{"id":235,"date":"2025-01-24T16:24:10","date_gmt":"2025-01-24T16:24:10","guid":{"rendered":"https:\/\/alavps.com\/blog\/?p=235"},"modified":"2025-01-24T16:24:10","modified_gmt":"2025-01-24T16:24:10","slug":"use-smtp-ports-25-465-587","status":"publish","type":"post","link":"https:\/\/alavps.com\/blog\/use-smtp-ports-25-465-587\/","title":{"rendered":"How To Use SMTP Ports: 25, 465, and 587"},"content":{"rendered":"<div id=\"bsf_rt_marker\"><\/div><p data-pm-slice=\"1 1 []\">Have you\u2002ever thought about how your email gets from your computer to another? Well, that\u2019s when SMTP takes the stage. SMTP means \u201cSimple Mail Transfer Protocol,\u201d and it\u2019s the structure that guides the sending and delivery\u2002of emails. But to get there, it\u2002employs various \u201cports\u201d \u2014 like different highways or paths.<\/p>\n<p>This article will discuss threekey ports for sending emails:<strong> Port 25, Port 465, and Port 587<\/strong>. You\u2019ll\u2002learn why and when they matter you should use each one, so you can avoid problems with sending your emails.<\/p>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"What_is_SMTP_and_Why_Should_You_Care\"><\/span><strong>What is SMTP and Why Should You Care?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-69f313fa470ab\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" 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: #999;color:#999\" 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><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-69f313fa470ab\"  aria-label=\"Toggle\" \/><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:\/\/alavps.com\/blog\/use-smtp-ports-25-465-587\/#What_is_SMTP_and_Why_Should_You_Care\" >What is SMTP and Why Should You Care?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/alavps.com\/blog\/use-smtp-ports-25-465-587\/#The_3_Most_Important_SMTP_Ports_25_465_and_587\" >The 3 Most Important SMTP Ports: 25, 465, and 587<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/alavps.com\/blog\/use-smtp-ports-25-465-587\/#Port_465_%E2%80%93_The_SSL-secured_Route_But_a_Little_Outdated\" >Port 465 \u2013 The SSL-secured Route (But a Little Outdated)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/alavps.com\/blog\/use-smtp-ports-25-465-587\/#Port_587_%E2%80%93_The_Modern_Secure_Choice\" >Port 587 \u2013 The Modern, Secure Choice<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/alavps.com\/blog\/use-smtp-ports-25-465-587\/#Why_Do_Email_Providers_Have_Different_Ports\" >Why Do Email Providers Have Different Ports?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/alavps.com\/blog\/use-smtp-ports-25-465-587\/#Common_Issues_with_SMTP_Ports_and_How_to_Fix_Them\" >Common Issues with SMTP Ports and How to Fix Them<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/alavps.com\/blog\/use-smtp-ports-25-465-587\/#1_Blocked_Ports\" >1. Blocked Ports<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/alavps.com\/blog\/use-smtp-ports-25-465-587\/#2_Incorrect_Settings\" >2. Incorrect Settings<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/alavps.com\/blog\/use-smtp-ports-25-465-587\/#3_SSLTLS_Errors\" >3. SSL\/TLS Errors<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/alavps.com\/blog\/use-smtp-ports-25-465-587\/#SMTP_Port_FAQ\" >SMTP Port FAQ<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/alavps.com\/blog\/use-smtp-ports-25-465-587\/#1_Which_SMTP_port_should_I_use\" >1. Which SMTP port should I use?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/alavps.com\/blog\/use-smtp-ports-25-465-587\/#2_Why_is_Port_25_blocked\" >2. Why is Port 25 blocked?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/alavps.com\/blog\/use-smtp-ports-25-465-587\/#3_How_do_I_change_my_SMTP_port\" >3. How do I change my SMTP port?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/alavps.com\/blog\/use-smtp-ports-25-465-587\/#4_Is_Port_465_still_secure\" >4. Is Port 465 still secure?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/alavps.com\/blog\/use-smtp-ports-25-465-587\/#5_Whats_the_difference_between_Port_465_and_Port_587\" >5. What\u2019s the difference between Port 465 and Port 587?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/alavps.com\/blog\/use-smtp-ports-25-465-587\/#Conclusion\" >Conclusion<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n\n<p>When you send an email, the data needs to travel from your device (like a phone or computer) to the email server, then on to the person you\u2019re emailing. This process uses a protocol called <strong>SMTP<\/strong>.<\/p>\n<p>Now, SMTP needs specific &#8220;ports&#8221; to get things from point A to point B. Think of SMTP as a mailman, and the ports are like different routes the mailman can take. Some routes are faster or safer than others, and choosing the right one helps your email get delivered correctly.<\/p>\n<p><img decoding=\"async\" class=\"wp-image-236 aligncenter lazyload\" data-src=\"https:\/\/alavps.com\/blog\/wp-content\/uploads\/2025\/01\/how-smpt-works.jpg\" alt=\"\" width=\"720\" height=\"720\" data-srcset=\"https:\/\/alavps.com\/blog\/wp-content\/uploads\/2025\/01\/how-smpt-works.jpg 1024w, https:\/\/alavps.com\/blog\/wp-content\/uploads\/2025\/01\/how-smpt-works-300x300.jpg 300w, https:\/\/alavps.com\/blog\/wp-content\/uploads\/2025\/01\/how-smpt-works-150x150.jpg 150w, https:\/\/alavps.com\/blog\/wp-content\/uploads\/2025\/01\/how-smpt-works-768x768.jpg 768w\" data-sizes=\"(max-width: 720px) 100vw, 720px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 720px; --smush-placeholder-aspect-ratio: 720\/720;\" \/><\/p>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"The_3_Most_Important_SMTP_Ports_25_465_and_587\"><\/span><strong>The 3 Most Important SMTP Ports: 25, 465, and 587<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>Port 25 \u2013 The Old Highway (But Not Recommended)<\/strong><\/p>\n<p>Port 25 is the original route for SMTP. It\u2019s the classic path that email servers used for sending messages. However, because of all the <strong>spam<\/strong> (unwanted junk email) that used this port, many internet providers <strong>block<\/strong> Port 25.<\/p>\n<p><strong>When is Port 25 Used?<\/strong><\/p>\n<ul>\n<li><strong>Server to server communication:<\/strong> This means it\u2019s mostly used between email servers (not for regular users).<\/li>\n<li>It doesn\u2019t offer encryption, which means the data can be seen by others while it travels (not great for security).<\/li>\n<\/ul>\n<p><strong>Why Port 25 Is Not Ideal:<\/strong><\/p>\n<ul>\n<li>Many ISPs block it to stop spam.<\/li>\n<li>It doesn\u2019t have any encryption, so it\u2019s not the most secure.<\/li>\n<\/ul>\n<p><strong>Also Read: <\/strong><a href=\"https:\/\/alavps.com\/blog\/localhost8888\/\" rel=\"bookmark\" data-wpel-link=\"internal\"><strong>Localhost:8888 \u2013 What Is It for WordPress?<\/strong><\/a><\/p>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"Port_465_%E2%80%93_The_SSL-secured_Route_But_a_Little_Outdated\"><\/span><strong>Port 465 \u2013 The SSL-secured Route (But a Little Outdated)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Port 465 was created to be more secure by using <strong>SSL<\/strong> (Secure Sockets Layer). This means it encrypts (or scrambles) the information so no one can see your email content as it travels.<\/p>\n<p><strong>When is Port 465 Used?<\/strong><\/p>\n<ul>\n<li>It was originally used to make sure email connections were <strong>secure<\/strong> using SSL encryption.<\/li>\n<li>Some older email systems and clients still use Port 465, but it\u2019s <strong>not the most popular option<\/strong> anymore.<\/li>\n<\/ul>\n<p><strong>Why Port 465 Is Not Perfect:<\/strong><\/p>\n<ul>\n<li>It\u2019s outdated and no longer widely used.<\/li>\n<li>There are newer, more efficient methods for encrypting email data (like Port 587).<\/li>\n<\/ul>\n<p><img decoding=\"async\" class=\"wp-image-237 aligncenter lazyload\" data-src=\"https:\/\/alavps.com\/blog\/wp-content\/uploads\/2025\/01\/which-port-should-i-use.png\" alt=\"\" width=\"757\" height=\"411\" data-srcset=\"https:\/\/alavps.com\/blog\/wp-content\/uploads\/2025\/01\/which-port-should-i-use.png 956w, https:\/\/alavps.com\/blog\/wp-content\/uploads\/2025\/01\/which-port-should-i-use-300x163.png 300w, https:\/\/alavps.com\/blog\/wp-content\/uploads\/2025\/01\/which-port-should-i-use-768x417.png 768w\" data-sizes=\"(max-width: 757px) 100vw, 757px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 757px; --smush-placeholder-aspect-ratio: 757\/411;\" \/><\/p>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"Port_587_%E2%80%93_The_Modern_Secure_Choice\"><\/span><strong>Port 587 \u2013 The Modern, Secure Choice<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Port 587 is the newest and most <strong>secure<\/strong> option for sending emails. It uses <strong>TLS<\/strong> (Transport Layer Security) to encrypt emails, making it a great choice if you want your email to travel safely and securely. <strong>Most email providers recommend this port<\/strong>, and it works with most email clients, like Gmail, Outlook, or Thunderbird.<\/p>\n<p><strong>When is Port 587 Used?<\/strong><\/p>\n<ul>\n<li>It\u2019s used for sending email with <strong>TLS encryption<\/strong>.<\/li>\n<li>It\u2019s the recommended port for modern email communication.<\/li>\n<li>You should use this for sending outgoing emails in most cases.<\/li>\n<\/ul>\n<p><strong>Why Port 587 Is the Best:<\/strong><\/p>\n<ul>\n<li>It provides encryption with <strong>TLS<\/strong>, so your emails are secure.<\/li>\n<li>It\u2019s supported by <strong>almost all email clients<\/strong>.<\/li>\n<li>It\u2019s the <strong>most recommended<\/strong> option for email security and delivery.<\/li>\n<\/ul>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"Why_Do_Email_Providers_Have_Different_Ports\"><\/span><strong>Why Do Email Providers Have Different Ports?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>You might wonder why there are different ports for sending email in the first place. The reason is simple: <strong>Security and Compatibility<\/strong>.<\/p>\n<ul>\n<li><strong>Port 25<\/strong> was the first, but it\u2019s too old and not safe enough for modern email use.<\/li>\n<li><strong>Port 465<\/strong> was made to add encryption, but it\u2019s not as commonly used today.<\/li>\n<li><strong>Port 587<\/strong> is the current favorite because it offers strong security and is supported by most email services.<\/li>\n<\/ul>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"Common_Issues_with_SMTP_Ports_and_How_to_Fix_Them\"><\/span><strong>Common Issues with SMTP Ports and How to Fix Them<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"1_Blocked_Ports\"><\/span><strong>1. Blocked Ports<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>If your ISP (Internet Service Provider) blocks Port 25, you won\u2019t be able to send email using it. The fix? Use <strong>Port 587<\/strong> instead. It\u2019s open and works just fine.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2_Incorrect_Settings\"><\/span><strong>2. Incorrect Settings<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Sometimes, your email client (like Outlook) might have the wrong port set up, which can cause problems. Make sure you&#8217;re using the right port for your email provider \u2014 <strong>Port 587<\/strong> is usually the best option.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3_SSLTLS_Errors\"><\/span><strong>3. SSL\/TLS Errors<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>If you\u2019re using Port 465 and run into issues with SSL\/TLS certificates (basically digital \u201cID cards\u201d for websites), it might be time to switch to Port 587, which handles encryption more smoothly.<\/p>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"SMTP_Port_FAQ\"><\/span><strong>SMTP Port FAQ<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"1_Which_SMTP_port_should_I_use\"><\/span><strong>1. Which SMTP port should I use?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>Port 587<\/strong> is the best option for most people because it\u2019s secure and supported by almost all email services.<\/li>\n<li>Use <strong>Port 465<\/strong> if you need SSL encryption, but it\u2019s outdated.<\/li>\n<li><strong>Port 25<\/strong> is mostly blocked, so avoid it for regular email use.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"2_Why_is_Port_25_blocked\"><\/span><strong>2. Why is Port 25 blocked?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Port 25 is often blocked by ISPs because it\u2019s commonly used for sending <strong>spam<\/strong>. It&#8217;s also not encrypted, which makes it easier for hackers to intercept.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3_How_do_I_change_my_SMTP_port\"><\/span><strong>3. How do I change my SMTP port?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>You can change your SMTP port in your email client\u2019s settings (like Gmail, Outlook, etc.). Go to your <strong>outgoing server settings<\/strong> and choose <strong>Port 587<\/strong> for secure sending.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"4_Is_Port_465_still_secure\"><\/span><strong>4. Is Port 465 still secure?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Port 465 used to be a secure option, but it\u2019s now considered outdated. It\u2019s better to use <strong>Port 587<\/strong>, which supports modern security protocols.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"5_Whats_the_difference_between_Port_465_and_Port_587\"><\/span><strong>5. What\u2019s the difference between Port 465 and Port 587?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Port 465 was created for <strong>SSL encryption<\/strong>, but <strong>Port 587<\/strong> uses <strong>TLS encryption<\/strong>, which is more widely supported and recommended for secure email communication today.<\/p>\n<hr \/>\n<h3><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span><strong>Conclusion<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Now you know the difference between the three main SMTP ports: <strong>Port 25<\/strong>, <strong>Port 465<\/strong>, and <strong>Port 587<\/strong>. While Port 25 is old and blocked by many ISPs, and Port 465 is becoming less common, Port 587 is the best choice for sending secure emails today.<\/p>\n<p>Make sure to check your email client settings to use the right port, especially <strong>Port 587<\/strong> for a secure and smooth email experience. By using the right port, your emails will be less likely to get stuck or lost, and you\u2019ll have better protection against hackers.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Have you\u2002ever thought about how your email gets from your computer to another? Well, that\u2019s when SMTP takes the stage. SMTP means \u201cSimple Mail Transfer Protocol,\u201d and it\u2019s the structure that guides the sending and delivery\u2002of emails. But to get there, it\u2002employs various \u201cports\u201d \u2014 like different highways or paths. This article will discuss threekey [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":236,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[11],"tags":[],"class_list":["post-235","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-how-tos"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How To Use SMTP Ports: 25, 465, and 587<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/alavps.com\/blog\/use-smtp-ports-25-465-587\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How To Use SMTP Ports: 25, 465, and 587\" \/>\n<meta property=\"og:description\" content=\"Have you\u2002ever thought about how your email gets from your computer to another? Well, that\u2019s when SMTP takes the stage. SMTP means \u201cSimple Mail Transfer Protocol,\u201d and it\u2019s the structure that guides the sending and delivery\u2002of emails. But to get there, it\u2002employs various \u201cports\u201d \u2014 like different highways or paths. 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