-warmup.com\/blog\/wp-content\/uploads\/2026\/07\/spf-dkim-dmarc-1024x576.webp\" alt=\"\" class=\"wp-image-1505\" srcset=\"https:\/\/e-warmup.com\/blog\/wp-content\/uploads\/2026\/07\/spf-dkim-dmarc-1024x576.webp 1024w, https:\/\/e-warmup.com\/blog\/wp-content\/uploads\/2026\/07\/spf-dkim-dmarc-300x169.webp 300w, https:\/\/e-warmup.com\/blog\/wp-content\/uploads\/2026\/07\/spf-dkim-dmarc-768x432.webp 768w, https:\/\/e-warmup.com\/blog\/wp-content\/uploads\/2026\/07\/spf-dkim-dmarc-1536x864.webp 1536w, https:\/\/e-warmup.com\/blog\/wp-content\/uploads\/2026\/07\/spf-dkim-dmarc.webp 1672w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Standard<\/th><th>Question It Answers<\/th><\/tr><\/thead><tbody><tr><td>SPF<\/td><td>Is this server allowed to send from this domain?<\/td><\/tr><tr><td>DKIM<\/td><td>Was this message altered in transit?<\/td><\/tr><tr><td>DMARC<\/td><td>What should happen when SPF or DKIM fails?<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">There&#8217;s a reason inbox providers lean on all three instead of just one. SPF alone can be spoofed around in certain forwarding scenarios. DKIM alone doesn&#8217;t tell a receiving server what to do with a failure.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">DMARC alone has nothing to enforce without SPF or DKIM underneath it. Each one closes a gap the other two leave open, which is why a domain reputation built on SPF alone will always have a ceiling.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Reading and Building a Basic SPF Record<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Reading an SPF record gets easier once you know the pattern. Start from the left. <code>v=spf1<\/code> opens it. Everything after that is a mechanism, and <code>all<\/code> at the end closes it.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The most common mechanisms:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>include:<\/code> authorizes another domain&#8217;s sending infrastructure, like Google Workspace or SendGrid<\/li>\n\n\n\n<li><code>ip4:<\/code> and <code>ip6:<\/code> authorize specific IP addresses directly<\/li>\n\n\n\n<li><code>a<\/code> and <code>mx<\/code> authorize servers listed in your domain&#8217;s A or MX records<\/li>\n\n\n\n<li><code>~all<\/code> is a soft fail, unlisted servers get flagged but usually still delivered<\/li>\n\n\n\n<li><code>-all<\/code> is a hard fail, unlisted servers get rejected outright<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A couple of older mechanisms are worth knowing but not using. <code>ptr<\/code> used to authorize servers based on reverse DNS lookups, but it&#8217;s slow and considered deprecated by most current SPF guidance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><code>redirect<\/code> points to another domain&#8217;s SPF record entirely rather than including it. It&#8217;s useful in specific multi-domain setups but easy to misuse if you&#8217;re not sure what it&#8217;s doing.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For a domain that&#8217;s just getting its authentication set up, <code>~all<\/code> is the safer starting point. It gives you room to catch a sending service you forgot to include before you start actually blocking mail. Once every legitimate source is confirmed and passing, <code>-all<\/code> closes the gap for good.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">There&#8217;s a technical limit worth knowing about too. SPF allows a maximum of 10 DNS lookups per record, a rule defined in <a href=\"https:\/\/datatracker.ietf.org\/doc\/html\/rfc7208\" rel=\"nofollow noopener\" target=\"_blank\">RFC 7208<\/a>, the formal SPF specification.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Each <code>include<\/code> statement counts toward that limit, and each of those included domains can have its own nested includes. Stack too many services in one record and you can exceed the limit without realizing it.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">That causes the whole check to fail regardless of what&#8217;s actually listed. This is a common failure point for companies that have grown their tool stack over a few years without ever cleaning up the SPF record behind it.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/e-warmup.com\/blog\/wp-content\/uploads\/2026\/07\/before-publishing-an-spf-record-1024x576.webp\" alt=\"\" class=\"wp-image-1506\" srcset=\"https:\/\/e-warmup.com\/blog\/wp-content\/uploads\/2026\/07\/before-publishing-an-spf-record-1024x576.webp 1024w, https:\/\/e-warmup.com\/blog\/wp-content\/uploads\/2026\/07\/before-publishing-an-spf-record-300x169.webp 300w, https:\/\/e-warmup.com\/blog\/wp-content\/uploads\/2026\/07\/before-publishing-an-spf-record-768x432.webp 768w, https:\/\/e-warmup.com\/blog\/wp-content\/uploads\/2026\/07\/before-publishing-an-spf-record-1536x864.webp 1536w, https:\/\/e-warmup.com\/blog\/wp-content\/uploads\/2026\/07\/before-publishing-an-spf-record.webp 1672w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Confirm no existing SPF record is already published<\/li>\n\n\n\n<li>Count total DNS lookups across all include statements<\/li>\n\n\n\n<li>Verify every sending service you actually use is listed<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>How to Run an SPF Record Check on Your Domain<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Before publishing anything, running an SPF record check on your domain tells you three things: whether a record already exists, whether it&#8217;s malformed, and whether it&#8217;s hitting the lookup limit.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Skipping this step is how teams end up with duplicate records or broken syntax that nobody catches until deliverability drops.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">An SPF record check typically walks through the same process:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Query the domain&#8217;s TXT records and isolate the one starting with <code>v=spf1<\/code><\/li>\n\n\n\n<li>Parse each mechanism in the record to confirm valid syntax<\/li>\n\n\n\n<li>Count total DNS lookups across all nested includes<\/li>\n\n\n\n<li>Flag anything approaching or exceeding the 10-lookup limit<\/li>\n\n\n\n<li>Confirm there&#8217;s exactly one SPF record, not two competing ones<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This matters more than it sounds like it should. A record that looks fine to the eye can still fail silently if it&#8217;s the second SPF TXT record on the domain, or if one of the nested includes has ballooned past the lookup ceiling since it was first set up.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Running a check periodically, not just once at setup, catches these issues before they show up as a deliverability problem instead of a DNS problem.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Domains that change sending tools often, adding a new CRM integration, switching email marketing platforms, or bringing on a new outreach tool, are the ones most likely to drift out of sync.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Every new service that sends on your behalf needs to be added to the same SPF record, and every check is a chance to catch a tool that was integrated without anyone updating DNS.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Frequently Asked Questions<\/strong><\/h2>\n\n\n<div id=\"rank-math-faq\" class=\"rank-math-block\">\n<div class=\"rank-math-list \">\n<div id=\"faq-question-1783599400069\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \"><strong>What is an SPF record?<\/strong><\/h3>\n<div class=\"rank-math-answer \">\n\n<p>An SPF record is a DNS TXT entry that lists every mail server authorized to send email on behalf of a domain. Receiving mail servers check this record to confirm whether an incoming email actually came from an approved source.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-question-1783599415883\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \"><strong>What does SPF stand for?<\/strong><\/h3>\n<div class=\"rank-math-answer \">\n\n<p>SPF stands for Sender Policy Framework. It&#8217;s one of three core email authentication standards, alongside DKIM and DMARC, that together verify sender identity and message integrity.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-question-1783599427999\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \"><strong>How do I check if my domain has an SPF record?<\/strong><\/h3>\n<div class=\"rank-math-answer \">\n\n<p>Running an SPF record check through a DNS lookup tool shows whether a record exists, what it contains, and whether it&#8217;s correctly formatted. This should be the first step before publishing or editing any SPF entry.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-question-1783599441622\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \"><strong>What&#8217;s the difference between SPF, DKIM, and DMARC?<\/strong><\/h3>\n<div class=\"rank-math-answer \">\n\n<p>SPF confirms the sending server is authorized. DKIM confirms the message wasn&#8217;t altered in transit using a cryptographic signature. DMARC sets the policy for what happens when either check fails. All three work together as a complete email authentication setup.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-question-1783599454016\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \"><strong>Can a domain have more than one SPF record?<\/strong><\/h3>\n<div class=\"rank-math-answer \">\n\n<p>No. A domain can only have one SPF TXT record. Publishing more than one causes providers to discard both, which breaks authentication even if each individual record looks correct.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-question-1783599468433\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \"><strong>What happens if I don&#8217;t have an SPF record?<\/strong><\/h3>\n<div class=\"rank-math-answer \">\n\n<p>Without SPF, inbox providers can&#8217;t confirm whether your emails actually came from your servers. This lowers your email domain reputation, increases the risk of your domain being spoofed, and makes cold outreach more likely to get filtered.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-question-1783599486635\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \"><strong>What is the difference between ~all and -all in SPF?<\/strong><\/h3>\n<div class=\"rank-math-answer \">\n\n<p><code>~all<\/code> is a soft fail, unlisted servers get flagged but usually still delivered. <code>-all<\/code> is a hard fail, unlisted servers get rejected outright. Most teams start with <code>~all<\/code> and move to <code>-all<\/code> once every legitimate sending source is confirmed.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-question-1783599503382\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \"><strong>Why does my SPF record stop working after I add a new tool?<\/strong><\/h3>\n<div class=\"rank-math-answer \">\n\n<p>Adding a new sending service without updating the existing SPF record, or worse, publishing a second SPF record instead of editing the first, is one of the most common causes of authentication suddenly breaking. Every new tool needs to be added inside the single existing record.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-question-1783599519448\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \"><strong>Does having SPF guarantee my emails won&#8217;t go to spam?<\/strong><\/h3>\n<div class=\"rank-math-answer \">\n\n<p>No. SPF is one layer of authentication, not a complete deliverability solution. Sender reputation, domain warmup history, and content quality all affect inbox placement independently of whether SPF is correctly set up.<\/p>\n\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Bringing It Together<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">An SPF record on its own answers one narrow question: which servers can send as this domain. That&#8217;s necessary, but it&#8217;s not the whole picture.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Domain reputation, DKIM alignment, and DMARC policy all sit on top of that foundation, and each one closes a gap the others leave open.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Getting SPF right is usually the first fix that shows up in a deliverability audit, mostly because it&#8217;s the one most teams set up once, years ago, and never revisit. A quick SPF record check now can save a lot of guesswork later, especially before a new sending domain goes live or a new tool gets added to the stack.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you&#8217;re dealing with authentication issues or just want to confirm your setup is clean, E-Warmup&#8217;s free SPF generator builds a correct record in under a minute, checks for existing entries first, and flags duplicate records before they cause problems. Start for free.<\/p>\n\n\n\n<div class=\"wp-block-uagb-call-to-action uagb-block-ae4a96c5 wp-block-button\"><div class=\"uagb-cta__wrap\"><h3 class=\"uagb-cta__title\">Generate Your SPF\u00a0Record in Seconds<\/h3><p class=\"uagb-cta__desc\">Add the services that send mail for your domain and generate a clean SPF TXT record to help prevent spoofing.<\/p><\/div><div class=\"uagb-cta__buttons\"><a href=\"https:\/\/e-warmup.com\/free-tools\/spf-record-generator\" class=\"uagb-cta__button-link-wrapper wp-block-button__link\" target=\"_blank\" rel=\"noopener noreferrer\">Use For Free<svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\"><path d=\"M504.3 273.6l-112.1 104c-6.992 6.484-17.18 8.218-25.94 4.406c-8.758-3.812-14.42-12.45-14.42-21.1L351.9 288H32C14.33 288 .0002 273.7 .0002 255.1S14.33 224 32 224h319.9l0-72c0-9.547 5.66-18.19 14.42-22c8.754-3.809 18.95-2.075 25.94 4.41l112.1 104C514.6 247.9 514.6 264.1 504.3 273.6z\"><\/path><\/svg><\/a><\/div><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>What is SPF record? Learn how it protects your email domain reputation and how to run a quick SPF record check, free.<\/p>\n","protected":false},"author":3,"featured_media":1502,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[6,5],"tags":[17,13,14,20],"class_list":["post-1500","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-email-deliverability","category-e-warmup-insights","tag-email-authentication-spf-dkim-dmarc","tag-email-deliverability","tag-email-warmup","tag-spam-filter-testing"],"uagb_featured_image_src":{"full":["https:\/\/e-warmup.com\/blog\/wp-content\/uploads\/2026\/07\/What-Is-an-SPF-Record-and-How-Does-It-Protect-Your-Sending-Domain_.webp",1600,900,false],"thumbnail":["https:\/\/e-warmup.com\/blog\/wp-content\/uploads\/2026\/07\/What-Is-an-SPF-Record-and-How-Does-It-Protect-Your-Sending-Domain_-150x150.webp",150,150,true],"medium":["https:\/\/e-warmup.com\/blog\/wp-content\/uploads\/2026\/07\/What-Is-an-SPF-Record-and-How-Does-It-Protect-Your-Sending-Domain_-300x169.webp",300,169,true],"medium_large":["https:\/\/e-warmup.com\/blog\/wp-content\/uploads\/2026\/07\/What-Is-an-SPF-Record-and-How-Does-It-Protect-Your-Sending-Domain_-768x432.webp",768,432,true],"large":["https:\/\/e-warmup.com\/blog\/wp-content\/uploads\/2026\/07\/What-Is-an-SPF-Record-and-How-Does-It-Protect-Your-Sending-Domain_-1024x576.webp",1024,576,true],"1536x1536":["https:\/\/e-warmup.com\/blog\/wp-content\/uploads\/2026\/07\/What-Is-an-SPF-Record-and-How-Does-It-Protect-Your-Sending-Domain_-1536x864.webp",1536,864,true],"2048x2048":["https:\/\/e-warmup.com\/blog\/wp-content\/uploads\/2026\/07\/What-Is-an-SPF-Record-and-How-Does-It-Protect-Your-Sending-Domain_.webp",1600,900,false]},"uagb_author_info":{"display_name":"Romeo Nicholas Rozario","author_link":"https:\/\/e-warmup.com\/blog\/author\/romeo-rozario\/"},"uagb_comment_info":0,"uagb_excerpt":"What is SPF record? 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