{"id":15618,"date":"2026-10-12T10:11:56","date_gmt":"2026-10-12T04:41:56","guid":{"rendered":"https:\/\/threatcop.com\/blog\/?p=15618"},"modified":"2026-10-12T10:11:58","modified_gmt":"2026-10-12T04:41:58","slug":"threat-intelligence-feeds-email-security","status":"publish","type":"post","link":"https:\/\/threatcop.com\/blog\/threat-intelligence-feeds-email-security\/","title":{"rendered":"Threat Intelligence Feeds in Email Security: What They Do"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">A threat intelligence feed is a live stream of indicators tied to active attacks. It covers bad domains, sender addresses, file hashes, and infrastructure patterns. Adding one to email security means your filters check mail against what attackers are doing right now, not just what was known when someone wrote the rules. The value is speed. The limit is that feeds only describe what someone has already seen.<\/p><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_88 ez-toc-wrap-center counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #414141;color:#414141\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #414141;color:#414141\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/threatcop.com\/blog\/threat-intelligence-feeds-email-security\/#The_Gap_Feeds_Are_Meant_to_Close\" >The Gap Feeds Are Meant to Close<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/threatcop.com\/blog\/threat-intelligence-feeds-email-security\/#What_a_Feed_Actually_Delivers\" >What a Feed Actually Delivers<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/threatcop.com\/blog\/threat-intelligence-feeds-email-security\/#Book_a_Free_Demo_Call_with_Our_Expert\" >Book a Free Demo Call with Our Expert<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/threatcop.com\/blog\/threat-intelligence-feeds-email-security\/#Where_Threat_Intelligence_Genuinely_Helps\" >Where Threat Intelligence Genuinely Helps<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/threatcop.com\/blog\/threat-intelligence-feeds-email-security\/#The_Honest_Limits\" >The Honest Limits<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/threatcop.com\/blog\/threat-intelligence-feeds-email-security\/#How_to_Integrate_Without_Adding_Noise\" >How to Integrate Without Adding Noise<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/threatcop.com\/blog\/threat-intelligence-feeds-email-security\/#The_Layer_Feeds_Cannot_Reach\" >The Layer Feeds Cannot Reach<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/threatcop.com\/blog\/threat-intelligence-feeds-email-security\/#The_Bottom_Line\" >The Bottom Line<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/threatcop.com\/blog\/threat-intelligence-feeds-email-security\/#Frequently_Asked_Questions\" >Frequently Asked Questions<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"The_Gap_Feeds_Are_Meant_to_Close\"><\/span>The Gap Feeds Are Meant to Close<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Traditional email filtering compares a message against known-bad patterns, the approach <a href=\"https:\/\/www.cisa.gov\/topics\/cyber-threats-and-advisories\" rel=\"nofollow noopener\" target=\"_blank\">CISA documents<\/a> across its own advisories. That works for attacks that have been around long enough for someone to catalogue them.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Modern campaigns do not wait. Attackers can register a phishing domain, use it, and drop it inside a single day. By the time it reaches a static blocklist, the campaign has moved on, which is one reason <a href=\"https:\/\/threatcop.com\/blog\/phishing-emails-fool-email-filters\/\">email filters miss real phishing<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Threat intelligence narrows that window. When someone flags a domain anywhere in the world, a feed can push that indicator to your filters within minutes, rather than at the next scheduled update.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_a_Feed_Actually_Delivers\"><\/span>What a Feed Actually Delivers<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Still, not all intelligence is the same, and the differences matter when you pick one.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>Type<\/strong><\/th><th><strong>What it contains<\/strong><\/th><th><strong>Best used for<\/strong><\/th><\/tr><\/thead><tbody><tr><td>Indicators of compromise<\/td><td>Domains, IPs, file hashes, sender addresses<\/td><td>Immediate blocking<\/td><\/tr><tr><td>Tactics and techniques<\/td><td>How attackers operate, mapped to frameworks<\/td><td>Detection rule design<\/td><\/tr><tr><td>Sector-specific<\/td><td>Campaigns targeting your industry<\/td><td>Prioritizing what matters<\/td><\/tr><tr><td>Brand and domain<\/td><td>Lookalike domains registered against you<\/td><td>Spotting impersonation early<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The first row gets the most attention, and it ages fastest. A bad IP may not matter within hours. The second row ages slowly, because attacker behavior shifts less often than infrastructure.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">That difference should shape what you pay for. Buying more indicators solves a volume problem. Tracking how techniques change solves a design problem.<\/p>\n\n\n\n<meta charset=\"UTF-8\">\n<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n<title>Threatcop \u2013 Book a Free Demo<\/title>\n<link href=\"https:\/\/fonts.googleapis.com\/css2?family=Outfit:wght@300;400;500;600;700&#038;display=swap\" rel=\"stylesheet\">\n<style>\n  .tc-wrap , .tc-wrap ::before, .tc-wrap ::after { box-sizing: border-box; margin: 0; padding: 0; }\n  .tc-wrap { font-family: 'Outfit', sans-serif; width: 100%; display: flex; justify-content: center; padding: 20px 10px; }\n  .tc-card { width: 100%; max-width: 820px; background: #fff; border-radius: 20px; overflow: hidden; box-shadow: 0 20px 60px rgba(24,57,148,0.13), 0 4px 16px rgba(24,57,148,0.07); display: flex; flex-direction: row; }\n  .tc-left { background: linear-gradient(160deg, #1e44b0 0%, #183994 40%, #0e2570 100%); width: 320px; flex-shrink: 0; padding: 40px 32px; display: flex; flex-direction: column; justify-content: center; 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never shared with third parties\n        <\/div>\n      <\/form>\n    <\/div>\n  <\/div>\n<\/div>\n<script>document.getElementById('tc-page-source').value = window.location.href;<\/script>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Where_Threat_Intelligence_Genuinely_Helps\"><\/span>Where Threat Intelligence Genuinely Helps<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">In practice, three uses justify the work on their own.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Newly registered domains are the clearest case. Attackers often register a lookalike domain days before using it. Feeds that track registrations can then flag mail from a domain that looks suspiciously new.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Campaign correlation comes second. When the same infrastructure shows up across many companies, a feed spots the pattern long before any single firm does.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Fake versions of your own brand come third, and teams often miss this one. Feeds that watch domain registrations can surface a lookalike of your domain aimed at your customers.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"The_Honest_Limits\"><\/span>The Honest Limits<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Threat intelligence does not predict. It shares what someone already saw.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">That creates three real limits. First, a feed cannot flag infrastructure nobody has seen yet, so a truly new campaign passes. Second, indicators go stale fast, and a feed that holds them too long creates <a href=\"https:\/\/threatcop.com\/blog\/false-positives-email-security\/\">false positives<\/a> on infrastructure that changed hands. Third, more feeds do not mean better coverage, since overlapping sources repeat the same indicators while adding triage work.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">There is a deeper limit too. A targeted message from a truly hacked supplier account carries no bad indicator at all. The domain is real, the sender is real, and so is the infrastructure. No feed flags it, because nothing about it was ever malicious before.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Integrate_Without_Adding_Noise\"><\/span>How to Integrate Without Adding Noise<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Start with sources that fit your sector.<\/strong> Intelligence about campaigns aimed at your industry beats a bigger generic feed.<\/li>\n\n\n\n<li><strong>Set expiry on indicators.<\/strong> An IP flagged six months ago should not still be blocking mail today.<\/li>\n\n\n\n<li><strong>Remove duplicates across sources.<\/strong> Overlapping feeds inflate your confidence in what is really one sighting.<\/li>\n\n\n\n<li><strong>Score it, do not just block it.<\/strong> Treat an indicator as one input among several, not an automatic verdict. Pair this with <a href=\"https:\/\/threatcop.com\/real-time-dmarc\">DMARC enforcement<\/a>, which stops spoofing of your own domain regardless of what any feed says.<\/li>\n\n\n\n<li><strong>Measure what each feed catches.<\/strong> A source that never produces a unique catch costs money and attention for nothing.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"The_Layer_Feeds_Cannot_Reach\"><\/span>The Layer Feeds Cannot Reach<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">So every point above improves what technology catches. None of it helps with a message that carries no indicator at all, and that gap is wider than most teams assume.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">That leftover category is where people decide the outcome. A convincing request from a real account, arriving at a believable moment, passes every automated check you have. The only control left is someone noticing the request does not fit, then saying so quickly.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/threatcop.com\/threatcop-phishing-incident-response\">Threatcop Phishing Incident Response (TPIR)<\/a> is built for that moment. One-click reporting from the mail client turns a suspicion into a signal in seconds. Behind the report, it runs header analysis, link and file scanning, an IP reputation check, and fake domain checks in a sandbox. So the security team gets an assessment, not a forwarded email. Its &#8220;Who Else&#8221; insight then shows which other mailboxes got the same message, turning one person&#8217;s judgment into the scope of the whole campaign.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">That is the part feeds structurally cannot provide. A feed tells you what others have seen. Your own staff tell you what is happening to you right now.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"The_Bottom_Line\"><\/span>The Bottom Line<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Threat intelligence feeds close a real gap: the delay between an attack appearing somewhere and your filters knowing it. So add them with expiry rules, duplicate removal, and a bias toward sector fit over raw volume. Then accept what they cannot do. The costliest email attacks arrive with no indicator at all, from accounts that are genuinely real. That means the last line of detection is still a person who reports what does not feel right.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions\"><\/span>Frequently Asked Questions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\t\t<div class=\"sp-easy-accordion-block sp-eab-regular-accordion alignwide\"\n\t\t\t\t>\n\t\t\t<div class=\"sp-eab-wrapper sp-eab-vertical-accordion sp-eab-af2458dc75b1\">\n\t\t\t\t\t\t\t\t<div class='sp-eab-accordion sp-eab-mode-vertical sp-eab-vertical-one sp-d-flex' data-accordion-settings=\"{&quot;mode&quot;:&quot;vertical&quot;,&quot;activeEvent&quot;:&quot;click&quot;,&quot;defaultAccordionOpen&quot;:&quot;first-item&quot;,&quot;selectedItemOpen&quot;:0,&quot;openMultiItemAtaTime&quot;:false,&quot;scrollToTopOnLoad&quot;:false,&quot;scrollToTopOnClick&quot;:false,&quot;accordionItemToUrl&quot;:false,&quot;animationEffect&quot;:false,&quot;applyAccessibility&quot;:true}\">\n        \t    \t\n\t\t\t<div\n\t\t\t\tid =\"sp-eab-item-ec93add4811b\"\n\t\t\t\tclass=\"sp-eab-accordion-item eab-item-dc75b1\"\n\t\t\t\t\t\t\t>\n\t\t\t\t<div class=\"sp-eab-accordion-item-wrapper\">\n\t\t\t\t\t\t\t\t<h3 class='sp-eab-accordion-heading sp-d-flex sp-align-center eab-heading-dc75b1'\n\t\t\t\t\t\t>\n\t\t\t\t<span class='sp-eab-accordion-header-wrapper sp-d-flex sp-align-center eab-icon-position-end'>\n\t\t\t\t\t<span class='sp-eab-accordion-header-start sp-d-flex sp-justify-left sp-align-center'>\n\t\t\t\t\t\t<span class='sp-eab-title-subtitle-wrapper sp-d-flex'>\n\t\t\t\t\t\t\t<span class='sp-eab-accordion-title-wrapper sp-d-flex sp-align-center'>\n\t\t\t\t\t\t\t\t<span class='sp-eab-accordion-title-text'>\n\t\t\t\t\t\t\t\t\tWhat is a threat intelligence feed?\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<span class='sp-eab-accordion-header-end eab-icon-animated'>\n\t\t\t\t\t\t\t\t\t\t\t\t<span class='sp-eab-expand-collapse-icon sp-d-block'>\n\t\t\t\t\t\t\t<i class='sp-eab-expand-icon eab-icon-angle-down-solid'><\/i>\n\t\t\t\t\t\t\t<i class='sp-eab-collapse-icon eab-icon-angle-up-solid'><\/i>\n\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t<\/span>\n\t\t\t<\/h3>\n\t\t\t\t\t\t\t<!-- accordion body -->\n\t\t\t\t\t<div class='sp-eab-accordion-content eab-content-dc75b1'>\n\t\t\t\t\t\t\t\t\t\t\t\t<div class='sp-eab-accordion-content-wrapper'>\n\t\t\t\t\t\t\t<div class='sp-eab-accordion-body'>\n\t\t\t    \t\t\t\t\n\n<p class=\"wp-block-paragraph\">A threat intelligence feed is a live stream of data about active threats. It includes bad domains, IP addresses, file hashes, and sender addresses. Security tools check mail against these indicators to block known-bad activity faster than a static list allows.<\/p>\n\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\n\n\t\t\t<div\n\t\t\t\tid =\"sp-eab-item-f65bc7814cbe\"\n\t\t\t\tclass=\"sp-eab-accordion-item eab-item-dc75b1\"\n\t\t\t\t\t\t\t>\n\t\t\t\t<div class=\"sp-eab-accordion-item-wrapper\">\n\t\t\t\t\t\t\t\t<h3 class='sp-eab-accordion-heading sp-d-flex sp-align-center eab-heading-dc75b1'\n\t\t\t\t\t\t>\n\t\t\t\t<span class='sp-eab-accordion-header-wrapper sp-d-flex sp-align-center eab-icon-position-end'>\n\t\t\t\t\t<span class='sp-eab-accordion-header-start sp-d-flex sp-justify-left sp-align-center'>\n\t\t\t\t\t\t<span class='sp-eab-title-subtitle-wrapper sp-d-flex'>\n\t\t\t\t\t\t\t<span class='sp-eab-accordion-title-wrapper sp-d-flex sp-align-center'>\n\t\t\t\t\t\t\t\t<span class='sp-eab-accordion-title-text'>\n\t\t\t\t\t\t\t\t\tHow does threat intelligence improve email security?\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<span class='sp-eab-accordion-header-end eab-icon-animated'>\n\t\t\t\t\t\t\t\t\t\t\t\t<span class='sp-eab-expand-collapse-icon sp-d-block'>\n\t\t\t\t\t\t\t<i class='sp-eab-expand-icon eab-icon-angle-down-solid'><\/i>\n\t\t\t\t\t\t\t<i class='sp-eab-collapse-icon eab-icon-angle-up-solid'><\/i>\n\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t<\/span>\n\t\t\t<\/h3>\n\t\t\t\t\t\t\t<!-- accordion body -->\n\t\t\t\t\t<div class='sp-eab-accordion-content eab-content-dc75b1'>\n\t\t\t\t\t\t\t\t\t\t\t\t<div class='sp-eab-accordion-content-wrapper'>\n\t\t\t\t\t\t\t<div class='sp-eab-accordion-body'>\n\t\t\t    \t\t\t\t\n\n<p class=\"wp-block-paragraph\">Threat intelligence shortens the gap between an attack showing up somewhere and your filters knowing about it. A domain flagged at one company can be blocked at yours within minutes, rather than waiting for the next signature update.<\/p>\n\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\n\n\t\t\t<div\n\t\t\t\tid =\"sp-eab-item-569ec7fe61c9\"\n\t\t\t\tclass=\"sp-eab-accordion-item eab-item-dc75b1\"\n\t\t\t\t\t\t\t>\n\t\t\t\t<div class=\"sp-eab-accordion-item-wrapper\">\n\t\t\t\t\t\t\t\t<h3 class='sp-eab-accordion-heading sp-d-flex sp-align-center eab-heading-dc75b1'\n\t\t\t\t\t\t>\n\t\t\t\t<span class='sp-eab-accordion-header-wrapper sp-d-flex sp-align-center eab-icon-position-end'>\n\t\t\t\t\t<span class='sp-eab-accordion-header-start sp-d-flex sp-justify-left sp-align-center'>\n\t\t\t\t\t\t<span class='sp-eab-title-subtitle-wrapper sp-d-flex'>\n\t\t\t\t\t\t\t<span class='sp-eab-accordion-title-wrapper sp-d-flex sp-align-center'>\n\t\t\t\t\t\t\t\t<span class='sp-eab-accordion-title-text'>\n\t\t\t\t\t\t\t\t\tDo more threat intelligence feeds mean better protection?\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<span class='sp-eab-accordion-header-end eab-icon-animated'>\n\t\t\t\t\t\t\t\t\t\t\t\t<span class='sp-eab-expand-collapse-icon sp-d-block'>\n\t\t\t\t\t\t\t<i class='sp-eab-expand-icon eab-icon-angle-down-solid'><\/i>\n\t\t\t\t\t\t\t<i class='sp-eab-collapse-icon eab-icon-angle-up-solid'><\/i>\n\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t<\/span>\n\t\t\t<\/h3>\n\t\t\t\t\t\t\t<!-- accordion body -->\n\t\t\t\t\t<div class='sp-eab-accordion-content eab-content-dc75b1'>\n\t\t\t\t\t\t\t\t\t\t\t\t<div class='sp-eab-accordion-content-wrapper'>\n\t\t\t\t\t\t\t<div class='sp-eab-accordion-body'>\n\t\t\t    \t\t\t\t\n\n<p class=\"wp-block-paragraph\">Not usually. Overlapping feeds repeat the same indicators while multiplying triage work. A few well-kept sources that fit your sector usually beat a larger pile of generic ones. Sector <a href=\"https:\/\/www.cisa.gov\/topics\/cyber-threats-and-advisories\" rel=\"nofollow noopener\" target=\"_blank\">information sharing groups<\/a> are often the better starting point.<\/p>\n\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\n\n\t\t\t<div\n\t\t\t\tid =\"sp-eab-item-3b3c695c9b82\"\n\t\t\t\tclass=\"sp-eab-accordion-item eab-item-dc75b1\"\n\t\t\t\t\t\t\t>\n\t\t\t\t<div class=\"sp-eab-accordion-item-wrapper\">\n\t\t\t\t\t\t\t\t<h3 class='sp-eab-accordion-heading sp-d-flex sp-align-center eab-heading-dc75b1'\n\t\t\t\t\t\t>\n\t\t\t\t<span class='sp-eab-accordion-header-wrapper sp-d-flex sp-align-center eab-icon-position-end'>\n\t\t\t\t\t<span class='sp-eab-accordion-header-start sp-d-flex sp-justify-left sp-align-center'>\n\t\t\t\t\t\t<span class='sp-eab-title-subtitle-wrapper sp-d-flex'>\n\t\t\t\t\t\t\t<span class='sp-eab-accordion-title-wrapper sp-d-flex sp-align-center'>\n\t\t\t\t\t\t\t\t<span class='sp-eab-accordion-title-text'>\n\t\t\t\t\t\t\t\t\tCan threat intelligence stop business email compromise?\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<span class='sp-eab-accordion-header-end eab-icon-animated'>\n\t\t\t\t\t\t\t\t\t\t\t\t<span class='sp-eab-expand-collapse-icon sp-d-block'>\n\t\t\t\t\t\t\t<i class='sp-eab-expand-icon eab-icon-angle-down-solid'><\/i>\n\t\t\t\t\t\t\t<i class='sp-eab-collapse-icon eab-icon-angle-up-solid'><\/i>\n\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t<\/span>\n\t\t\t<\/h3>\n\t\t\t\t\t\t\t<!-- accordion body -->\n\t\t\t\t\t<div class='sp-eab-accordion-content eab-content-dc75b1'>\n\t\t\t\t\t\t\t\t\t\t\t\t<div class='sp-eab-accordion-content-wrapper'>\n\t\t\t\t\t\t\t<div class='sp-eab-accordion-body'>\n\t\t\t    \t\t\t\t\n\n<p class=\"wp-block-paragraph\">Rarely on its own. A message from a truly hacked supplier account carries no bad indicator, because the domain, sender, and infrastructure are all real. These attacks need behavior-based detection and human reporting, not indicator matching.<\/p>\n\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\n\n\t\t\t<div\n\t\t\t\tid =\"sp-eab-item-9c5b8081741b\"\n\t\t\t\tclass=\"sp-eab-accordion-item eab-item-dc75b1\"\n\t\t\t\t\t\t\t>\n\t\t\t\t<div class=\"sp-eab-accordion-item-wrapper\">\n\t\t\t\t\t\t\t\t<h3 class='sp-eab-accordion-heading sp-d-flex sp-align-center eab-heading-dc75b1'\n\t\t\t\t\t\t>\n\t\t\t\t<span class='sp-eab-accordion-header-wrapper sp-d-flex sp-align-center eab-icon-position-end'>\n\t\t\t\t\t<span class='sp-eab-accordion-header-start sp-d-flex sp-justify-left sp-align-center'>\n\t\t\t\t\t\t<span class='sp-eab-title-subtitle-wrapper sp-d-flex'>\n\t\t\t\t\t\t\t<span class='sp-eab-accordion-title-wrapper sp-d-flex sp-align-center'>\n\t\t\t\t\t\t\t\t<span class='sp-eab-accordion-title-text'>\n\t\t\t\t\t\t\t\t\tHow long should threat indicators stay active?\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<span class='sp-eab-accordion-header-end eab-icon-animated'>\n\t\t\t\t\t\t\t\t\t\t\t\t<span class='sp-eab-expand-collapse-icon sp-d-block'>\n\t\t\t\t\t\t\t<i class='sp-eab-expand-icon eab-icon-angle-down-solid'><\/i>\n\t\t\t\t\t\t\t<i class='sp-eab-collapse-icon eab-icon-angle-up-solid'><\/i>\n\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t<\/span>\n\t\t\t<\/h3>\n\t\t\t\t\t\t\t<!-- accordion body -->\n\t\t\t\t\t<div class='sp-eab-accordion-content eab-content-dc75b1'>\n\t\t\t\t\t\t\t\t\t\t\t\t<div class='sp-eab-accordion-content-wrapper'>\n\t\t\t\t\t\t\t<div class='sp-eab-accordion-body'>\n\t\t\t    \t\t\t\t\n\n<p class=\"wp-block-paragraph\">Indicator lifespan depends on the type. IP addresses and URLs change hands quickly, so they should expire in days. Intelligence about how attackers operate stays useful far longer, because behavior shifts more slowly than infrastructure. Framework-based catalogues such as <a href=\"https:\/\/attack.mitre.org\/\" rel=\"nofollow noopener\" target=\"_blank\">MITRE ATT&amp;CK<\/a> age especially well for this reason.<\/p>\n\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Threat intelligence feeds close the gap between an attack appearing and your filters knowing. See what they catch, what they miss, and how to integrate them.<\/p>\n","protected":false},"author":22,"featured_media":15624,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[45],"tags":[],"class_list":["post-15618","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-email-security"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Threat Intelligence Feeds in Email Security: What They Do<\/title>\n<meta name=\"description\" content=\"Threat intelligence feeds close the gap between an attack appearing and your filters knowing. 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