{"id":262957,"date":"2025-11-25T01:33:26","date_gmt":"2025-11-25T06:33:26","guid":{"rendered":"https:\/\/monday.com\/blog\/?p=262957"},"modified":"2025-11-25T01:33:26","modified_gmt":"2025-11-25T06:33:26","slug":"email-authentication","status":"publish","type":"post","link":"https:\/\/monday.com\/blog\/monday-campaigns\/email-authentication\/","title":{"rendered":"Email authentication fundamentals: SPF, DKIM, and DMARC"},"content":{"rendered":"","protected":false},"excerpt":{"rendered":"","protected":false},"author":268,"featured_media":262961,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"pages\/cornerstone-primary.php","format":"standard","meta":{"_acf_changed":false,"_yoast_wpseo_title":"Email Authentication: How SPF, DKIM, and DMARC Work","_yoast_wpseo_metadesc":"Email authentication protects your domain by verifying sender identity and preventing spoofing, phishing, and delivery issues. Learn how it works.","monday_item_id":11238559829,"monday_board_id":0,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[14082],"tags":[],"class_list":["post-262957","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-monday-campaigns"],"acf":{"sections":[{"acf_fc_layout":"content_1","blocks":[{"main_heading":"","content_block":[{"acf_fc_layout":"text","content":"<p>A great email only works if it reaches the inbox. As Gmail, Yahoo, and other providers enforce stricter sender requirements, deliverability has shifted from a creative challenge to a technical one \u2014 and authentication is now one of the biggest factors influencing whether your message gets seen.<\/p>\n<p>This guide breaks down the three core authentication protocols \u2014 SPF, DKIM, and DMARC \u2014 and how they work together to protect your domain, strengthen your sender reputation, and improve inbox placement. You\u2019ll also learn the essential setup steps and common pitfalls to avoid so your campaigns consistently reach the right audience.<\/p>\n<a class=\"cta-button blue-button\" aria-label=\"Try monday campaigns\" href=\"https:\/\/auth.monday.com\/p\/marketing_campaigns\/users\/sign_up_new\" target=\"_blank\">Try monday campaigns<\/a>\n"}]},{"main_heading":"Key takeaways","content_block":[{"acf_fc_layout":"text","content":"<ul>\n<li>Email authentication (SPF, DKIM, and DMARC) is now essential for reaching inboxes and protecting your brand from spoofing attacks.<\/li>\n<li>Start with monitoring-only DMARC policies, then gradually increase enforcement to avoid blocking legitimate emails during setup.<\/li>\n<li>Proper authentication directly improves deliverability rates, builds recipient trust, and increases email engagement and conversions.<\/li>\n<li>Test your authentication setup regularly using online validators and monitor DMARC reports to catch issues before they hurt campaigns.<\/li>\n<li>Automate the entire authentication process with smart software like monday campaigns, featuring step-by-step setup, real-time monitoring, and CRM integration.<\/li>\n<\/ul>\n"}]},{"main_heading":"What is email authentication?","content_block":[{"acf_fc_layout":"text","content":"<p>Email authentication is a set of technical standards that verify your identity as an email sender. This means receiving servers can confirm you&#8217;re actually who you claim to be \u2014 not someone pretending to be your brand.<\/p>\n<p>Think of it like showing ID at the airport. Just as TSA checks your license matches your boarding pass, email servers check that your messages come from authorized sources. Without this verification, anyone could send emails pretending to be your company. In the FBI\u2019s most recent IC3 report, <a href=\"https:\/\/www.fbi.gov\/news\/press-releases\/fbi-releases-annual-internet-crime-report\" target=\"_blank\" rel=\"noopener\">business email compromise<\/a> resulted in over $2.77 billion in reported losses, making it one of the costliest cybercrime categories worldwide.<\/p>\n<p>The 3 main authentication protocols work together to protect your emails:<\/p>\n<ol>\n<li><strong>SPF (Sender Policy Framework):<\/strong> Lists which servers can send email for your domain<\/li>\n<li><strong>DKIM (DomainKeys Identified Mail):<\/strong> Adds a digital signature proving your email hasn&#8217;t been tampered with<\/li>\n<li><strong>DMARC (Domain-based Message Authentication, Reporting &amp; Conformance):<\/strong> Tells receiving servers what to do when authentication fails<\/li>\n<\/ol>\n<h3>SPF vs. DKIM vs. DMARC: Quick-look chart<\/h3>\n<p><span style=\"color: #000000;\">SPF and DKIM authenticate your emails, while DMARC adds policy enforcement and visibility. Using all 3 protocols together is required to protect your brand, improve inbox placement, and keep up with modern sender requirements.<\/span><\/p>\n\n<table id=\"tablepress-1057\" class=\"tablepress tablepress-id-1057 bold-left-column\">\n<thead>\n<tr class=\"row-1\">\n\t<th class=\"column-1\">Protocol<\/th><th class=\"column-2\">What it verifies<\/th><th class=\"column-3\">Protects against<\/th><th class=\"column-4\">Who enforces it<\/th><th class=\"column-5\">Required for Gmail\/Yahoo?<\/th><th class=\"column-6\">Difficulty to set up<\/th>\n<\/tr>\n<\/thead>\n<tbody class=\"row-striping row-hover\">\n<tr class=\"row-2\">\n\t<td class=\"column-1\">SPF<\/td><td class=\"column-2\">Whether the sending server\/IP is authorized to send for your domain<\/td><td class=\"column-3\">Server spoofing, unauthorized senders<\/td><td class=\"column-4\">Domain owner (via DNS)<\/td><td class=\"column-5\">\u2714 Yes<\/td><td class=\"column-6\">Easy<\/td>\n<\/tr>\n<tr class=\"row-3\">\n\t<td class=\"column-1\">DKIM<\/td><td class=\"column-2\">Whether the email content was tampered with<\/td><td class=\"column-3\">Message tampering + domain spoofing<\/td><td class=\"column-4\">Domain owner + sending platform<\/td><td class=\"column-5\">\u2714 Yes<\/td><td class=\"column-6\">Moderate<\/td>\n<\/tr>\n<tr class=\"row-4\">\n\t<td class=\"column-1\">DMARC<\/td><td class=\"column-2\">Whether SPF\/DKIM align with the visible \u201cFrom\u201d domain and what action to take when they fail<\/td><td class=\"column-3\">Impersonation, phishing using your domain<\/td><td class=\"column-4\">Domain owner<\/td><td class=\"column-5\">\u2714 Required (p=none min.)<\/td><td class=\"column-6\">Moderate<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<!-- #tablepress-1057 from cache -->\n<h3>Gmail and Yahoo sender requirements (2024-25)<\/h3>\n<p>In February 2024, Gmail and Yahoo implemented strict sender requirements that fundamentally changed email deliverability. If you send more than 5,000 emails per day to Gmail or Yahoo addresses, you must now implement all 3 authentication protocols \u2014 no exceptions.<\/p>\n<p>Here&#8217;s what these providers now require:<\/p>\n<ul>\n<li><strong>SPF or DKIM authentication:<\/strong> At least one must pass (both recommended)<\/li>\n<li><strong>DMARC policy:<\/strong> Minimum of p=none, though p=quarantine or p=reject provides better protection<\/li>\n<li><strong>Valid forward and reverse DNS records:<\/strong> Your sending domains must have proper DNS configuration<\/li>\n<li><strong>One-click unsubscribe:<\/strong> Marketing emails must include easy unsubscribe options<\/li>\n<li><strong>Low spam complaint rates:<\/strong> Keep complaints below 0.3% (0.1% recommended)<\/li>\n<\/ul>\n<p>These requirements aren&#8217;t suggestions \u2014 Gmail and Yahoo actively block emails that don&#8217;t comply. Even if you send fewer than 5,000 emails daily, following these standards improves deliverability across all providers. The email landscape has shifted from authentication being a best practice to being mandatory for inbox placement.<\/p>\n"}]},{"main_heading":"3 critical benefits of email authentication for marketers","content_block":[{"acf_fc_layout":"text","content":"<p>Marketing leaders care about results \u2014 <a href=\"https:\/\/monday.com\/blog\/crm-and-sales\/email-open-rate\/\" target=\"_blank\" rel=\"noopener\">email open rates<\/a>, conversions, and ROI. Email authentication directly impacts all 3 by protecting your sender reputation and ensuring messages reach inboxes. It also plays a crucial role in <a href=\"https:\/\/monday.com\/blog\/crm-and-sales\/customer-retention\/\" target=\"_blank\" rel=\"noopener\">customer retention<\/a> by keeping your communication channels secure.<\/p>\n<h3>1. Protect your brand from email spoofing<\/h3>\n<p>Email spoofing happens when criminals send fake emails that look like they&#8217;re from your company. They might send phishing links, fake invoices, or malware using your brand name.<\/p>\n<p>Without authentication, there&#8217;s nothing stopping these attacks. Your customers receive fraudulent emails, lose trust in your brand, and may even suffer financial losses that ultimately lead to <a href=\"https:\/\/monday.com\/blog\/crm-and-sales\/customer-churn\/\" target=\"_blank\" rel=\"noopener\">customer churn<\/a>. Authentication creates a verification system that blocks these impersonation attempts before they reach anyone&#8217;s inbox.<\/p>\n<h3>2. Maximize email deliverability rates<\/h3>\n<p>Gmail, Outlook, and other email providers use authentication as a trust signal. When your emails pass authentication checks, providers know you&#8217;re legitimate and deliver your messages to the inbox.<\/p>\n<p>Without proper authentication, even perfectly crafted marketing emails end up in spam folders, a common frustration given that 48% of senders report they <a href=\"https:\/\/www.mailgun.com\/blog\/deliverability\/state-of-deliverability-takeaways\/\" target=\"_blank\" rel=\"noopener\">struggle to stay out of spam<\/a>. You waste campaign budgets reaching no one while competitors with authenticated emails land in prime inbox real estate.<\/p>\n<h3>3. Build recipient trust and engagement<\/h3>\n<p>Many email clients now show verified sender badges for authenticated emails. Recipients see these trust indicators and feel more confident opening your messages.<\/p>\n<p>Higher confidence leads to higher engagement. When customers trust your emails, they open them, click your links, and boost your <a href=\"https:\/\/monday.com\/blog\/crm-and-sales\/email-conversion-rates\/\" target=\"_blank\" rel=\"noopener\">email conversion rates<\/a>. With built-in authentication features, monday campaigns helps you build this trust automatically.<\/p>\n"}]},{"main_heading":"","content_block":[{"acf_fc_layout":"colored_notification","text":"<p><strong>AI-powered phishing:<\/strong> Why authentication matters more than everCybercriminals now use AI to create convincing phishing emails at scale \u2014 personalized messages that mimic your brand voice, writing style, and even specific employee communication patterns. These AI-generated attacks are harder to spot and more dangerous than ever.<\/p>\n<p>When you properly implement SPF, DKIM, and DMARC, you make it nearly impossible for attackers to send emails that appear to come from your domain. Even the most sophisticated AI-written phishing attempt fails if it can&#8217;t pass authentication checks. Protecting your domain isn&#8217;t just about deliverability anymore \u2014 it&#8217;s about preventing AI-powered fraud that targets your customers and damages your reputation.<\/p>\n","quote":false,"author":"","position":"","avatar":false}]},{"main_heading":"SPF authentication: Your first line of defense","content_block":[{"acf_fc_layout":"text","content":"<p>SPF is a DNS record that lists every server authorized to send email for your domain. When someone receives an email from you, their server checks this list to verify the message came from an approved source.<\/p>\n<h3>How SPF validates sender identity<\/h3>\n<p>Here&#8217;s what happens when you send an email:<\/p>\n<ol>\n<li>Your email leaves your server with your domain in the &#8220;from&#8221; address.<\/li>\n<li>The receiving server sees your domain and looks up your SPF record.<\/li>\n<li>If your sending server is on the approved list, the email passes.<\/li>\n<li>If not, the email might be rejected or marked suspicious.<\/li>\n<\/ol>\n<p>This entire process happens in milliseconds, protecting recipients from fake emails while ensuring your legitimate messages get through.<\/p>\n<h3>Creating an effective SPF record<\/h3>\n<p>An SPF record is a line of text in your DNS settings. A basic record looks like: <code>v=spf1 include:_spf.google.com ~all<\/code><\/p>\n<p>Let&#8217;s break down what each part means:<\/p>\n<ul>\n<li><strong>v=spf1:<\/strong> Tells servers this is an SPF record<\/li>\n<li><strong>include:_spf.google.com:<\/strong> Authorizes Google&#8217;s servers to send for you<\/li>\n<li><strong>~all:<\/strong> Marks unauthorized emails as suspicious (not rejected)<\/li>\n<\/ul>\n<p>You&#8217;ll add different &#8220;include&#8221; statements for each email service you use \u2014 your marketing platform, CRM, support system, and so on.<\/p>\n<h3>SPF best practices for multiple senders<\/h3>\n<p>Most businesses use several email services. Your marketing team uses one platform, sales uses another, and support uses a third. Each needs authorization in your SPF record.<\/p>\n<p>But here&#8217;s the catch: SPF has a 10 DNS lookup limit. Each &#8220;include&#8221; statement counts toward this limit. Go over 10, and your entire SPF record fails.<\/p>\n<p>Smart organizations consolidate services where possible or use specialized SPF flattening services. With straightforward guidance on optimizing your SPF setup, monday campaigns simplifies this.<\/p>\n<a class=\"cta-button blue-button\" aria-label=\"Try monday campaigns\" href=\"https:\/\/auth.monday.com\/p\/marketing_campaigns\/users\/sign_up_new\" target=\"_blank\">Try monday campaigns<\/a>\n"}]},{"main_heading":"DKIM: Securing your email content","content_block":[{"acf_fc_layout":"text","content":"<p>While SPF verifies who sent an email, DKIM verifies the email hasn&#8217;t been changed during delivery. It&#8217;s like a tamper-proof seal on your messages.<\/p>\n<h3>Understanding DKIM signatures<\/h3>\n<p>DKIM uses cryptography to create a unique signature for each email. Your email server creates this signature using a private key, then receiving servers verify it using your public key.<\/p>\n<p>If someone tries to change your email \u2014 even one character \u2014 the signature breaks. The receiving server knows something&#8217;s wrong and can reject or quarantine the message.<\/p>\n<h3>Setting up DKIM for your domain<\/h3>\n<ul>\n<li><strong>Generate a key pair:<\/strong> Create public and private cryptographic keys<\/li>\n<li><strong>Publish the public key:<\/strong> Add it to your DNS records<\/li>\n<li><strong>Configure email signing:<\/strong> Set your email platform to sign outgoing messages<\/li>\n<\/ul>\n<p>Most modern platforms handle this complexity for you. For example, monday campaigns automates the entire DKIM setup process, generating keys and providing simple DNS instructions.<\/p>\n<h3>DKIM key management guidelines<\/h3>\n<p>Strong security requires 2048-bit DKIM keys minimum. Shorter keys are easier to crack, putting your email security at risk.<\/p>\n<p>Rotate your keys annually to maintain security. If a key gets compromised, rotation limits the damage window. Keep private keys secure \u2014 only authorized systems should have access.<\/p>\n"}]},{"main_heading":"DMARC: Unifying your email protection","content_block":[{"acf_fc_layout":"text","content":"<p>DMARC is the conductor of your email authentication orchestra. It coordinates SPF and DKIM while adding an extra layer of verification called alignment.<\/p>\n<h3>How DMARC ties SPF and DKIM together<\/h3>\n<p>DMARC checks that the domain recipients see matches the domains used in authentication. This prevents sophisticated attacks where criminals pass SPF or DKIM but still impersonate your visible &#8220;from&#8221; address.<\/p>\n<p>DMARC offers 2 alignment modes:<\/p>\n<ol>\n<li><strong>Relaxed alignment:<\/strong> Allows subdomains to match the main domain<\/li>\n<li><strong>Strict alignment:<\/strong> Requires exact domain matches<\/li>\n<\/ol>\n<p>Most organizations start with relaxed alignment for flexibility, then tighten requirements as their email program matures.<\/p>\n<h3>Choosing the right DMARC policy<\/h3>\n<p>Begin with &#8220;none&#8221; to gather data without affecting delivery. Once you see consistent authentication success, move to &#8220;quarantine&#8221; and eventually &#8220;reject.&#8221;<\/p>\n<h3>DMARC reporting and monitoring<\/h3>\n<p>DMARC sends you reports showing:<\/p>\n<ul>\n<li>Who&#8217;s sending email using your domain<\/li>\n<li>Which messages pass or fail authentication<\/li>\n<li>Potential security threats or configuration issues<\/li>\n<\/ul>\n<p>These reports reveal problems before they impact deliverability. Regular monitoring helps you maintain strong authentication and quickly spot unauthorized senders.<\/p>\n"}]},{"main_heading":"How to authenticate email: 5 essential steps","content_block":[{"acf_fc_layout":"text","content":"<p>Ready to implement authentication? Follow these steps to protect your domain and improve deliverability.<\/p>\n<h3>Step 1: Audit your email sending sources<\/h3>\n<p>List every system that sends email for your domain. Include:<\/p>\n<ul>\n<li>Marketing platforms<\/li>\n<li>CRM systems<\/li>\n<li>Support platforms<\/li>\n<li>Internal servers<\/li>\n<li>Third-party integrations<\/li>\n<\/ul>\n<p>You&#8217;ll likely find more sources than expected. Document each one&#8217;s purpose and sending volume for your SPF record.<\/p>\n<h3>Step 2: Implement SPF records<\/h3>\n<p>Create your SPF record starting with primary senders. Use the &#8220;~all&#8221; qualifier initially \u2014 it marks unauthorized emails as suspicious without blocking them.<\/p>\n<p>Test your record with online validators. Watch for syntax errors and DNS lookup limits. Adjust as needed to include all legitimate senders.<\/p>\n<h3>Step 3: Configure DKIM signing<\/h3>\n<p>Enable DKIM in each email platform. Most generate keys automatically and provide DNS instructions.<\/p>\n<p>Verify DKIM works by sending test emails and checking headers. Look for the DKIM-Signature field and use online validators to confirm proper signing.<\/p>\n<h3>Step 4: Deploy your DMARC policy<\/h3>\n<p>Start with a monitoring-only DMARC policy: <code>v=DMARC1; p=none; rua=mailto:dmarc@yourdomain.com<\/code>. This collects data without affecting delivery. Review reports to understand your authentication baseline before adding enforcement.<\/p>\n<h3>Step 5: Monitor authentication performance<\/h3>\n<p>Set up regular report reviews. Look for:<\/p>\n<ul>\n<li>Authentication failure patterns<\/li>\n<li>New unauthorized senders<\/li>\n<li>Configuration issues<\/li>\n<\/ul>\n<p>Adjust your setup based on findings. Authentication isn&#8217;t set-and-forget \u2014 it requires ongoing attention as your email program evolves.<\/p>\n<a class=\"cta-button blue-button\" aria-label=\"Try monday campaigns\" href=\"https:\/\/auth.monday.com\/p\/marketing_campaigns\/users\/sign_up_new\" target=\"_blank\">Try monday campaigns<\/a>\n"}]},{"main_heading":"Email authentication testing and verification","content_block":[{"acf_fc_layout":"text","content":"<p>Testing prevents surprises. Verify your authentication works correctly before launching major <a href=\"https:\/\/monday.com\/blog\/crm-and-sales\/mass-email\/\" target=\"_blank\" rel=\"noopener\">mass email<\/a> campaigns.<\/p>\n<h3>Email authentication check platforms<\/h3>\n<p>Online testing platforms simulate how receiving servers process your emails. They check SPF syntax, DKIM signatures, and DMARC alignment in one comprehensive report.<\/p>\n<p>These platforms often provide specific recommendations for fixing issues. Some offer ongoing monitoring to alert you when authentication problems arise.<\/p>\n<h3>How to verify SPF configuration<\/h3>\n<p>SPF testing involves 2 key checks:<\/p>\n<ul>\n<li><strong>Syntax validation:<\/strong> Ensures your record follows proper formatting<\/li>\n<li><strong>Authorization testing:<\/strong> Confirms all your senders pass authentication<\/li>\n<\/ul>\n<p>Send test emails from each authorized source. Verify they pass SPF checks without errors or warnings.<\/p>\n<h3>Testing DKIM implementation<\/h3>\n<p>Check that DKIM signatures appear in your email headers. The signature should include your domain and selector information.<\/p>\n<p>Use DKIM validators to verify signatures. Test across different email providers to ensure broad compatibility.<\/p>\n<h3>Validating DMARC alignment<\/h3>\n<p>DMARC testing confirms both authentication and alignment work correctly. Send test emails and verify:<\/p>\n<ul>\n<li>SPF or DKIM passes<\/li>\n<li>Domain alignment succeeds<\/li>\n<li>Policy actions work as expected<\/li>\n<\/ul>\n<p>Test various scenarios to ensure comprehensive coverage. Your legitimate emails should pass while unauthorized attempts fail.<\/p>\n"}]},{"main_heading":"Common email authentication mistakes that hurt deliverability","content_block":[{"acf_fc_layout":"text","content":"<p>Even experienced teams make these authentication errors. Learn from others&#8217; mistakes to protect your deliverability.<\/p>\n<h3>1. Creating multiple SPF records<\/h3>\n<p>DNS allows only one SPF record per domain. Creating multiple records causes total authentication failure.<\/p>\n<p>This happens when different teams manage email independently. The marketing team adds their record, IT adds another, and suddenly nothing works. Consolidate all senders into one comprehensive record.<\/p>\n<h3>2. Using weak DKIM keys<\/h3>\n<p>Keys shorter than 2048 bits don&#8217;t provide adequate security. Attackers can crack weak keys and send authenticated spam using your domain.<\/p>\n<p>Always use 2048-bit keys minimum. If your platform defaults to shorter keys, manually configure stronger ones.<\/p>\n<h3>3. Setting DMARC too restrictive too soon<\/h3>\n<p>Jumping straight to &#8220;reject&#8221; policies can block legitimate emails. Important business communications might fail authentication due to minor configuration issues, so it&#8217;s best to start with monitoring, gradually increase enforcement, and use percentage rollouts for safety.<\/p>\n<h3>4. Neglecting subdomain authentication<\/h3>\n<p>Subdomains inherit parent domain DMARC policies. If you send from subdomains without proper authentication, those emails fail.<\/p>\n<p>Configure SPF and DKIM for each sending subdomain. Consider separate DMARC policies if subdomain authentication needs differ from your main domain.<\/p>\n"}]},{"main_heading":"Simplify email authentication with monday campaigns","content_block":[{"acf_fc_layout":"image","image_type":"normal","image":263246,"image_link":""},{"acf_fc_layout":"text","content":"<p>Managing authentication complexity distracts from what matters \u2014 creating campaigns that drive revenue. This complexity also disrupts <a href=\"https:\/\/monday.com\/blog\/marketing\/how-to-turbocharge-email-marketing-productivity-with-automation\/\" target=\"_blank\" rel=\"noopener\">email marketing productivity<\/a>. monday campaigns handles technical details automatically while you focus on results.<\/p>\n<h3>Automated domain setup and verification<\/h3>\n<p>Guiding you through the authentication setup step-by-step, monday campaigns generates necessary records and provides direct DNS instructions.<\/p>\n<p>Automatic verification confirms everything works correctly. No technical expertise required \u2014 just follow the prompts and start sending authenticated emails.<\/p>\n<h3>Real-time authentication monitoring<\/h3>\n<p>Built-in dashboards show authentication performance alongside campaign metrics. Spot issues immediately and understand how authentication impacts deliverability.<\/p>\n<p>Automated alerts notify you of problems before they affect campaigns. Stay ahead of authentication issues without constant manual monitoring.<\/p>\n<h3>CRM-integrated authentication management<\/h3>\n<p>Native <a href=\"https:\/\/monday.com\/blog\/crm-and-sales\/best-crm-with-email-marketing\/\" target=\"_blank\" rel=\"noopener\">CRM with email marketing<\/a> integration ensures consistent authentication across all customer touchpoints. Marketing emails that utilize <a href=\"https:\/\/monday.com\/blog\/crm-and-sales\/email-personalization\/\" target=\"_blank\" rel=\"noopener\">email personalization<\/a>, sales follow-ups, and support messages all benefit from proper authentication.<\/p>\n<p>This unified approach strengthens your entire email program. Every message reinforces trust and protects your sender reputation, helping you reduce your <a href=\"https:\/\/monday.com\/blog\/crm-and-sales\/email-bounce-rate\/\" target=\"_blank\" rel=\"noopener\">email bounce rate<\/a>.<\/p>\n"}]},{"main_heading":"Transform your email performance with proper authentication","content_block":[{"acf_fc_layout":"text","content":"<p>Email authentication isn&#8217;t optional anymore \u2014 it&#8217;s essential for reaching inboxes and protecting your brand. Platforms that automate the heavy lifting have eliminated the technical complexity that once made authentication challenging.<\/p>\n<p>Proper authentication delivers measurable business impact through improved deliverability, stronger engagement, and protected brand reputation. To further enhance your results, consider <a href=\"https:\/\/monday.com\/blog\/crm-and-sales\/email-segmentation\/\" target=\"_blank\" rel=\"noopener\">email segmentation<\/a> to ensure each message reaches the right inbox. These benefits compound over time as your sender reputation strengthens.<\/p>\n<p>Ready to implement authentication without the complexity? Let monday campaigns handle the technical details automatically, so you can focus on creating <a href=\"https:\/\/monday.com\/blog\/crm-and-sales\/email-sequences\/\" target=\"_blank\" rel=\"noopener\">email sequences<\/a> that convert.<\/p>\n<a class=\"cta-button blue-button\" aria-label=\"Try monday campaigns\" href=\"https:\/\/auth.monday.com\/p\/marketing_campaigns\/users\/sign_up_new\" target=\"_blank\">Try monday campaigns<\/a>\n"}]},{"main_heading":"","content_block":[{"acf_fc_layout":"text","content":"<div class=\"accordion faq\" id=\"faq-faqs\">\n  <h2 class=\"accordion__heading section-title text-left\">FAQs<\/h2>\n    <div class=\"accordion__item\">\n    <a class=\"accordion__button d-block\" data-toggle=\"collapse\" data-parent=\"#faq-faqs\" href=\"#q-faqs-1\"\n      aria-expanded=\"false\">\n      <h3 class=\"accordion__question\">How do I authenticate my email domain?        <svg class=\"angle-arrow angle-arrow--down\" width=\"32\" height=\"32\" viewBox=\"0 0 32 32\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n          <path fill-rule=\"evenodd\" clip-rule=\"evenodd\" d=\"M16.5303 20.8839C16.2374 21.1768 15.7626 21.1768 15.4697 20.8839L7.82318 13.2374C7.53029 12.9445 7.53029 12.4697 7.82318 12.1768L8.17674 11.8232C8.46963 11.5303 8.9445 11.5303 9.2374 11.8232L16 18.5858L22.7626 11.8232C23.0555 11.5303 23.5303 11.5303 23.8232 11.8232L24.1768 12.1768C24.4697 12.4697 24.4697 12.9445 24.1768 13.2374L16.5303 20.8839Z\" fill=\"black\"\/>\n        <\/svg>\n      <\/h3>\n    <\/a>\n    <div id=\"q-faqs-1\" class=\"accordion__answer collapse collapse--md\" data-parent=\"#faq-faqs\">\n      <p>To authenticate your email domain, you need to set up SPF, DKIM, and DMARC records in your DNS settings. Most email marketing platforms provide these records and instructions for adding them to your domain configuration.<\/p>\n    <\/div>\n  <\/div>\n    <div class=\"accordion__item\">\n    <a class=\"accordion__button d-block\" data-toggle=\"collapse\" data-parent=\"#faq-faqs\" href=\"#q-faqs-2\"\n      aria-expanded=\"false\">\n      <h3 class=\"accordion__question\">How long does email authentication take to work?        <svg class=\"angle-arrow angle-arrow--down\" width=\"32\" height=\"32\" viewBox=\"0 0 32 32\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n          <path fill-rule=\"evenodd\" clip-rule=\"evenodd\" d=\"M16.5303 20.8839C16.2374 21.1768 15.7626 21.1768 15.4697 20.8839L7.82318 13.2374C7.53029 12.9445 7.53029 12.4697 7.82318 12.1768L8.17674 11.8232C8.46963 11.5303 8.9445 11.5303 9.2374 11.8232L16 18.5858L22.7626 11.8232C23.0555 11.5303 23.5303 11.5303 23.8232 11.8232L24.1768 12.1768C24.4697 12.4697 24.4697 12.9445 24.1768 13.2374L16.5303 20.8839Z\" fill=\"black\"\/>\n        <\/svg>\n      <\/h3>\n    <\/a>\n    <div id=\"q-faqs-2\" class=\"accordion__answer collapse collapse--md\" data-parent=\"#faq-faqs\">\n      <p>To answer how long email authentication takes to work, it typically takes 24-48 hours to fully propagate through DNS systems. Some email providers may recognize changes within a few hours, but full global propagation requires patience.<\/p>\n    <\/div>\n  <\/div>\n    <div class=\"accordion__item\">\n    <a class=\"accordion__button d-block\" data-toggle=\"collapse\" data-parent=\"#faq-faqs\" href=\"#q-faqs-3\"\n      aria-expanded=\"false\">\n      <h3 class=\"accordion__question\">Can authenticated emails still be marked as spam?        <svg class=\"angle-arrow angle-arrow--down\" width=\"32\" height=\"32\" viewBox=\"0 0 32 32\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n          <path fill-rule=\"evenodd\" clip-rule=\"evenodd\" d=\"M16.5303 20.8839C16.2374 21.1768 15.7626 21.1768 15.4697 20.8839L7.82318 13.2374C7.53029 12.9445 7.53029 12.4697 7.82318 12.1768L8.17674 11.8232C8.46963 11.5303 8.9445 11.5303 9.2374 11.8232L16 18.5858L22.7626 11.8232C23.0555 11.5303 23.5303 11.5303 23.8232 11.8232L24.1768 12.1768C24.4697 12.4697 24.4697 12.9445 24.1768 13.2374L16.5303 20.8839Z\" fill=\"black\"\/>\n        <\/svg>\n      <\/h3>\n    <\/a>\n    <div id=\"q-faqs-3\" class=\"accordion__answer collapse collapse--md\" data-parent=\"#faq-faqs\">\n      <p>Yes, authenticated emails can still land in spam folders because authentication only verifies sender identity. Spam filters also evaluate content quality, sending patterns, and recipient engagement when making delivery decisions.<\/p>\n    <\/div>\n  <\/div>\n    <div class=\"accordion__item\">\n    <a class=\"accordion__button d-block\" data-toggle=\"collapse\" data-parent=\"#faq-faqs\" href=\"#q-faqs-4\"\n      aria-expanded=\"false\">\n      <h3 class=\"accordion__question\">What happens when my emails fail authentication checks?        <svg class=\"angle-arrow angle-arrow--down\" width=\"32\" height=\"32\" viewBox=\"0 0 32 32\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n          <path fill-rule=\"evenodd\" clip-rule=\"evenodd\" d=\"M16.5303 20.8839C16.2374 21.1768 15.7626 21.1768 15.4697 20.8839L7.82318 13.2374C7.53029 12.9445 7.53029 12.4697 7.82318 12.1768L8.17674 11.8232C8.46963 11.5303 8.9445 11.5303 9.2374 11.8232L16 18.5858L22.7626 11.8232C23.0555 11.5303 23.5303 11.5303 23.8232 11.8232L24.1768 12.1768C24.4697 12.4697 24.4697 12.9445 24.1768 13.2374L16.5303 20.8839Z\" fill=\"black\"\/>\n        <\/svg>\n      <\/h3>\n    <\/a>\n    <div id=\"q-faqs-4\" class=\"accordion__answer collapse collapse--md\" data-parent=\"#faq-faqs\">\n      <p>When emails fail authentication, receiving servers follow your DMARC policy \u2014 either monitoring only, sending to spam, or blocking delivery entirely. Without DMARC, servers make independent decisions that vary by provider.<\/p>\n    <\/div>\n  <\/div>\n    <div class=\"accordion__item\">\n    <a class=\"accordion__button d-block\" data-toggle=\"collapse\" data-parent=\"#faq-faqs\" href=\"#q-faqs-5\"\n      aria-expanded=\"false\">\n      <h3 class=\"accordion__question\">Do I need all 3 authentication protocols?        <svg class=\"angle-arrow angle-arrow--down\" width=\"32\" height=\"32\" viewBox=\"0 0 32 32\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n          <path fill-rule=\"evenodd\" clip-rule=\"evenodd\" d=\"M16.5303 20.8839C16.2374 21.1768 15.7626 21.1768 15.4697 20.8839L7.82318 13.2374C7.53029 12.9445 7.53029 12.4697 7.82318 12.1768L8.17674 11.8232C8.46963 11.5303 8.9445 11.5303 9.2374 11.8232L16 18.5858L22.7626 11.8232C23.0555 11.5303 23.5303 11.5303 23.8232 11.8232L24.1768 12.1768C24.4697 12.4697 24.4697 12.9445 24.1768 13.2374L16.5303 20.8839Z\" fill=\"black\"\/>\n        <\/svg>\n      <\/h3>\n    <\/a>\n    <div id=\"q-faqs-5\" class=\"accordion__answer collapse collapse--md\" data-parent=\"#faq-faqs\">\n      <p>You need at least SPF or DKIM for basic authentication, but DMARC requires one of them to function. Implementing all 3 provides the strongest protection and highest deliverability rates.<\/p>\n    <\/div>\n  <\/div>\n    <div class=\"accordion__item\">\n    <a class=\"accordion__button d-block\" data-toggle=\"collapse\" data-parent=\"#faq-faqs\" href=\"#q-faqs-6\"\n      aria-expanded=\"false\">\n      <h3 class=\"accordion__question\">How do I check if my email authentication is working?        <svg class=\"angle-arrow angle-arrow--down\" width=\"32\" height=\"32\" viewBox=\"0 0 32 32\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n          <path fill-rule=\"evenodd\" clip-rule=\"evenodd\" d=\"M16.5303 20.8839C16.2374 21.1768 15.7626 21.1768 15.4697 20.8839L7.82318 13.2374C7.53029 12.9445 7.53029 12.4697 7.82318 12.1768L8.17674 11.8232C8.46963 11.5303 8.9445 11.5303 9.2374 11.8232L16 18.5858L22.7626 11.8232C23.0555 11.5303 23.5303 11.5303 23.8232 11.8232L24.1768 12.1768C24.4697 12.4697 24.4697 12.9445 24.1768 13.2374L16.5303 20.8839Z\" fill=\"black\"\/>\n        <\/svg>\n      <\/h3>\n    <\/a>\n    <div id=\"q-faqs-6\" class=\"accordion__answer collapse collapse--md\" data-parent=\"#faq-faqs\">\n      <p>Check email authentication using online testing platforms, DNS lookup services, or DMARC reports. Send test emails to various providers and review the authentication results in message headers.<\/p>\n    <\/div>\n  <\/div>\n  <script type='application\/ld+json'>{\n    \"@context\": \"https:\\\/\\\/schema.org\",\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How do I authenticate my email domain?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"<p>To authenticate your email domain, you need to set up SPF, DKIM, and DMARC records in your DNS settings. 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Most email marketing platforms provide these records and instructions for adding them to your domain configuration.<\/p>\n"},{"question":"How long does email authentication take to work?","answer":"<p>To answer how long email authentication takes to work, it typically takes 24-48 hours to fully propagate through DNS systems. Some email providers may recognize changes within a few hours, but full global propagation requires patience.<\/p>\n"},{"question":"Can authenticated emails still be marked as spam?","answer":"<p>Yes, authenticated emails can still land in spam folders because authentication only verifies sender identity. Spam filters also evaluate content quality, sending patterns, and recipient engagement when making delivery decisions.<\/p>\n"},{"question":"What happens when my emails fail authentication checks?","answer":"<p>When emails fail authentication, receiving servers follow your DMARC policy \u2014 either monitoring only, sending to spam, or blocking delivery entirely. 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Learn how it works.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/monday.com\/blog\/monday-campaigns\/email-authentication\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Email authentication fundamentals: SPF, DKIM, and DMARC\" \/>\n<meta property=\"og:description\" content=\"Email authentication protects your domain by verifying sender identity and preventing spoofing, phishing, and delivery issues. 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