{"id":1201,"date":"2010-11-30T14:56:31","date_gmt":"2010-11-30T14:56:31","guid":{"rendered":"http:\/\/www.bodhost.com\/web-hosting\/?p=1201"},"modified":"2026-02-26T14:04:37","modified_gmt":"2026-02-26T14:04:37","slug":"how-to-check-if-smtp-port-25-is-blocked","status":"publish","type":"post","link":"https:\/\/www.bodhost.com\/kb\/how-to-check-if-smtp-port-25-is-blocked\/","title":{"rendered":"How to check if SMTP port 25 is blocked?"},"content":{"rendered":"

The standard port utilized for SMTP connections is 25. One of the most useful causes for not being capable of sending messages is that your Internet service provider blocks this port. This is why utilizing an optional SMTP port is highly recommended.<\/p>\n

Here’s how to, depending on your OS, check whether your ISP blocks port 25:<\/p>\n

Check port 25 in Windows<\/strong><\/p>\n

    \n
  1. Click on the Start menu button (generally present at the lower left corner of the screen)<\/li>\n
  2. Click on the “Run” tab from the menu, Click on it (a new window will pop up).
    \nYou require to type cmd into text field<\/li>\n
  3. Press the “Enter” key Other window will open. It is the so called “MS-DOS prompt” or “command prompt”<\/li>\n
  4. Just type the following command in the command prompt window and press “Enter”: telnet my-domain-name.com 25<\/li>\n<\/ol>\n

    Check port 25 in Mac OS<\/strong><\/p>\n

    Every Mac OS is delivered with a preset up terminal emulator(tool which permit you to execute commands from the command line). Generally, the terminal is present under your Mac HD -> “Applications” directory -> Utilities sub-directory. When the window opens, you will find a command line with a flashing cursor on it so you can start typing right away. Just type the following command and press “Enter”:
    \ntelnet my-domain-name.com 25<\/p>\n

    Check port 25 in Linux<\/strong><\/p>\n

    Open your favorite terminal emulator and execute the following command in order to check the connection on port 25 to your website:
    \ntelnet my-domain-name.com 25<\/p>\n

    Results from the 25 port check<\/strong><\/p>\n

    If the test is successful, you should receive a message similar to this one:
    \n220-serv01.sitegroundXXX.com ESMTP Exim 4.63 #1 Wed, 18 Apr 2008 07:17:30 -0500
    \n220-We do not authorize the use of this system to transport unsolicited,
    \n220 and\/or bulk e-mail.<\/p>\n

    <\/p>\n","protected":false},"excerpt":{"rendered":"

    The standard port utilized for SMTP connections is 25. One of the most useful causes for not being capable of sending messages is that your Internet service provider blocks this…<\/p>\n

    Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[297],"tags":[200,199],"class_list":["post-1201","post","type-post","status-publish","format-standard","hentry","category-faq","tag-smtp","tag-smtp-port"],"yoast_head":"\nHow to check if SMTP port 25 is blocked<\/title>\n<meta name=\"description\" content=\"Verify SMTP port 25 status for email functionality. Use online tools or command-line utilities to check port accessibility, ensuring smooth email communication.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.bodhost.com\/kb\/how-to-check-if-smtp-port-25-is-blocked\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to check if SMTP port 25 is blocked\" \/>\n<meta property=\"og:description\" content=\"Verify SMTP port 25 status for email functionality. Use online tools or command-line utilities to check port accessibility, ensuring smooth email communication.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.bodhost.com\/kb\/how-to-check-if-smtp-port-25-is-blocked\/\" \/>\n<meta property=\"og:site_name\" content=\"Knowledge Base - bodHOST\" \/>\n<meta property=\"article:published_time\" content=\"2010-11-30T14:56:31+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-02-26T14:04:37+00:00\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.bodhost.com\\\/kb\\\/how-to-check-if-smtp-port-25-is-blocked\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.bodhost.com\\\/kb\\\/how-to-check-if-smtp-port-25-is-blocked\\\/\"},\"author\":{\"name\":\"admin\",\"@id\":\"https:\\\/\\\/www.bodhost.com\\\/kb\\\/#\\\/schema\\\/person\\\/c48414ad1536cea20e85282b0737a9f9\"},\"headline\":\"How to check if SMTP port 25 is blocked?\",\"datePublished\":\"2010-11-30T14:56:31+00:00\",\"dateModified\":\"2026-02-26T14:04:37+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.bodhost.com\\\/kb\\\/how-to-check-if-smtp-port-25-is-blocked\\\/\"},\"wordCount\":291,\"publisher\":{\"@id\":\"https:\\\/\\\/www.bodhost.com\\\/kb\\\/#organization\"},\"keywords\":[\"SMTP\",\"SMTP port\"],\"articleSection\":[\"FAQs\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.bodhost.com\\\/kb\\\/how-to-check-if-smtp-port-25-is-blocked\\\/\",\"url\":\"https:\\\/\\\/www.bodhost.com\\\/kb\\\/how-to-check-if-smtp-port-25-is-blocked\\\/\",\"name\":\"How to check if SMTP port 25 is blocked\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.bodhost.com\\\/kb\\\/#website\"},\"datePublished\":\"2010-11-30T14:56:31+00:00\",\"dateModified\":\"2026-02-26T14:04:37+00:00\",\"description\":\"Verify SMTP port 25 status for email functionality. Use online tools or command-line utilities to check port accessibility, ensuring smooth email communication.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.bodhost.com\\\/kb\\\/how-to-check-if-smtp-port-25-is-blocked\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.bodhost.com\\\/kb\\\/how-to-check-if-smtp-port-25-is-blocked\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.bodhost.com\\\/kb\\\/how-to-check-if-smtp-port-25-is-blocked\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"FAQs\",\"item\":\"https:\\\/\\\/www.bodhost.com\\\/kb\\\/category\\\/faq\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"How to check if SMTP port 25 is blocked?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.bodhost.com\\\/kb\\\/#website\",\"url\":\"https:\\\/\\\/www.bodhost.com\\\/kb\\\/\",\"name\":\"Web Hosting Knowledge Base | bodHOST Hosting FAQ\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.bodhost.com\\\/kb\\\/#organization\"},\"alternateName\":\"Web Hosting Knowledge Base | bodHOST Hosting FAQ\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.bodhost.com\\\/kb\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.bodhost.com\\\/kb\\\/#organization\",\"name\":\"Web Hosting Knowledge Base | bodHOST Hosting FAQ\",\"url\":\"https:\\\/\\\/www.bodhost.com\\\/kb\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.bodhost.com\\\/kb\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/www.bodhost.com\\\/kb\\\/wp-content\\\/uploads\\\/2025\\\/10\\\/Profile-Pic.png\",\"contentUrl\":\"https:\\\/\\\/www.bodhost.com\\\/kb\\\/wp-content\\\/uploads\\\/2025\\\/10\\\/Profile-Pic.png\",\"width\":240,\"height\":240,\"caption\":\"Web Hosting Knowledge Base | bodHOST Hosting FAQ\"},\"image\":{\"@id\":\"https:\\\/\\\/www.bodhost.com\\\/kb\\\/#\\\/schema\\\/logo\\\/image\\\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.bodhost.com\\\/kb\\\/#\\\/schema\\\/person\\\/c48414ad1536cea20e85282b0737a9f9\",\"name\":\"admin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/51e53199212db3f59606920448d45a6ead224f904558e3ab9251d071a609b202?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/51e53199212db3f59606920448d45a6ead224f904558e3ab9251d071a609b202?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/51e53199212db3f59606920448d45a6ead224f904558e3ab9251d071a609b202?s=96&d=mm&r=g\",\"caption\":\"admin\"},\"url\":\"https:\\\/\\\/www.bodhost.com\\\/kb\\\/author\\\/admin\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"How to check if SMTP port 25 is blocked","description":"Verify SMTP port 25 status for email functionality. Use online tools or command-line utilities to check port accessibility, ensuring smooth email communication.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.bodhost.com\/kb\/how-to-check-if-smtp-port-25-is-blocked\/","og_locale":"en_US","og_type":"article","og_title":"How to check if SMTP port 25 is blocked","og_description":"Verify SMTP port 25 status for email functionality. Use online tools or command-line utilities to check port accessibility, ensuring smooth email communication.","og_url":"https:\/\/www.bodhost.com\/kb\/how-to-check-if-smtp-port-25-is-blocked\/","og_site_name":"Knowledge Base - bodHOST","article_published_time":"2010-11-30T14:56:31+00:00","article_modified_time":"2026-02-26T14:04:37+00:00","author":"admin","twitter_card":"summary_large_image","twitter_misc":{"Written by":"admin","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.bodhost.com\/kb\/how-to-check-if-smtp-port-25-is-blocked\/#article","isPartOf":{"@id":"https:\/\/www.bodhost.com\/kb\/how-to-check-if-smtp-port-25-is-blocked\/"},"author":{"name":"admin","@id":"https:\/\/www.bodhost.com\/kb\/#\/schema\/person\/c48414ad1536cea20e85282b0737a9f9"},"headline":"How to check if SMTP port 25 is blocked?","datePublished":"2010-11-30T14:56:31+00:00","dateModified":"2026-02-26T14:04:37+00:00","mainEntityOfPage":{"@id":"https:\/\/www.bodhost.com\/kb\/how-to-check-if-smtp-port-25-is-blocked\/"},"wordCount":291,"publisher":{"@id":"https:\/\/www.bodhost.com\/kb\/#organization"},"keywords":["SMTP","SMTP port"],"articleSection":["FAQs"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.bodhost.com\/kb\/how-to-check-if-smtp-port-25-is-blocked\/","url":"https:\/\/www.bodhost.com\/kb\/how-to-check-if-smtp-port-25-is-blocked\/","name":"How to check if SMTP port 25 is blocked","isPartOf":{"@id":"https:\/\/www.bodhost.com\/kb\/#website"},"datePublished":"2010-11-30T14:56:31+00:00","dateModified":"2026-02-26T14:04:37+00:00","description":"Verify SMTP port 25 status for email functionality. Use online tools or command-line utilities to check port accessibility, ensuring smooth email communication.","breadcrumb":{"@id":"https:\/\/www.bodhost.com\/kb\/how-to-check-if-smtp-port-25-is-blocked\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.bodhost.com\/kb\/how-to-check-if-smtp-port-25-is-blocked\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.bodhost.com\/kb\/how-to-check-if-smtp-port-25-is-blocked\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"FAQs","item":"https:\/\/www.bodhost.com\/kb\/category\/faq\/"},{"@type":"ListItem","position":2,"name":"How to check if SMTP port 25 is blocked?"}]},{"@type":"WebSite","@id":"https:\/\/www.bodhost.com\/kb\/#website","url":"https:\/\/www.bodhost.com\/kb\/","name":"Web Hosting Knowledge Base | bodHOST Hosting FAQ","description":"","publisher":{"@id":"https:\/\/www.bodhost.com\/kb\/#organization"},"alternateName":"Web Hosting Knowledge Base | bodHOST Hosting FAQ","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.bodhost.com\/kb\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.bodhost.com\/kb\/#organization","name":"Web Hosting Knowledge Base | bodHOST Hosting FAQ","url":"https:\/\/www.bodhost.com\/kb\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.bodhost.com\/kb\/#\/schema\/logo\/image\/","url":"https:\/\/www.bodhost.com\/kb\/wp-content\/uploads\/2025\/10\/Profile-Pic.png","contentUrl":"https:\/\/www.bodhost.com\/kb\/wp-content\/uploads\/2025\/10\/Profile-Pic.png","width":240,"height":240,"caption":"Web Hosting Knowledge Base | bodHOST Hosting FAQ"},"image":{"@id":"https:\/\/www.bodhost.com\/kb\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/www.bodhost.com\/kb\/#\/schema\/person\/c48414ad1536cea20e85282b0737a9f9","name":"admin","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/51e53199212db3f59606920448d45a6ead224f904558e3ab9251d071a609b202?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/51e53199212db3f59606920448d45a6ead224f904558e3ab9251d071a609b202?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/51e53199212db3f59606920448d45a6ead224f904558e3ab9251d071a609b202?s=96&d=mm&r=g","caption":"admin"},"url":"https:\/\/www.bodhost.com\/kb\/author\/admin\/"}]}},"_links":{"self":[{"href":"https:\/\/www.bodhost.com\/kb\/wp-json\/wp\/v2\/posts\/1201","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bodhost.com\/kb\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bodhost.com\/kb\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bodhost.com\/kb\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bodhost.com\/kb\/wp-json\/wp\/v2\/comments?post=1201"}],"version-history":[{"count":6,"href":"https:\/\/www.bodhost.com\/kb\/wp-json\/wp\/v2\/posts\/1201\/revisions"}],"predecessor-version":[{"id":12462,"href":"https:\/\/www.bodhost.com\/kb\/wp-json\/wp\/v2\/posts\/1201\/revisions\/12462"}],"wp:attachment":[{"href":"https:\/\/www.bodhost.com\/kb\/wp-json\/wp\/v2\/media?parent=1201"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bodhost.com\/kb\/wp-json\/wp\/v2\/categories?post=1201"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bodhost.com\/kb\/wp-json\/wp\/v2\/tags?post=1201"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}