{"id":21223,"date":"2025-05-01T00:00:00","date_gmt":"2025-05-01T00:00:00","guid":{"rendered":"https:\/\/www.mailgun.com\/blog\/microsoft-requisitos-remetente\/"},"modified":"2026-09-15T11:52:37","modified_gmt":"2026-09-15T11:52:37","slug":"microsoft-requisitos-remetente","status":"publish","type":"blog","link":"https:\/\/www.mailgun.com\/pt\/blog\/deliverability\/microsoft-requisitos-remetente\/","title":{"rendered":"Novos requisitos de remetente do Microsoft Outlook: o que os senhores precisam fazer at\u00e9 5 de maio"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">If you thought you were finally getting a break from the sender requirement conversation after the industry shift brought by Google and Yahoo last year, not quite. Microsoft is stepping up to the plate. In its April 2, blog, Microsoft announced new requirements for high-volume senders reaching Outlook.com, Hotmail.com, and Live.com addresses.<\/p>\n\n<p class=\"wp-block-paragraph\">If you\u2019re sending more than 5,000 messages a day to Microsoft consumer domains, keep reading. These changes are about protecting recipients, cracking down on spoofing, and setting a higher bar for sender authentication.<\/p>\n\n<p class=\"wp-block-paragraph\">Let\u2019s break down what\u2019s changing and what actions you need to take.<\/p>\n\r\n    <nav data-content-type=\"longform\" class=\"toc-block longform-spacings px-5 py-6 px-md-6 px-lg-7 py-md-7 bg-light fs-sm rounded-lg\" aria-labelledby=\"toc-title-1362\"><p class=\"h5 m-0\" id=\"toc-title-1362\">\u00cdndice<\/p><div class=\"d-flex mt-3\"><div class=\"w-auto fw-bold text-accent d-flex me-2\">01<\/div><div class=\"d-flex flex-column\"><a class=\"fw-bold scrollme link-body-color text-accent\" href=\"#what-are-the-microsoft-sender-requirements\">What are the Microsoft sender requirements?<\/a><\/div><\/div><div class=\"d-flex mt-3\"><div class=\"w-auto fw-bold text-accent d-flex me-2\">02<\/div><div class=\"d-flex flex-column\"><a class=\"fw-bold scrollme link-body-color text-accent\" href=\"#what-else-should-senders-be-doing\">What else should senders be doing?<\/a><\/div><\/div><div class=\"d-flex mt-3\"><div class=\"w-auto fw-bold text-accent d-flex me-2\">03<\/div><div class=\"d-flex flex-column\"><a class=\"fw-bold scrollme link-body-color text-accent\" href=\"#what-about-one-click-unsubscribe-rfc-8058\">What about one-click unsubscribe (RFC 8058)?<\/a><\/div><\/div><div class=\"d-flex mt-3\"><div class=\"w-auto fw-bold text-accent d-flex me-2\">04<\/div><div class=\"d-flex flex-column\"><a class=\"fw-bold scrollme link-body-color text-accent\" href=\"#timeline-and-enforcement\">Timeline and enforcement<\/a><\/div><\/div><div class=\"d-flex mt-3\"><div class=\"w-auto fw-bold text-accent d-flex me-2\">05<\/div><div class=\"d-flex flex-column\"><a class=\"fw-bold scrollme link-body-color text-accent\" href=\"#why-do-these-industry-requirements-matter\">Why do these industry requirements matter?<\/a><\/div><\/div><div class=\"d-flex mt-3\"><div class=\"w-auto fw-bold text-accent d-flex me-2\">06<\/div><div class=\"d-flex flex-column\"><a class=\"fw-bold scrollme link-body-color text-accent\" href=\"#what-are-the-differences-between-sender-requirements-across-providers\">What are the differences between sender requirements across providers?<\/a><\/div><\/div><div class=\"d-flex mt-3\"><div class=\"w-auto fw-bold text-accent d-flex me-2\">07<\/div><div class=\"d-flex flex-column\"><a class=\"fw-bold scrollme link-body-color text-accent\" href=\"#what-to-do-next\">What to do next<\/a><\/div><\/div><\/nav>\n<h2 class=\"wp-block-heading\">What are the Microsoft sender requirements?<\/h2>\n\n<p class=\"wp-block-paragraph\">Beginning <b>May 5, 2025<\/b>, Microsoft will start filtering\u2014or even rejecting\u2014messages that don\u2019t meet their authentication standards. The good news, if you\u2019re already compliant with the Gmail\/Yahoo standards you\u2019re set. Here&#8217;s what you need to have in place:<\/p>\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.mailgun.com\/blog\/deliverability\/spf-records-basics\/\" target=\"_tabs\" rel=\"noopener noreferrer\"><b>SPF (Sender Policy Framework):<\/b><\/a> Your domain must pass SPF checks. That means your DNS records need to clearly define who\u2019s allowed to send mail on your behalf.<\/li>\n\n\n\n<li><a href=\"https:\/\/www.mailgun.com\/pt\/blog\/deliverability\/entender-dkim-como-funciona\/\" target=\"_tabs\" rel=\"noopener noreferrer\"><b>DKIM (DomainKeys Identified Mail):<\/b><\/a> DKIM is required to verify message integrity. Microsoft will expect signed messages that confirm the sender is who they say they are.<\/li>\n\n\n\n<li><a href=\"https:\/\/www.mailgun.com\/pt\/blog\/deliverability\/implementar-dmarc\/\" target=\"_tabs\" rel=\"noopener noreferrer\"><b>DMARC (Domain-based Message Authentication, Reporting, and Conformance):<\/b><\/a><b> <\/b>A valid DMARC policy is now a must. At minimum, you need a policy <a href=\"https:\/\/www.mailgun.com\/blog\/deliverability\/dmarc-insights-from-dmarcian\/\" target=\"_tabs\" rel=\"noopener noreferrer\">of <b>p=none<\/b><\/a>, and it must align with SPF or DKIM\u2014ideally both.<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Messages that don\u2019t meet these requirements? They\u2019ll be routed to the Junk folder at first, and if left unaddressed, will eventually be blocked outright.<\/p>\n    <div data-content-type=\"longform\"  class=\"callout text-body-color px-5 py-6 px-md-6 px-lg-7 py-md-7 longform-spacings rounded-lg bg-light\" data-theme=\"light\">\r\n\r\n        <div class=\"content-body\"> Sinch Mailgun has introduced free DMARC reporting for all Mailgun senders on a paid plan through a new collaboration with <a href=\"https:\/\/redsift.com\/\">Red Sift<\/a>. This enhancement gives Mailgun users greater visibility into email authentication results.<\/div>\r\n    <\/div>\r\n\n<h2 class=\"wp-block-heading\">What else should senders be doing?<\/h2>\n\n<p class=\"wp-block-paragraph\">Microsoft is also calling on senders to follow a few critical best practices for \u201cquality and trust.\u201d These guidelines support deliverability and help protect recipients.<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Use real, reply-capable \u201cFrom\u201d or \u201cReply-To\u201d addresses.<\/li>\n\n\n\n<li>Include a visible, functional unsubscribe link\u2014especially in bulk or marketing emails.<\/li>\n\n\n\n<li>Keep your list clean. Regularly remove invalid contacts and monitor bounce rates.<\/li>\n\n\n\n<li>Be upfront in your subject lines and headers. Deceptive content won\u2019t help anyone.<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Microsoft has made it clear: if you don\u2019t follow these practices<b> (Microsoft specifically called out authentication and <\/b><a href=\"https:\/\/www.mailgun.com\/blog\/deliverability\/importance-of-email-list-cleaning\/\" target=\"_tabs\" rel=\"noopener noreferrer\"><b>list hygiene<\/b><\/a><b>) <\/b>and deliverability issues persist, your messages could be filtered or blocked\u2014no formal requirement needed.<\/p>\n\n<h2 class=\"wp-block-heading\">What about one-click unsubscribe (RFC 8058)?<\/h2>\n\n<p class=\"wp-block-paragraph\">Unlike Gmail and Yahoo, Microsoft hasn\u2019t explicitly required support for <a href=\"https:\/\/www.mailgun.com\/pt\/blog\/deliverability\/o-que-e-rfc-8058\/\" target=\"_tabs\" rel=\"noopener noreferrer\">RFC 8058<\/a> or one-click unsubscribe. That said, providing a simple opt-out experience is required with \u201cfunctional unsubscribe links\u201d that are clear and visible.<\/p>\n\n<h2 class=\"wp-block-heading\">Timeline and enforcement<\/h2>\n\n<p class=\"wp-block-paragraph\">Here\u2019s how things will roll out:<\/p>\n\n<ul class=\"wp-block-list\">\n<li><b>Now:<\/b> Audit your SPF, DKIM, and DMARC records. Make sure they\u2019re aligned and functioning properly.<\/li>\n\n\n\n<li><b>May 5, 2025\u00a0<\/b> Messages will be rejected that don&#8217;t pass the required authentication requirements detailed above (SPF, DKIM, DMARC). The rejected messages will be designated as &#8220;550; 5.7.515 Access denied, sending domain [SendingDomain] does <b>not<\/b> meet the required authentication level.&#8221;\u00a0(Updated May 1, 2025)\u00a0<\/li>\n\n\n\n<li><b>Later (date TBD):<\/b> Expect full rejections for senders who remain non-compliant.<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\">Why do these industry requirements matter?<\/h2>\n\n<p class=\"wp-block-paragraph\">Gmail and Yahoo kicked it off, but we knew then that inbox standards were going to become more universally strict. And that actually benefits senders as well. If your authentication setup isn\u2019t dialed in, your emails may never reach the inbox\u2014even if your content is great and your audience wants to hear from you.<\/p>\n    <div data-content-type=\"longform\" class=\"quote hub-quote longform-spacings d-flex flex-column rounded-lg px-5 py-6 px-md-6 py-md-7 p-lg-7 shadow-sm bg-primary\" data-theme=\"light\">\r\n\r\n        <div class=\"quote-logo mb-3\">\r\n                            <svg height=\"40\" class=\"quote-icon quote-icon-color\" aria-hidden=\"true\" data-url=\"https:\/\/www.mailgun.com\/wp-content\/plugins\/sinch-core\/assets\/icons\/custom-icons\/quotes-right.svg\"><\/svg>\r\n                    <\/div>\r\n\r\n        <blockquote class=\"quote-content content-body m-0 text-body-color\" id=\"quote-block-dc3c3e2a54948fda08e8ab0f81fef148\">\r\n            \u201cYou can get very philosophical about why now. I remember talking about these changes 10 years ago with a group and we said \u2018no auth, no entry\u2019, that is what we should be working towards because it makes a ton of sense being able to identify who is sending an email. It helps us assign your reputation to your identity. Email volume keeps increasing and there is a lot of noise and a lot of bad actors piggybacking on sender\u2019s good reputations. At some point on the mailbox provider side, we just had to say okay, that\u2019s enough.\u201d        <\/blockquote>\r\n\r\n                    <div class=\"d-flex gap-3 mt-5\">\r\n                                    <div>\r\n                        <img decoding=\"async\" width=\"72\" height=\"72\" class=\"rounded-lg quote-author\" src=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/06\/Marcel-Becker.png\" alt=\"Foto de Marcel Becker\">\r\n                    <\/div>\r\n                                <div class=\"d-flex flex-column align-self-center fs-sm\">\r\n                    <cite class=\"mb-0 fw-bold text-accent fst-normal\" aria-describedby=\"quote-block-dc3c3e2a54948fda08e8ab0f81fef148\">\r\n                        Marcel Becker                    <\/cite>\r\n                                            <span class=\"mb-0 text-body-color\">Sr. Director of Product Management at Yahoo<\/span>\r\n                                    <\/div>\r\n            <\/div>\r\n            <\/div>\r\n\n<h2 class=\"wp-block-heading\">What are the differences between sender requirements across providers?<\/h2>\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\nRequ\u00adire\u00adment\n<\/th><th>\nGmai\u00adl\n<\/th><th>\nMicr\u00adosoft (Out\u00adlook.com)\n<\/th><\/tr><\/thead><tbody><tr><td>\nAuth\u00adentication Volu\u00adme Thre\u00adshold\n<\/td><td>\n5,00\u00ad0+ mess\u00adages\/day to Gmai\u00adl, Yaho\u00ado does\u00adn\u2019t hold\u00ad to a stri\u00adct numb\u00ader but it is in the ball\u00adpark of 5000\u00ad.\n<\/td><td>\n5,00\u00ad0+ mess\u00adages\/day to Outl\u00adook.com, Hotm\u00adail.com, Live\u00ad.com\n<\/td><\/tr><tr><td>\nSPF (Sen\u00adder Poli\u00adcy Fram\u00adework)\n<\/td><td>\nReq\u00adui\u00adred\n<\/td><td>\nReq\u00adui\u00adred\n<\/td><\/tr><tr><td>\nDKIM\u00ad (Dom\u00adainKeys Iden\u00adtified Mail\u00ad)\n<\/td><td>\nReq\u00adui\u00adred\n<\/td><td>\nReq\u00adui\u00adred\n<\/td><\/tr><tr><td>\nDMAR\u00adC Poli\u00adcy\n<\/td><td>\nRequ\u00adired. Mini\u00admum poli\u00adcy:\u00a0p=none. Must\u00ad alig\u00adn with\u00ad SPF or DKIM\u00ad.\n<\/td><td>\nRequ\u00adired. Mini\u00admum poli\u00adcy:\u00a0p=none. Must\u00ad alig\u00adn with\u00ad SPF or DKIM\u00ad.\n<\/td><\/tr><tr><td>\nOne-\u00adClick Unsu\u00adbscribe (RFC\u00ad 8058\u00ad)\n<\/td><td>\nRequ\u00adired. Bulk\u00ad send\u00aders must\u00ad incl\u00adude RFC 8058\u00ad-compliant unsu\u00adbscribe.\n<\/td><td>\nUnsu\u00adbscribe link\u00ad requ\u00adired. RFC 8058\u00ad not requ\u00adired\n<\/td><\/tr><tr><td>\nList\u00ad Unsu\u00adbscribe Head\u00ader\n<\/td><td>\nRequ\u00adired. Must\u00ad supp\u00adort\u00a0List-Unsubscribe head\u00ader with\u00ad both\u00ad mail\u00adto: and URL.\u00ad\n<\/td><td>\nNot expl\u00adicitly requ\u00adired.\n<\/td><\/tr><tr><td>\nSpam\u00ad Rate\u00ad Thre\u00adshold\n<\/td><td>\nRequ\u00adired. Must\u00ad stay\u00ad belo\u00adw Gmai\u00adl\/Yahoo&#8217;s spam\u00ad comp\u00adlaint thre\u00adsholds of 0.3%\u00ad\n<\/td><td>\nNo thre\u00adshold defi\u00adned, requ\u00adired to have\u00ad clea\u00adn list\u00ads and enfo\u00adrce best\u00ad prac\u00adtices. Non comp\u00adliant send\u00aders may expe\u00adrience nega\u00adtive acti\u00adon.\n<\/td><\/tr><tr><td>\nTLS (Tra\u00adnsport Laye\u00adr Secu\u00adrity)\n<\/td><td>\nRequ\u00adired. Emai\u00adls must\u00ad be sent\u00ad over\u00ad TLS.\u00ad\n<\/td><td>\nNot ment\u00adioned in Micr\u00adosoft\u2019s late\u00adst poli\u00adcy upda\u00adtes.\n<\/td><\/tr><tr><td>\nVali\u00add HELO\u00ad\/EHLO\n<\/td><td>\nRequ\u00adired. Must\u00ad not use a dyna\u00admic IP or malf\u00adormed host\u00adname.\n<\/td><td>\nNot expl\u00adicitly requ\u00adired.\n<\/td><\/tr><tr><td>\nForw\u00adard\/Proxy Dete\u00adction\n<\/td><td>\nGmai\u00adl pena\u00adlizes misa\u00adligned forw\u00adarding or prox\u00ady beha\u00advior.\n<\/td><td>\nNo expl\u00adicit guid\u00adance prov\u00adided.\n<\/td><\/tr><tr><td>\nFrom\u00ad: Head\u00ader Alig\u00adnment\n<\/td><td>\nMust\u00ad alig\u00adn with\u00ad DKIM\u00ad\/DMARC doma\u00adin.\n<\/td><td>\nRec\u00adom\u00adme\u00adnded\n<\/td><\/tr><tr><td>\nInac\u00adtive\/Invalid User\u00ad Mana\u00adgement\n<\/td><td>\nIndi\u00adrectly enfo\u00adrced thro\u00adugh spam\u00ad rate\u00ad and comp\u00adlaint thre\u00adsholds.\n<\/td><td>\nRec\u00adom\u00adme\u00adnded\n<\/td><\/tr><tr><td>\nFunc\u00adtional Repl\u00ady-To Addr\u00adess\n<\/td><td>\nRec\u00adom\u00adme\u00adnded\n<\/td><td>\nRec\u00adom\u00adme\u00adnded\n<\/td><\/tr><tr><td>\nTran\u00adsparency (Sub\u00adject line\u00ads, head\u00aders)\n<\/td><td>\nReco\u00admmended to avoi\u00add misl\u00adeading info\u00ad.\n<\/td><td>\nReco\u00admmended to avoi\u00add misl\u00adeading info\u00ad.\n<\/td><\/tr><tr><td>\nTime\u00adline for Enfo\u00adrcement\n<\/td><td>\nFull\u00ad enfo\u00adrcement bega\u00adn Febr\u00aduary 2024\u00ad.\n<\/td><td>\nEnfo\u00adrcement begi\u00adns May 5, 2025\u00ad with\u00ad reje\u00adctions at a late\u00adr TBD.\u00ad\n<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<h2 class=\"wp-block-heading\">What to do next<\/h2>\n\n<ul class=\"wp-block-list\">\n<li>Start with a deliverability audit: Confirm that your SPF, DKIM, and DMARC records are correctly implemented and aligned.<\/li>\n\n\n\n<li>Clean your list: Make sure your email lists are validated so you\u2019re not contributing to your spam complaint rate.<\/li>\n<\/ul>\n    <div data-content-type=\"longform\"  class=\"callout text-body-color px-5 py-6 px-md-6 px-lg-7 py-md-7 longform-spacings rounded-lg bg-light\" data-theme=\"light\">\r\n\r\n        <div class=\"content-body\"> View Microsoft\u2019s authentication header <a href=\"https:\/\/support.microsoft.com\/en-us\/office\/view-internet-message-headers-in-outlook-cd039382-dc6e-4264-ac74-c048563d212c\">here.<\/a><\/div>\r\n    <\/div>\r\n\n<p class=\"wp-block-paragraph\">At Mailgun, we\u2019re here to help you navigate changes like these and keep your messages in the inbox where they belong.<\/p>\n\r\n    <aside data-content-type=\"longform\"  class=\"banner-block longform-spacings rounded-lg shadow-lg px-5 py-6 px-md-6 py-md-7 p-lg-7 bg-light\" data-theme=\"dark\" aria-labelledby=\"banner-block-block_593634e7de9a26bab99a4f37fba2dc0f\">\r\n                    <p class=\"text-uppercase section-caption text-body-color\">\r\n                Sign Up            <\/p>\r\n                            <p class=\"h4 text-accent fw-bold\" id=\"banner-block-block_593634e7de9a26bab99a4f37fba2dc0f\">\r\n                It&#8217;s easy to get started. And it&#8217;s free.            <\/p>\r\n                            <div class=\"mb-0 text-body-color\">\r\n                                    <div class=\"content-body mb-0 text-body-color\">See what you can accomplish with the world\u2019s best email delivery platform.<\/div>\r\n                            <\/div>\r\n        \r\n        <div class=\"text-start mt-5\"><a href=\"https:\/\/signup.mailgun.com\/new\/signup\"  class=\"btn btn-secondary\" >Get started<\/a><\/div>\r\n    <\/aside>\r\n\r\n","protected":false},"excerpt":{"rendered":"<p>A Microsoft lan\u00e7ar\u00e1 novos requisitos de autentica\u00e7\u00e3o para remetentes de alto volume a partir de 5 de maio de 2025 \u2014 refletindo a recente restri\u00e7\u00e3o do Gmail e do Yahoo ao e-mail em massa. Se suas mensagens n\u00e3o estiverem alinhadas com SPF, DKIM e DMARC, elas ir\u00e3o para a pasta de spam \u2014 ou coisa pior.<\/p>\n","protected":false},"author":21,"featured_media":4376,"menu_order":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"blog_category":[21],"class_list":["post-21223","blog","type-blog","status-publish","has-post-thumbnail","hentry","blog_category-deliverability"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Requisitos de remetente do Microsoft Outlook 2025: o que saber - Transactional Email API Service For Developers | Mailgun<\/title>\n<meta name=\"description\" content=\"A Microsoft come\u00e7ar\u00e1 a filtrar e-mails em n\u00e3o conformidade em 5 de maio de 2025. 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