{"id":22628,"date":"2024-11-20T00:00:00","date_gmt":"2024-11-20T00:00:00","guid":{"rendered":"https:\/\/www.mailgun.com\/blog\/filtros-de-spam-de-buzones\/"},"modified":"2026-09-15T23:51:49","modified_gmt":"2026-09-15T23:51:49","slug":"filtros-de-spam-de-buzones","status":"publish","type":"blog","link":"https:\/\/www.mailgun.com\/es\/blog\/deliverability\/filtros-de-spam-de-buzones\/","title":{"rendered":"Filtros de spam &amp; entregabilidad: qu\u00e9 esperan de los remitentes los proveedores de servicios de email"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Spam is everywhere. Literally.<\/p>\n\n<p class=\"wp-block-paragraph\">You\u2019ve probably noticed this yourself, just by looking through your inbox, but what actually gets through to you is <b>a minimal fraction of what gets sent<\/b> every day. Mailbox providers see a colossal amount of spam \u2013 or worse, fraudulent or phishing \u2013 emails coming their way. These e<!-- -->mail spam filters often feel like obstacles for legitimate senders trying to reach their subscribers. <\/p>\n\n<p class=\"wp-block-paragraph\">But what if we told you spam filters are actually your allies in maintaining email as a trusted communication channel?<\/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-1352\"><p class=\"h5 m-0\" id=\"toc-title-1352\">\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=\"#why-do-mailbox-providers-use-spam-filters\">Why do mailbox providers use spam filters?<\/a><a class=\"scrollme link-body-color\" href=\"#spam-filters-serve-multiple-critical-functions\">Spam filters serve multiple critical functions<\/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-mailbox-providers-expect-from-you\">What mailbox providers expect from you<\/a><a class=\"scrollme link-body-color\" href=\"#aim-for-a-positive-audience-response\">Aim for a positive audience response<\/a><a class=\"scrollme link-body-color\" href=\"#embrace-authentication\">Embrace authentication\u00a0<\/a><a class=\"scrollme link-body-color\" href=\"#be-consistent\">Be consistent<\/a><a class=\"scrollme link-body-color\" href=\"#do-your-due-diligence-with-your-lists\">Do your due diligence with your lists<\/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=\"#conclusion\">Conclusion<\/a><\/div><\/div><\/nav>\n<h2 class=\"wp-block-heading\">Why do mailbox providers use spam filters?<\/h2>\n\n<p class=\"wp-block-paragraph\">Every day, <a href=\"https:\/\/cloud.google.com\/blog\/products\/identity-security\/protecting-against-cyber-threats-during-covid-19-and-beyond\" target=\"_tabs\" rel=\"noopener noreferrer\"><u>Gmail<\/u><\/a> alone blocks more than one hundred million phishing emails that try to steal information or money from Gmail users. <\/p>\n\n<p class=\"wp-block-paragraph\">According to email expert LB Blair, \u00ab91% of all hacking attempts are initiated via email.\u00bb This staggering statistic demonstrates why robust spam filtering is critical for protecting users.<\/p>\n\n<p class=\"wp-block-paragraph\">Without these protections, email could become as unreliable as phone calls have become &#8211; where people ignore unknown numbers due to poor spam filtering. Gmail reports blocking 99.9% of spam, phishing, and malware from reaching inboxes.<\/p>\n\t<div class=\"custom-video\">\r\n\t\t\t\t\t                    <div class=\"iframe-responsive-container lazy-video rounded-lg overflow-hidden \">\r\n                <a href=\"https:\/\/www.youtube.com\/watch?v=eftJN4CfbuE\" class=\"lazy-video-link\" data-lazy-video=\"eftJN4CfbuE\" target=\"_blank\" rel=\"nofollow\" role=\"button\" data-source=\"youtube\" data-language=\"es\" data-thumb=\"https:\/\/img.youtube.com\/vi\/eftJN4CfbuE\/maxresdefault.jpg\" title=\"V\u00eddeo de Sinch\">\r\n                    <div class=\"btn btn-light btn-light-social btn-play btn-play-circle\">\r\n                                                    <svg aria-hidden=\"true\" data-url=\"https:\/\/www.mailgun.com\/wp-content\/plugins\/sinch-core\/assets\/icons\/sinch\/play.svg\"><\/svg>\r\n                                            <\/div>\r\n                    <img decoding=\"async\"  src=\"https:\/\/img.youtube.com\/vi\/eftJN4CfbuE\/maxresdefault.jpg\" alt=\"Email marketing and spam filtering vs. scammers and spammers | Email Camp 2024\">\r\n                <\/a>\r\n            <\/div>\r\n                        <script type=\"application\/ld+json\">\r\n            {\n    \"@context\": \"http:\/\/schema.org\",\n    \"@type\": \"VideoObject\",\n    \"@id\": \"https:\/\/www.youtube.com\/watch?v=eftJN4CfbuE#VideoObject\",\n    \"thumbnailUrl\": \"https:\/\/img.youtube.com\/vi\/eftJN4CfbuE\/maxresdefault.jpg\",\n    \"embedUrl\": \"https:\/\/www.youtube.com\/embed\/eftJN4CfbuE\",\n    \"contentUrl\": \"https:\/\/www.youtube.com\/watch?v=eftJN4CfbuE\",\n    \"name\": \"Email marketing and spam filtering vs. scammers and spammers | Email Camp 2024\",\n    \"description\": \"Discover how spam filters are actually saving us in this session by LB Blair, Chief Strategy Officer at Email Industries. \\n\\nYou'll learn how to:\\n\\u2705 Improve your email deliverability\\n\\u2705 Work with spam filters\\n\\u2705 Stay ahead of scammers and spammers\\n\\u2705 Maintain the integrity of email as a communication channel\\n\\nHighlights:\\n\\ud83d\\udcbb Spammers and scammers are trying to maximize financial gains with minimal effort. They exploit human emotion and target sensitive information, utilizing various tactics like phishing, pretexting, and spreading malware.\\n\\ud83d\\udee1\\ufe0f Spam filters act as a critical defense mechanism, protecting users and businesses from malicious activity. They analyze vast amounts of data, including domain reputation, content analysis, and user engagement, to identify and block suspicious emails.\\n\\ud83d\\ude80 Understanding and working with spam filters is essential for successful email marketing. This involves maintaining a healthy domain reputation, sending legitimate content, and utilizing authentication protocols.\\n\\ud83d\\udcca False positives can occur, but there are ways to troubleshoot them. By gathering data, assessing the situation, and taking remedial action, marketers can improve deliverability and ensure their emails reach the intended audience.\\n\\ud83e\\udd1d Spam filters and email marketers are on the same team. They share the goal of ensuring a safe and reliable email experience for everyone, fostering trust in the email channel.\\n\\nThis session is from Day 1 of Email Camp 2024: MessageMania. Check out the rest of the sessions: https:\/\/www.youtube.com\/playlist?list=PL0BaQoZdfN0L-kpbrimuyTUjqZMeNMIwC\\n\\nDon't miss out Email Camp 2025\\nWant to be the first to know about all the sessions and speakers?\\nSign up and get Email Camp 2025 updates straight to your inbox: https:\/\/hello.mailjet.com\/email-camp-save-the-date\/\\n\\n#EmailCamp #emailmarketing #emaildeliverability\",\n    \"uploadDate\": \"2024-09-30T17:30:06+00:00\",\n    \"duration\": \"PT29M27S\"\n}        <\/script>\r\n        \t\t\r\n\t\t\t<\/div>\r\n\r\n\t\r\n\n<p class=\"wp-block-paragraph\">No matter the actual volume of phishing or spam emails that the mailbox providers are receiving, what we can be certain of is\u00a0 that it is their responsibility to protect their users against those unwanted (and sometimes dangerous) emails. <\/p>\n\n<h3 class=\"wp-block-heading\">Spam filters serve multiple critical functions<\/h3>\n\n<p class=\"wp-block-paragraph\">It can be easy to be frustrated by spam filters, but they do perform some important functions.<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Protecting users from financial scams and data theft<\/li>\n\n\n\n<li>Preventing malware and ransomware distribution<\/li>\n\n\n\n<li>Maintaining email as a reliable communication channel<\/li>\n\n\n\n<li>Preserving email&#8217;s role as a searchable, archival system<\/li>\n\n\n\n<li>Enabling secure delivery of time-sensitive information<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\">What mailbox providers expect from you<\/h2>\n\n<p class=\"wp-block-paragraph\">You&#8217;re probably thinking the above doesn\u2019t matter to you. You\u2019re not a spammer, and you\u2019re certainly not a fraudster. Your emails are legitimately sent to your customers or subscribers. And more importantly, they bring value to your audience. <\/p>\n\n<p class=\"wp-block-paragraph\">However, modern spam filters use sophisticated analysis across multiple data points to make decisions about email delivery. Here are some of the key categories they look at, and the individual points you can monitor or influence within your email program.<\/p>\n\n<p class=\"wp-block-paragraph\"><b>Infrastructure Analysis:<\/b><\/p>\n\n<ul class=\"wp-block-list\">\n<li>Domain age and reputation<\/li>\n\n\n\n<li>DNS configuration and hosting<\/li>\n\n\n\n<li>Authentication protocols (SPF, DKIM, DMARC)<\/li>\n\n\n\n<li>Sending patterns and volume consistency<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\"><b>Engagement Metrics:<\/b><\/p>\n\n<ul class=\"wp-block-list\">\n<li>Open and click rates<\/li>\n\n\n\n<li>Time spent reading messages<\/li>\n\n\n\n<li>Spam complaints and unsubscribes<\/li>\n\n\n\n<li>User-specific engagement history<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\"><b>Content Evaluation:<\/b><\/p>\n\n<ul class=\"wp-block-list\">\n<li>Message fingerprinting and pattern matching<\/li>\n\n\n\n<li>Links to known malicious sites<\/li>\n\n\n\n<li>Attachment analysis<\/li>\n\n\n\n<li>Similarity to known spam content <\/li>\n<\/ul>\n\n<h3 class=\"wp-block-heading\">Aim for a positive audience response<\/h3>\n\n<p class=\"wp-block-paragraph\">There are many factors that come into play when we\u2019re talking about email deliverability. But if there\u2019s one that is very important, it\u2019s how your audience reacts to your emails.\u00a0<\/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-692105bf7b4d8a59758bde1299911ddc\">\r\n            \u00abEngagement is your lifeline to reputation as a sender.\u00bb        <\/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\/07\/lb-blair_headshot.png\" alt=\"Foto de LB Blair\">\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-692105bf7b4d8a59758bde1299911ddc\">\r\n                        LB Blair                    <\/cite>\r\n                                    <\/div>\r\n            <\/div>\r\n            <\/div>\r\n\n<p class=\"wp-block-paragraph\"><b>Mailbox providers prioritize delivering emails their users want to receive.<\/b> <\/p>\n\n<h3 class=\"wp-block-heading\">Embrace authentication\u00a0<\/h3>\n\n<p class=\"wp-block-paragraph\">If there is one topic in the email service industry that pretty much everyone agrees on: <a href=\"https:\/\/www.mailgun.com\/es\/blog\/deliverability\/entender-dkim-como-funciona\/\" target=\"_tabs\" rel=\"noopener noreferrer\"><u><b>authentication is not optional<\/b><\/u><\/a>\u00a0<\/p>\n\n<p class=\"wp-block-paragraph\">Email authentication is the way to confirm to mailbox providers that you are who you say you are, and that your emails haven\u2019t been tampered with in transit to your recipient mailboxes. In this day and age, it\u2019s just good manners, really. It doesn\u2019t take a long time to configure your SPF and DKIM records, and it shows that you know your basics in terms of email good practices. On top of that, it makes your email traffic more legitimate.\u00a0<\/p>\n\n<p class=\"wp-block-paragraph\">Plus, authenticating your emails properly will be a great first step to adding a <a href=\"https:\/\/www.mailjet.com\/blog\/deliverability\/some-words-about-dmarc\/\" target=\"_tabs\" rel=\"noopener noreferrer\"><u>DMARC policy<\/u><\/a> on your sending domain, and maybe even a <a href=\"https:\/\/media.emailonacid.com\/wp-content\/uploads\/2021\/08\/Path-to-BIMI-ebook.pdf\" target=\"_tabs\" rel=\"noopener noreferrer\"><u>BIMI record<\/u><\/a>.<\/p>\n\n<h3 class=\"wp-block-heading\">Be consistent<\/h3>\n\n<p class=\"wp-block-paragraph\">This one is probably hard to grasp, but it\u2019s very relevant when it comes to the email traffic the mailbox providers are receiving every day. <\/p>\n\n<p class=\"wp-block-paragraph\"><b>Consistency in sending patterns helps spam filters understand your normal behavior.<\/b> Sudden changes in volume or frequency can trigger suspicion since that&#8217;s often associated with compromised accounts.<\/p>\n\n<p class=\"wp-block-paragraph\">It doesn&#8217;t matter if you&#8217;re sending every single day, or every week, or two times a month. Because such sends are predictable from the internet service providers&#8217; perspective. \u00abLook, they&#8217;ve sent those past four campaigns once a week in the last month. We can expect the fifth one next week.\u00bb<\/p>\n\n<h3 class=\"wp-block-heading\">Do your due diligence with your lists<\/h3>\n\n<p class=\"wp-block-paragraph\">It was a best practice in the past, and it still is right now. Don\u2019t send emails to invalid addresses. It\u2019s that easy.<\/p>\n\n<p class=\"wp-block-paragraph\"><b>When your emails get flagged as spam, follow these three steps:<\/b><\/p>\n\n<p class=\"wp-block-paragraph\"><b>1. Collect Data<\/b><\/p>\n\n<ul class=\"wp-block-list\">\n<li>Check Google Postmaster Tools<\/li>\n\n\n\n<li>Review bounce logs<\/li>\n\n\n\n<li>Analyze engagement metrics<\/li>\n\n\n\n<li>Monitor blocklist status<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\"><b>2. Assess Root Causes<\/b><\/p>\n\n<ul class=\"wp-block-list\">\n<li>Identify affected mailbox providers<\/li>\n\n\n\n<li>Review recent sending pattern changes<\/li>\n\n\n\n<li>Check authentication status<\/li>\n\n\n\n<li>Evaluate content changes<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\"><b>3. Implement Solutions<\/b><\/p>\n\n<ul class=\"wp-block-list\">\n<li>Fix technical issues<\/li>\n\n\n\n<li>Adjust content if needed<\/li>\n\n\n\n<li>Update authentication if required<\/li>\n\n\n\n<li>Contact postmaster support if necessary<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Using <a href=\"\/products\/inbox\/email-verification\/\" target=\"_tabs\" rel=\"noopener noreferrer\"><u>email validation software<\/u><\/a>, or simply adding a double opt-in process to your newsletter flow, will prevent your lists from collecting invalid addresses.<\/p>\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n<p class=\"wp-block-paragraph\">In the wise words of LB Blair, spam filters might seem like our opponents, but really they&#8217;re the immune system protecting email. When you align your sending practices with spam filter expectations, everyone wins.<\/p>\n\n<p class=\"wp-block-paragraph\">Now you know: There are a lot of factors to consider when it comes to email deliverability. We&#8217;d love to have a quick answer to everyone&#8217;s favorite question &#8211; <i>How do I make sure my legitimate email doesn&#8217;t land in the spam folder?<\/i> &#8211; but the truth is&#8230; <b>deliverability is complicated<\/b>. By understanding and working with spam filters rather than trying to bypass them, legitimate senders can achieve better deliverability while helping maintain email as a trusted channel for everyone.<\/p>\n\n<p class=\"wp-block-paragraph\"><i>Want to learn more about email deliverability and how you can optimize your sending? <\/i><a href=\"https:\/\/www.mailgun.com\/es\/blog\/\" target=\"_tabs\" rel=\"noopener noreferrer\"><u><i>Subscribe to our newsletter<\/i><\/u><\/a><i> for the latest and greatest in all things email.<\/i><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u00bfC\u00f3mo puedes aplicar las mejores pr\u00e1cticas de env\u00edo para ganarte el favor de los filtros de spam de los proveedores de servicios de email y llegar a la bandeja de entrada?<\/p>\n","protected":false},"author":42,"featured_media":4376,"menu_order":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"blog_category":[21],"class_list":["post-22628","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 - 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