CINXE.COM
March 2017 – dmarc.org
<!DOCTYPE html> <html lang="en-US"> <head> <meta charset="UTF-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale = 1.0, user-scalable=0" /> <link rel="profile" href="http://gmpg.org/xfn/11" /> <link rel="pingback" href="https://dmarc.org/xmlrpc.php" /> <title>March 2017 – dmarc.org</title> <meta name='robots' content='max-image-preview:large' /> <link rel='dns-prefetch' href='//www.googletagmanager.com' /> <link rel='dns-prefetch' href='//fonts.googleapis.com' /> <link rel="alternate" type="application/rss+xml" title="dmarc.org » Feed" href="https://dmarc.org/feed/" /> <link rel="alternate" type="application/rss+xml" title="dmarc.org » Comments Feed" href="https://dmarc.org/comments/feed/" /> <script type="text/javascript"> /* <![CDATA[ */ window._wpemojiSettings = {"baseUrl":"https:\/\/s.w.org\/images\/core\/emoji\/15.0.3\/72x72\/","ext":".png","svgUrl":"https:\/\/s.w.org\/images\/core\/emoji\/15.0.3\/svg\/","svgExt":".svg","source":{"concatemoji":"https:\/\/dmarc.org\/wp-includes\/js\/wp-emoji-release.min.js?ver=690c00815d284bc3881eccce686c00c8"}}; /*! This file is auto-generated */ !function(i,n){var o,s,e;function c(e){try{var t={supportTests:e,timestamp:(new Date).valueOf()};sessionStorage.setItem(o,JSON.stringify(t))}catch(e){}}function p(e,t,n){e.clearRect(0,0,e.canvas.width,e.canvas.height),e.fillText(t,0,0);var t=new Uint32Array(e.getImageData(0,0,e.canvas.width,e.canvas.height).data),r=(e.clearRect(0,0,e.canvas.width,e.canvas.height),e.fillText(n,0,0),new Uint32Array(e.getImageData(0,0,e.canvas.width,e.canvas.height).data));return t.every(function(e,t){return e===r[t]})}function u(e,t,n){switch(t){case"flag":return n(e,"\ud83c\udff3\ufe0f\u200d\u26a7\ufe0f","\ud83c\udff3\ufe0f\u200b\u26a7\ufe0f")?!1:!n(e,"\ud83c\uddfa\ud83c\uddf3","\ud83c\uddfa\u200b\ud83c\uddf3")&&!n(e,"\ud83c\udff4\udb40\udc67\udb40\udc62\udb40\udc65\udb40\udc6e\udb40\udc67\udb40\udc7f","\ud83c\udff4\u200b\udb40\udc67\u200b\udb40\udc62\u200b\udb40\udc65\u200b\udb40\udc6e\u200b\udb40\udc67\u200b\udb40\udc7f");case"emoji":return!n(e,"\ud83d\udc26\u200d\u2b1b","\ud83d\udc26\u200b\u2b1b")}return!1}function f(e,t,n){var r="undefined"!=typeof WorkerGlobalScope&&self instanceof WorkerGlobalScope?new OffscreenCanvas(300,150):i.createElement("canvas"),a=r.getContext("2d",{willReadFrequently:!0}),o=(a.textBaseline="top",a.font="600 32px Arial",{});return e.forEach(function(e){o[e]=t(a,e,n)}),o}function t(e){var t=i.createElement("script");t.src=e,t.defer=!0,i.head.appendChild(t)}"undefined"!=typeof Promise&&(o="wpEmojiSettingsSupports",s=["flag","emoji"],n.supports={everything:!0,everythingExceptFlag:!0},e=new Promise(function(e){i.addEventListener("DOMContentLoaded",e,{once:!0})}),new Promise(function(t){var n=function(){try{var e=JSON.parse(sessionStorage.getItem(o));if("object"==typeof e&&"number"==typeof e.timestamp&&(new Date).valueOf()<e.timestamp+604800&&"object"==typeof e.supportTests)return e.supportTests}catch(e){}return null}();if(!n){if("undefined"!=typeof Worker&&"undefined"!=typeof OffscreenCanvas&&"undefined"!=typeof URL&&URL.createObjectURL&&"undefined"!=typeof Blob)try{var e="postMessage("+f.toString()+"("+[JSON.stringify(s),u.toString(),p.toString()].join(",")+"));",r=new Blob([e],{type:"text/javascript"}),a=new Worker(URL.createObjectURL(r),{name:"wpTestEmojiSupports"});return void(a.onmessage=function(e){c(n=e.data),a.terminate(),t(n)})}catch(e){}c(n=f(s,u,p))}t(n)}).then(function(e){for(var t in e)n.supports[t]=e[t],n.supports.everything=n.supports.everything&&n.supports[t],"flag"!==t&&(n.supports.everythingExceptFlag=n.supports.everythingExceptFlag&&n.supports[t]);n.supports.everythingExceptFlag=n.supports.everythingExceptFlag&&!n.supports.flag,n.DOMReady=!1,n.readyCallback=function(){n.DOMReady=!0}}).then(function(){return e}).then(function(){var e;n.supports.everything||(n.readyCallback(),(e=n.source||{}).concatemoji?t(e.concatemoji):e.wpemoji&&e.twemoji&&(t(e.twemoji),t(e.wpemoji)))}))}((window,document),window._wpemojiSettings); /* ]]> */ </script> <style id='wp-emoji-styles-inline-css' type='text/css'> img.wp-smiley, img.emoji { display: inline !important; border: none !important; box-shadow: none !important; height: 1em !important; width: 1em !important; margin: 0 0.07em !important; vertical-align: -0.1em !important; background: none !important; padding: 0 !important; } </style> <link rel='stylesheet' id='wp-block-library-css' href='https://dmarc.org/wp-includes/css/dist/block-library/style.min.css?ver=690c00815d284bc3881eccce686c00c8' type='text/css' media='all' /> <style id='classic-theme-styles-inline-css' type='text/css'> /*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} </style> <style id='global-styles-inline-css' type='text/css'> body{--wp--preset--color--black: #000000;--wp--preset--color--cyan-bluish-gray: #abb8c3;--wp--preset--color--white: #ffffff;--wp--preset--color--pale-pink: #f78da7;--wp--preset--color--vivid-red: #cf2e2e;--wp--preset--color--luminous-vivid-orange: #ff6900;--wp--preset--color--luminous-vivid-amber: #fcb900;--wp--preset--color--light-green-cyan: #7bdcb5;--wp--preset--color--vivid-green-cyan: #00d084;--wp--preset--color--pale-cyan-blue: #8ed1fc;--wp--preset--color--vivid-cyan-blue: #0693e3;--wp--preset--color--vivid-purple: #9b51e0;--wp--preset--gradient--vivid-cyan-blue-to-vivid-purple: linear-gradient(135deg,rgba(6,147,227,1) 0%,rgb(155,81,224) 100%);--wp--preset--gradient--light-green-cyan-to-vivid-green-cyan: linear-gradient(135deg,rgb(122,220,180) 0%,rgb(0,208,130) 100%);--wp--preset--gradient--luminous-vivid-amber-to-luminous-vivid-orange: linear-gradient(135deg,rgba(252,185,0,1) 0%,rgba(255,105,0,1) 100%);--wp--preset--gradient--luminous-vivid-orange-to-vivid-red: linear-gradient(135deg,rgba(255,105,0,1) 0%,rgb(207,46,46) 100%);--wp--preset--gradient--very-light-gray-to-cyan-bluish-gray: linear-gradient(135deg,rgb(238,238,238) 0%,rgb(169,184,195) 100%);--wp--preset--gradient--cool-to-warm-spectrum: linear-gradient(135deg,rgb(74,234,220) 0%,rgb(151,120,209) 20%,rgb(207,42,186) 40%,rgb(238,44,130) 60%,rgb(251,105,98) 80%,rgb(254,248,76) 100%);--wp--preset--gradient--blush-light-purple: linear-gradient(135deg,rgb(255,206,236) 0%,rgb(152,150,240) 100%);--wp--preset--gradient--blush-bordeaux: linear-gradient(135deg,rgb(254,205,165) 0%,rgb(254,45,45) 50%,rgb(107,0,62) 100%);--wp--preset--gradient--luminous-dusk: linear-gradient(135deg,rgb(255,203,112) 0%,rgb(199,81,192) 50%,rgb(65,88,208) 100%);--wp--preset--gradient--pale-ocean: linear-gradient(135deg,rgb(255,245,203) 0%,rgb(182,227,212) 50%,rgb(51,167,181) 100%);--wp--preset--gradient--electric-grass: linear-gradient(135deg,rgb(202,248,128) 0%,rgb(113,206,126) 100%);--wp--preset--gradient--midnight: linear-gradient(135deg,rgb(2,3,129) 0%,rgb(40,116,252) 100%);--wp--preset--font-size--small: 13px;--wp--preset--font-size--medium: 20px;--wp--preset--font-size--large: 36px;--wp--preset--font-size--x-large: 42px;--wp--preset--spacing--20: 0.44rem;--wp--preset--spacing--30: 0.67rem;--wp--preset--spacing--40: 1rem;--wp--preset--spacing--50: 1.5rem;--wp--preset--spacing--60: 2.25rem;--wp--preset--spacing--70: 3.38rem;--wp--preset--spacing--80: 5.06rem;--wp--preset--shadow--natural: 6px 6px 9px rgba(0, 0, 0, 0.2);--wp--preset--shadow--deep: 12px 12px 50px rgba(0, 0, 0, 0.4);--wp--preset--shadow--sharp: 6px 6px 0px rgba(0, 0, 0, 0.2);--wp--preset--shadow--outlined: 6px 6px 0px -3px rgba(255, 255, 255, 1), 6px 6px rgba(0, 0, 0, 1);--wp--preset--shadow--crisp: 6px 6px 0px rgba(0, 0, 0, 1);}:where(.is-layout-flex){gap: 0.5em;}:where(.is-layout-grid){gap: 0.5em;}body .is-layout-flex{display: flex;}body .is-layout-flex{flex-wrap: wrap;align-items: center;}body .is-layout-flex > *{margin: 0;}body .is-layout-grid{display: grid;}body .is-layout-grid > *{margin: 0;}:where(.wp-block-columns.is-layout-flex){gap: 2em;}:where(.wp-block-columns.is-layout-grid){gap: 2em;}:where(.wp-block-post-template.is-layout-flex){gap: 1.25em;}:where(.wp-block-post-template.is-layout-grid){gap: 1.25em;}.has-black-color{color: var(--wp--preset--color--black) !important;}.has-cyan-bluish-gray-color{color: var(--wp--preset--color--cyan-bluish-gray) !important;}.has-white-color{color: var(--wp--preset--color--white) !important;}.has-pale-pink-color{color: var(--wp--preset--color--pale-pink) !important;}.has-vivid-red-color{color: var(--wp--preset--color--vivid-red) !important;}.has-luminous-vivid-orange-color{color: var(--wp--preset--color--luminous-vivid-orange) !important;}.has-luminous-vivid-amber-color{color: var(--wp--preset--color--luminous-vivid-amber) !important;}.has-light-green-cyan-color{color: var(--wp--preset--color--light-green-cyan) !important;}.has-vivid-green-cyan-color{color: var(--wp--preset--color--vivid-green-cyan) !important;}.has-pale-cyan-blue-color{color: var(--wp--preset--color--pale-cyan-blue) !important;}.has-vivid-cyan-blue-color{color: var(--wp--preset--color--vivid-cyan-blue) !important;}.has-vivid-purple-color{color: var(--wp--preset--color--vivid-purple) !important;}.has-black-background-color{background-color: var(--wp--preset--color--black) !important;}.has-cyan-bluish-gray-background-color{background-color: var(--wp--preset--color--cyan-bluish-gray) !important;}.has-white-background-color{background-color: var(--wp--preset--color--white) !important;}.has-pale-pink-background-color{background-color: var(--wp--preset--color--pale-pink) !important;}.has-vivid-red-background-color{background-color: var(--wp--preset--color--vivid-red) !important;}.has-luminous-vivid-orange-background-color{background-color: var(--wp--preset--color--luminous-vivid-orange) !important;}.has-luminous-vivid-amber-background-color{background-color: var(--wp--preset--color--luminous-vivid-amber) !important;}.has-light-green-cyan-background-color{background-color: var(--wp--preset--color--light-green-cyan) !important;}.has-vivid-green-cyan-background-color{background-color: var(--wp--preset--color--vivid-green-cyan) !important;}.has-pale-cyan-blue-background-color{background-color: var(--wp--preset--color--pale-cyan-blue) !important;}.has-vivid-cyan-blue-background-color{background-color: var(--wp--preset--color--vivid-cyan-blue) !important;}.has-vivid-purple-background-color{background-color: var(--wp--preset--color--vivid-purple) !important;}.has-black-border-color{border-color: var(--wp--preset--color--black) !important;}.has-cyan-bluish-gray-border-color{border-color: var(--wp--preset--color--cyan-bluish-gray) !important;}.has-white-border-color{border-color: var(--wp--preset--color--white) !important;}.has-pale-pink-border-color{border-color: var(--wp--preset--color--pale-pink) !important;}.has-vivid-red-border-color{border-color: var(--wp--preset--color--vivid-red) !important;}.has-luminous-vivid-orange-border-color{border-color: var(--wp--preset--color--luminous-vivid-orange) !important;}.has-luminous-vivid-amber-border-color{border-color: var(--wp--preset--color--luminous-vivid-amber) !important;}.has-light-green-cyan-border-color{border-color: var(--wp--preset--color--light-green-cyan) !important;}.has-vivid-green-cyan-border-color{border-color: var(--wp--preset--color--vivid-green-cyan) !important;}.has-pale-cyan-blue-border-color{border-color: var(--wp--preset--color--pale-cyan-blue) !important;}.has-vivid-cyan-blue-border-color{border-color: var(--wp--preset--color--vivid-cyan-blue) !important;}.has-vivid-purple-border-color{border-color: var(--wp--preset--color--vivid-purple) !important;}.has-vivid-cyan-blue-to-vivid-purple-gradient-background{background: var(--wp--preset--gradient--vivid-cyan-blue-to-vivid-purple) !important;}.has-light-green-cyan-to-vivid-green-cyan-gradient-background{background: var(--wp--preset--gradient--light-green-cyan-to-vivid-green-cyan) !important;}.has-luminous-vivid-amber-to-luminous-vivid-orange-gradient-background{background: var(--wp--preset--gradient--luminous-vivid-amber-to-luminous-vivid-orange) !important;}.has-luminous-vivid-orange-to-vivid-red-gradient-background{background: var(--wp--preset--gradient--luminous-vivid-orange-to-vivid-red) !important;}.has-very-light-gray-to-cyan-bluish-gray-gradient-background{background: var(--wp--preset--gradient--very-light-gray-to-cyan-bluish-gray) !important;}.has-cool-to-warm-spectrum-gradient-background{background: var(--wp--preset--gradient--cool-to-warm-spectrum) !important;}.has-blush-light-purple-gradient-background{background: var(--wp--preset--gradient--blush-light-purple) !important;}.has-blush-bordeaux-gradient-background{background: var(--wp--preset--gradient--blush-bordeaux) !important;}.has-luminous-dusk-gradient-background{background: var(--wp--preset--gradient--luminous-dusk) !important;}.has-pale-ocean-gradient-background{background: var(--wp--preset--gradient--pale-ocean) !important;}.has-electric-grass-gradient-background{background: var(--wp--preset--gradient--electric-grass) !important;}.has-midnight-gradient-background{background: var(--wp--preset--gradient--midnight) !important;}.has-small-font-size{font-size: var(--wp--preset--font-size--small) !important;}.has-medium-font-size{font-size: var(--wp--preset--font-size--medium) !important;}.has-large-font-size{font-size: var(--wp--preset--font-size--large) !important;}.has-x-large-font-size{font-size: var(--wp--preset--font-size--x-large) !important;} .wp-block-navigation a:where(:not(.wp-element-button)){color: inherit;} :where(.wp-block-post-template.is-layout-flex){gap: 1.25em;}:where(.wp-block-post-template.is-layout-grid){gap: 1.25em;} :where(.wp-block-columns.is-layout-flex){gap: 2em;}:where(.wp-block-columns.is-layout-grid){gap: 2em;} .wp-block-pullquote{font-size: 1.5em;line-height: 1.6;} </style> <link rel='stylesheet' id='contact-form-7-css' href='https://dmarc.org/wp-content/plugins/contact-form-7/includes/css/styles.css?ver=5.7.7' type='text/css' media='all' /> <link rel='stylesheet' id='albar-google-font-body-css' href='//fonts.googleapis.com/css?family=Open+Sans%3A400%2C300%2C300italic%2C400italic%2C600%2C600italic%2C700%2C700italic&ver=10.1.1' type='text/css' media='all' /> <link rel='stylesheet' id='albar-google-font-heading-css' href='//fonts.googleapis.com/css?family=Roboto%3A400%2C300%2C300italic%2C400italic%2C500%2C500italic%2C700%2C700italic&ver=10.1.1' type='text/css' media='all' /> <link rel='stylesheet' id='albar-fontawesome-css' href='https://dmarc.org/wp-content/themes/albar/includes/font-awesome/css/font-awesome.css?ver=4.0.3' type='text/css' media='all' /> <link rel='stylesheet' id='albar-style-css' href='https://dmarc.org/wp-content/themes/albar/style.css?ver=10.1.1' type='text/css' media='all' /> <script type="text/javascript" src="https://dmarc.org/wp-includes/js/jquery/jquery.min.js?ver=3.7.1" id="jquery-core-js"></script> <script type="text/javascript" src="https://dmarc.org/wp-includes/js/jquery/jquery-migrate.min.js?ver=3.4.1" id="jquery-migrate-js"></script> <!-- Google tag (gtag.js) snippet added by Site Kit --> <!-- Google Analytics snippet added by Site Kit --> <script type="text/javascript" src="https://www.googletagmanager.com/gtag/js?id=GT-KVJKXZ9" id="google_gtagjs-js" async></script> <script type="text/javascript" id="google_gtagjs-js-after"> /* <![CDATA[ */ window.dataLayer = window.dataLayer || [];function gtag(){dataLayer.push(arguments);} gtag("set","linker",{"domains":["dmarc.org"]}); gtag("js", new Date()); gtag("set", "developer_id.dZTNiMT", true); gtag("config", "GT-KVJKXZ9"); /* ]]> */ </script> <!-- End Google tag (gtag.js) snippet added by Site Kit --> <link rel="https://api.w.org/" href="https://dmarc.org/wp-json/" /><link rel="EditURI" type="application/rsd+xml" title="RSD" href="https://dmarc.org/xmlrpc.php?rsd" /> <meta name="generator" content="Site Kit by Google 1.124.0" /><style type="text/css" id="custom-background-css"> body.custom-background { background-color: #006699; } </style> <style type="text/css" media="screen"> body, .page-header h1, .alba-banner-heading h5, .alba-carousel-block, .alba-heading-text { color: #000000; font-family: 'Open Sans', sans-serif; } h1, h2, h3, h4, h5, h6, h1 a, h2 a, h3 a, h4 a, h5 a, h6 a { color: #006699; font-family: 'Roboto', sans-serif; } .alba-button, .post .alba-blog-permalink-btn, .search article.page .alba-blog-permalink-btn, .wpcf7-submit, #alba-home-slider-prev, #alba-home-slider-next, .alba-carousel-arrow-prev, .alba-carousel-arrow-next { background-color: #006699; } .site-header-one .site-title a, .site-header-two .site-title a, .site-header-one .site-top-bar i, .site-header-two .site-social i, .navigation-main li:hover > a, li.current_page_item > a, li.current_page_ancestor > a, .page-header .cx-breadcrumbs a, .sidebar-navigation-left .current_page_item, .sidebar-navigation-right .current_page_item, .entry-content a, .alba-blog-standard-block a, .widget ul li a, #comments .logged-in-as a, .alba-heading i, .alba-heading b, .alba-banner-heading h3 b { color: #006699; } .navigation-main li.current_page_item, .navigation-main li.current_page_ancestor { border-bottom: 2px solid #006699; } .navigation-main ul ul { border-top: 2px solid #006699; } .alba-button:hover, .wpcf7-submit:hover, .post .alba-blog-permalink-btn:hover, .search article.page .alba-blog-permalink-btn:hover, #alba-home-slider-prev:hover, #alba-home-slider-next:hover, .alba-carousel-arrow-prev:hover, .alba-carousel-arrow-next:hover { background-color: #3e578b; } .entry-content a:hover, h1 a:hover, h2 a:hover, h3 a:hover, h4 a:hover, h5 a:hover, h6 a:hover, .alba-blog-standard-block a:hover, #comments .logged-in-as a:hover, .widget .tagcloud a:hover, .sidebar-navigation ul li a:hover, .cx-breadcrumbs a:hover, .widget ul li a:hover { color: #3e578b; } .sidebar-navigation-left .current_page_item { box-shadow: 3px 0 0 #006699 inset; } .sidebar-navigation-right .current_page_item { box-shadow: -3px 0 0 #006699 inset; } </style> </head> <body class="archive date custom-background group-blog"> <div class="site-boxed"> <header id="masthead" class="site-header site-header-two bg-left" role="banner"> <div class="site-top-bar site-pad"> <div class="site-container"> <div class="site-top-bar-left"> </div> <div class="site-top-bar-right"> </div> <div class="clearboth"></div> </div> </div> <div class="header-bar site-pad"> <div class="site-container"> <div class="header-bar-inner"> <div class="site-branding"> <a href="https://dmarc.org/" title="dmarc.org" rel="home"><img src="https://dmarc.org/wp-content/uploads/2015/02/DMARC-2015-logo-small-202x110.png" alt="dmarc.org" /></a> </div> <div class="site-header-right"> <div class="site-social"> </div> <nav id="site-navigation" class="navigation-main" role="navigation"> <h1 class="menu-toggle">Menu</h1> <div class="menu-main-menu-container"><ul id="menu-main-menu" class="menu"><li id="menu-item-86" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-home menu-item-86"><a href="https://dmarc.org/">Home</a></li> <li id="menu-item-84" class="menu-item menu-item-type-post_type menu-item-object-page current_page_parent menu-item-84"><a href="https://dmarc.org/blog/">Blog</a></li> <li id="menu-item-85" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children menu-item-85"><a href="https://dmarc.org/resources/">Resources</a> <ul class="sub-menu"> <li id="menu-item-97" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-97"><a href="https://dmarc.org/resources/articles-tutorials-and-videos/">Articles, Tutorials and Videos</a></li> <li id="menu-item-95" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-95"><a href="https://dmarc.org/resources/code-and-libraries/">Code and Libraries</a></li> <li id="menu-item-96" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-96"><a href="https://dmarc.org/resources/deployment-tools/">Deployment Tools</a></li> <li id="menu-item-373" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-has-children menu-item-373"><a href="https://dmarc.org/wiki/FAQ">FAQ</a> <ul class="sub-menu"> <li id="menu-item-374" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-374"><a href="https://dmarc.org/wiki/FAQ#general-questions">General Questions</a></li> <li id="menu-item-375" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-375"><a href="https://dmarc.org/wiki/FAQ#end-users">End User Questions</a></li> <li id="menu-item-376" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-376"><a href="https://dmarc.org/wiki/FAQ#receivers">Receiver Questions</a></li> <li id="menu-item-377" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-377"><a href="https://dmarc.org/wiki/FAQ#senders">Sender Questions</a></li> </ul> </li> <li id="menu-item-88" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children menu-item-88"><a href="https://dmarc.org/overview/">Overview</a> <ul class="sub-menu"> <li id="menu-item-564" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-564"><a href="https://dmarc.org/who-is-using-dmarc/">Who Is Using DMARC?</a></li> </ul> </li> <li id="menu-item-94" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-94"><a href="https://dmarc.org/resources/products-and-services/">Products and Services</a></li> <li id="menu-item-98" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-98"><a href="https://dmarc.org/resources/specification/">Specifications</a></li> </ul> </li> <li id="menu-item-729" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children menu-item-729"><a href="https://dmarc.org/stats/">Statistics</a> <ul class="sub-menu"> <li id="menu-item-1250" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-1250"><a href="https://dmarc.org/stats/bimi/">Statistics – BIMI</a></li> <li id="menu-item-1249" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-1249"><a href="https://dmarc.org/stats/dkim/">Statistics – DKIM</a></li> <li id="menu-item-1228" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-1228"><a href="https://dmarc.org/stats/dmarc/">Statistics – DMARC</a></li> <li id="menu-item-731" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-731"><a href="https://dmarc.org/stats/alexa-top-sites/">Alexa Top Web Sites (2015-2017)</a></li> </ul> </li> <li id="menu-item-90" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children menu-item-90"><a href="https://dmarc.org/about/">About</a> <ul class="sub-menu"> <li id="menu-item-287" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-287"><a href="https://dmarc.org/about/sponsors/">Sponsors and Supporters</a></li> <li id="menu-item-293" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-293"><a href="https://dmarc.org/about/leadership/">Leadership</a></li> <li id="menu-item-286" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-286"><a href="https://dmarc.org/about/history/">History</a></li> </ul> </li> <li id="menu-item-89" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-89"><a href="https://dmarc.org/participate/">Participate</a></li> </ul></div> </nav><!-- #site-navigation --> </div> <div class="clearboth"></div> </div> <div class="search-block"> <form role="search" method="get" class="search-form" action="https://dmarc.org/"> <label> <input type="search" class="search-field" placeholder="Search…" value="" name="s" title="Search for:" /> </label> <input type="submit" class="search-submit" value=" " /> </form> </div> </div> </div> <div class="clearboth"></div> </header><!-- #masthead --> <div class="page-header"> <div class="site-container"> <h1> Month: <span>March 2017</span> </h1> <div class="cx-breadcrumbs"> </div> </div> </div> <div class="site-body site-pad"> <div class="site-container"> <div id="primary" class="content-area"> <article id="post-843" class="alba-blog-standard-block post-843 post type-post status-publish format-standard hentry category-blog tag-aggregate-reports tag-dkim tag-dmarc tag-forwarding tag-reporting tag-spf tag-third-party-senders"> <div class="alba-blog-standard-block-imgs"> <div class="alba-blog-standard-block-img-carousel-wrapper alba-blog-standard-block-img-wrapper-remove"> <div class="alba-blog-standard-block-img-prev"></div> <div class="alba-blog-standard-block-img-next"></div> <div class="alba-blog-standard-block-img-carousel alba-blog-standard-block-img-remove"> <img src="https://dmarc.org/wp-content/uploads/2017/03/dmarcian-forwarders-2017-03-05.png" alt="Report: Forwarded Email" /> <img src="https://dmarc.org/wp-content/uploads/2017/03/SPF-forwarding-example.png" alt="SPF-forwarding-example" /> </div> </div> </div> <div class="alba-blog-standard-block-content alba-blog-standard-has-images"> <header class="entry-header"> <h3 class="entry-title"><a href="https://dmarc.org/2017/03/can-i-use-dmarc-if-i-have-only-deployed-spf/" rel="bookmark">Can I Use DMARC If I Have Only Deployed SPF?</a></h3> <div class="entry-meta"> <i class="fa fa-calendar"></i> <a href="https://dmarc.org/2017/03/can-i-use-dmarc-if-i-have-only-deployed-spf/" title="6:30 am" rel="bookmark"><time class="entry-date published" datetime="2017-03-06T06:30:16-08:00">March 6, 2017</time><time class="updated" datetime="2017-03-06T00:58:39-08:00">March 6, 2017</time></a><span class="byline"><span class="author vcard"> <i class="fa fa-user"></i> <a class="url fn n" href="https://dmarc.org/author/smj/" title="View all posts by Steve Jones" rel="author">Steve Jones</a></span></span> </div> </header> <div class="entry-content"> <p>A question people asked repeatedly in 2016 was whether or not their organization could deploy DMARC if they only used SPF at present. They knew the recommendation is to use both DKIM and SPF, and were concerned that their organizations couldn’t benefit from DMARC without DKIM. The short answer is that you can use DMARC […]</p> </div> <footer class="alba-blog-standard-post-footer"> <div class="alba-blog-standard-post-footer-left"> <span class="cat-links"> <i class="fa fa-list"></i> Posted in <a href="https://dmarc.org/category/blog/" rel="category tag">Blog</a> </span> <span class="tags-links"> <i class="fa fa-tags"></i> Tags <a href="https://dmarc.org/tag/aggregate-reports/" rel="tag">aggregate reports</a>, <a href="https://dmarc.org/tag/dkim/" rel="tag">DKIM</a>, <a href="https://dmarc.org/tag/dmarc/" rel="tag">DMARC</a>, <a href="https://dmarc.org/tag/forwarding/" rel="tag">forwarding</a>, <a href="https://dmarc.org/tag/reporting/" rel="tag">reporting</a>, <a href="https://dmarc.org/tag/spf/" rel="tag">SPF</a>, <a href="https://dmarc.org/tag/third-party-senders/" rel="tag">third-party senders</a> </span> </div> <div class="alba-blog-standard-post-footer-right"> <a href="https://dmarc.org/2017/03/can-i-use-dmarc-if-i-have-only-deployed-spf/" class="alba-blog-permalink-btn">Read More</a> </div> <div class="clearboth"></div> </footer> </div> <div class="clearboth"></div> </article> </div><!-- #primary --> <div id="secondary" class="widget-area" role="complementary"> <aside id="search-2" class="widget widget_search"><form role="search" method="get" class="search-form" action="https://dmarc.org/"> <label> <input type="search" class="search-field" placeholder="Search…" value="" name="s" title="Search for:" /> </label> <input type="submit" class="search-submit" value=" " /> </form></aside> <aside id="recent-posts-2" class="widget widget_recent_entries"> <h1 class="widget-title">Recent Posts</h1> <ul> <li> <a href="https://dmarc.org/2024/10/dmarc-org-at-sixth-jpaawg-general-meeting/">DMARC.org at Sixth JPAAWG General Meeting</a> </li> <li> <a href="https://dmarc.org/2023/05/m3aawg-calls-for-coalition-to-support-public-suffix-list/">M3AAWG Calls for Coalition to Support Public Suffix List</a> </li> <li> <a href="https://dmarc.org/2023/02/microsoft-allows-365-admins-to-accept-arc-forwarders/">Microsoft Allows 365 Admins To Accept ARC Forwarders</a> </li> <li> <a href="https://dmarc.org/2022/12/dmarc-org-at-fifth-jpaawg-general-meeting/">DMARC.org at Fifth JPAAWG General Meeting</a> </li> <li> <a href="https://dmarc.org/2022/03/dmarc-policies-up-84-for-2021/">DMARC Policies Up 84% for 2021</a> </li> </ul> </aside><aside id="archives-2" class="widget widget_archive"><h1 class="widget-title">Archives</h1> <ul> <li><a href='https://dmarc.org/2024/10/'>October 2024</a></li> <li><a href='https://dmarc.org/2023/05/'>May 2023</a></li> <li><a href='https://dmarc.org/2023/02/'>February 2023</a></li> <li><a href='https://dmarc.org/2022/12/'>December 2022</a></li> <li><a href='https://dmarc.org/2022/03/'>March 2022</a></li> <li><a href='https://dmarc.org/2022/02/'>February 2022</a></li> <li><a href='https://dmarc.org/2022/01/'>January 2022</a></li> <li><a href='https://dmarc.org/2021/10/'>October 2021</a></li> <li><a href='https://dmarc.org/2021/02/'>February 2021</a></li> <li><a href='https://dmarc.org/2021/01/'>January 2021</a></li> <li><a href='https://dmarc.org/2020/11/'>November 2020</a></li> <li><a href='https://dmarc.org/2020/02/'>February 2020</a></li> <li><a href='https://dmarc.org/2019/12/'>December 2019</a></li> <li><a href='https://dmarc.org/2019/07/'>July 2019</a></li> <li><a href='https://dmarc.org/2019/02/'>February 2019</a></li> <li><a href='https://dmarc.org/2018/11/'>November 2018</a></li> <li><a href='https://dmarc.org/2018/10/'>October 2018</a></li> <li><a href='https://dmarc.org/2018/09/'>September 2018</a></li> <li><a href='https://dmarc.org/2018/02/'>February 2018</a></li> <li><a href='https://dmarc.org/2017/12/'>December 2017</a></li> <li><a href='https://dmarc.org/2017/11/'>November 2017</a></li> <li><a href='https://dmarc.org/2017/09/'>September 2017</a></li> <li><a href='https://dmarc.org/2017/07/'>July 2017</a></li> <li><a href='https://dmarc.org/2017/06/'>June 2017</a></li> <li><a href='https://dmarc.org/2017/03/' aria-current="page">March 2017</a></li> <li><a href='https://dmarc.org/2016/12/'>December 2016</a></li> <li><a href='https://dmarc.org/2016/11/'>November 2016</a></li> <li><a href='https://dmarc.org/2016/10/'>October 2016</a></li> <li><a href='https://dmarc.org/2016/08/'>August 2016</a></li> <li><a href='https://dmarc.org/2016/07/'>July 2016</a></li> <li><a href='https://dmarc.org/2016/06/'>June 2016</a></li> <li><a href='https://dmarc.org/2016/05/'>May 2016</a></li> <li><a href='https://dmarc.org/2016/03/'>March 2016</a></li> <li><a href='https://dmarc.org/2016/02/'>February 2016</a></li> <li><a href='https://dmarc.org/2016/01/'>January 2016</a></li> <li><a href='https://dmarc.org/2015/12/'>December 2015</a></li> <li><a href='https://dmarc.org/2015/11/'>November 2015</a></li> <li><a href='https://dmarc.org/2015/10/'>October 2015</a></li> <li><a href='https://dmarc.org/2015/09/'>September 2015</a></li> <li><a href='https://dmarc.org/2015/08/'>August 2015</a></li> <li><a href='https://dmarc.org/2015/07/'>July 2015</a></li> <li><a href='https://dmarc.org/2015/06/'>June 2015</a></li> <li><a href='https://dmarc.org/2015/04/'>April 2015</a></li> <li><a href='https://dmarc.org/2015/03/'>March 2015</a></li> <li><a href='https://dmarc.org/2015/02/'>February 2015</a></li> <li><a href='https://dmarc.org/2015/01/'>January 2015</a></li> <li><a href='https://dmarc.org/2014/12/'>December 2014</a></li> <li><a href='https://dmarc.org/2014/02/'>February 2014</a></li> <li><a href='https://dmarc.org/2013/02/'>February 2013</a></li> <li><a href='https://dmarc.org/2012/10/'>October 2012</a></li> <li><a href='https://dmarc.org/2012/01/'>January 2012</a></li> </ul> </aside> </div> </div> </div> <div class="clearboth"></div> <footer id="colophon" class="site-footer" role="contentinfo"> <div class="footer-bottom-bar site-pad"> <div class="site-container"> <div class="scroll-to-top"><i class="fa fa-angle-up"></i></div> <!-- Scroll To Top Button --> <div class="footer-left"> Unless otherwise noted, all content on this website is (<a href="http://creativecommons.org/licenses/by/3.0/">CC By 3.0</a>) by DMARC.org </div> <div class="footer-right"> </div> <div class="clearboth"></div> </div><!-- .site-info --> </div> </footer><!-- #colophon --> </div> <script type="text/javascript" src="https://dmarc.org/wp-content/plugins/contact-form-7/includes/swv/js/index.js?ver=5.7.7" id="swv-js"></script> <script type="text/javascript" id="contact-form-7-js-extra"> /* <![CDATA[ */ var wpcf7 = {"api":{"root":"https:\/\/dmarc.org\/wp-json\/","namespace":"contact-form-7\/v1"}}; /* ]]> */ </script> <script type="text/javascript" src="https://dmarc.org/wp-content/plugins/contact-form-7/includes/js/index.js?ver=5.7.7" id="contact-form-7-js"></script> <script type="text/javascript" src="https://dmarc.org/wp-content/themes/albar/js/navigation.js?ver=10.1.1" id="albar-navigation-js"></script> <script type="text/javascript" src="https://dmarc.org/wp-content/themes/albar/js/jquery.carouFredSel-6.2.1-packed.js?ver=10.1.1" id="albar-caroufredSel-js"></script> <script type="text/javascript" src="https://dmarc.org/wp-content/themes/albar/js/waypoints.min.js?ver=10.1.1" id="albar-waypoints-js"></script> <script type="text/javascript" src="https://dmarc.org/wp-content/themes/albar/js/waypoints-sticky.min.js?ver=10.1.1" id="albar-waypoints-sticky-js"></script> <script type="text/javascript" src="https://dmarc.org/wp-content/themes/albar/js/custom.js?ver=10.1.1" id="albar-customjs-js"></script> <script type="text/javascript" src="https://dmarc.org/wp-content/themes/albar/js/skip-link-focus-fix.js?ver=10.1.1" id="albar-skip-link-focus-fix-js"></script> <script type="text/javascript" src="https://www.google.com/recaptcha/api.js?render=6LcBkJIUAAAAAHY8LeuV-omUtdVUjTQY3gJtQ2Rr&ver=3.0" id="google-recaptcha-js"></script> <script type="text/javascript" src="https://dmarc.org/wp-includes/js/dist/vendor/wp-polyfill-inert.min.js?ver=3.1.2" id="wp-polyfill-inert-js"></script> <script type="text/javascript" src="https://dmarc.org/wp-includes/js/dist/vendor/regenerator-runtime.min.js?ver=0.14.0" id="regenerator-runtime-js"></script> <script type="text/javascript" src="https://dmarc.org/wp-includes/js/dist/vendor/wp-polyfill.min.js?ver=3.15.0" id="wp-polyfill-js"></script> <script type="text/javascript" id="wpcf7-recaptcha-js-extra"> /* <![CDATA[ */ var wpcf7_recaptcha = {"sitekey":"6LcBkJIUAAAAAHY8LeuV-omUtdVUjTQY3gJtQ2Rr","actions":{"homepage":"homepage","contactform":"contactform"}}; /* ]]> */ </script> <script type="text/javascript" src="https://dmarc.org/wp-content/plugins/contact-form-7/modules/recaptcha/index.js?ver=5.7.7" id="wpcf7-recaptcha-js"></script> </body> </html>