{"id":63299,"date":"2025-12-05T10:59:41","date_gmt":"2025-12-05T03:59:41","guid":{"rendered":"https:\/\/vhost.vn\/email-anti-spam-policy\/"},"modified":"2026-05-20T14:39:00","modified_gmt":"2026-05-20T07:39:00","slug":"email-anti-spam-policy","status":"publish","type":"post","link":"https:\/\/vhost.vn\/en\/email-anti-spam-policy\/","title":{"rendered":"Email Anti Spam Policy"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Dear Valued Customers,<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-74a37bae\"><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><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><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/vhost.vn\/en\/email-anti-spam-policy\/#Current_Situation\" >Current Situation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/vhost.vn\/en\/email-anti-spam-policy\/#Spam_Listing_Regulations_by_Global_Organizations\" >Spam Listing Regulations by Global Organizations<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/vhost.vn\/en\/email-anti-spam-policy\/#Anti-Spam_Policy_at_vHost\" >Anti-Spam Policy at vHost<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/vhost.vn\/en\/email-anti-spam-policy\/#Requests_to_Unblock_Outbound_Email_via_SMTP\" >Requests to Unblock Outbound Email via SMTP<\/a><ul class='ez-toc-list-level-5' ><li class='ez-toc-heading-level-5'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/vhost.vn\/en\/email-anti-spam-policy\/#For_Domestic_Customers_Vietnam\" >For Domestic Customers (Vietnam)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-5'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/vhost.vn\/en\/email-anti-spam-policy\/#For_International_Customers\" >For International Customers<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h4 class=\"uagb-heading-text\"><span class=\"ez-toc-section\" id=\"Current_Situation\"><\/span>Current Situation<span class=\"ez-toc-section-end\"><\/span><\/h4><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Recently, the lenient filtering and open-port configurations for email transmission on servers hosted at vHost have led to certain customers exploiting the system to send unsolicited spam emails. This uncontrolled activity has negatively impacted and compromised the reputation of all other IP addresses under vHost&#8217;s management.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">vHost is a Hosting and Cloud service provider holding ASN 56160, delegated by the Ministry of Information and Communications (MIC) \/ Vietnam Internet Network Information Center (VNNIC).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As illustrated in the example below:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Level 1: IP 103.27.60.2 is clean and not listed on any spam database.<\/li>\n\n\n\n<li>Level 2: The \/24 IP range (103.27.60.0\/24) is clean and not blocklisted.<\/li>\n\n\n\n<li>Level 3: Blocklisted because more than 50 IPs belonging to the provider owning ASN 56150 have been reported and listed as spam IPs.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"<!--[CDATA[https:\/\/vhost.vn\/wp-content\/uploads\/2025\/12\/chinh-sach-phong-chong-spam-email.png]]--&gt;\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"470\" src=\"https:\/\/vhost.vn\/wp-content\/uploads\/2025\/12\/chinh-sach-phong-chong-spam-email-1024x470.png\" alt=\"\" class=\"wp-image-60236\" srcset=\"https:\/\/vhost.vn\/wp-content\/uploads\/2025\/12\/chinh-sach-phong-chong-spam-email-1024x470.png 1024w, https:\/\/vhost.vn\/wp-content\/uploads\/2025\/12\/chinh-sach-phong-chong-spam-email-300x138.png 300w, https:\/\/vhost.vn\/wp-content\/uploads\/2025\/12\/chinh-sach-phong-chong-spam-email-768x353.png 768w, https:\/\/vhost.vn\/wp-content\/uploads\/2025\/12\/chinh-sach-phong-chong-spam-email-1536x705.png 1536w, https:\/\/vhost.vn\/wp-content\/uploads\/2025\/12\/chinh-sach-phong-chong-spam-email.png 1841w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-4f584f0e\"><h4 class=\"uagb-heading-text\"><span class=\"ez-toc-section\" id=\"Spam_Listing_Regulations_by_Global_Organizations\"><\/span>Spam Listing Regulations by Global Organizations<span class=\"ez-toc-section-end\"><\/span><\/h4><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">According to global network security standards, IP addresses are blocklisted across 3 progressive levels:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Level 1 (Single IP): Only the specific offending IP address is listed.<\/li>\n\n\n\n<li>Level 2 (Class \/24 Block): The entire \/24 subnet (consisting of 256 IPs) is listed. Even if you do not directly send spam, your IP will be affected if other IPs within the same network range are reported. <\/li>\n\n\n\n<li>Level 3 (Autonomous System Number &#8211; ASN): All IP addresses registered under that corporate ASN are entirely blocklisted.<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-7fed4ac0\"><h4 class=\"uagb-heading-text\"><span class=\"ez-toc-section\" id=\"Anti-Spam_Policy_at_vHost\"><\/span>Anti-Spam Policy at vHost<span class=\"ez-toc-section-end\"><\/span><\/h4><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">To prevent any negative impact on vHost&#8217;s active infrastructure and to safeguard the email delivery services we provide to numerous domestic and international corporate clients, vHost will enforce a strict email blocking policy.<br>vHost will block all outbound email transmissions across all vHost servers, with the sole exception of dedicated Email Services built, managed, and administered directly by vHost for our customers. <\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-02106785\"><h4 class=\"uagb-heading-text\"><span class=\"ez-toc-section\" id=\"Requests_to_Unblock_Outbound_Email_via_SMTP\"><\/span>Requests to Unblock Outbound Email via SMTP<span class=\"ez-toc-section-end\"><\/span><\/h4><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">If you require the use of external SMTP servers to send system emails or transactional notifications, please submit a support ticket detailing your requirements for our review and assistance:<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-8203d057\"><h5 class=\"uagb-heading-text\"><span class=\"ez-toc-section\" id=\"For_Domestic_Customers_Vietnam\"><\/span>For Domestic Customers (Vietnam)<br><span class=\"ez-toc-section-end\"><\/span><\/h5><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Individuals: Please submit a request for vHost to review and approve the opening of the SMTP port.<br>Companies\/Enterprises: Please submit a request for vHost to review and approve the opening of the SMTP port.<\/li>\n\n\n\n<li>Companies\/Enterprises: Please submit a request for vHost to review and approve the opening of the SMTP port.<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-e5ee006d\"><h5 class=\"uagb-heading-text\"><span class=\"ez-toc-section\" id=\"For_International_Customers\"><\/span>For International Customers<span class=\"ez-toc-section-end\"><\/span><\/h5><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Individuals: Port unblocking for outbound SMTP is not supported.<\/li>\n\n\n\n<li>Companies\/Enterprises: Please submit a request for vHost to review and approve the opening of the SMTP port.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To request port unblocking, please open a formal support ticket via one of the following official channels:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ticket: <a href=\"https:\/\/members.vhost.vn\/tickets\/new\/\">https:\/\/members.vhost.vn\/tickets\/new\/<\/a><\/li>\n\n\n\n<li>Email: support@vHost.vn<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Effective Date: This policy officially enters into effect on December 5, 2025.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sincerely,<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Dear Valued Customers, Current Situation Recently, the lenient filtering and open-port configurations for email transmission on servers hosted at vHost have led to certain customers exploiting the system to send unsolicited spam emails. This uncontrolled activity has negatively impacted and compromised the reputation of all other IP addresses under vHost&#8217;s management. vHost is a Hosting [&hellip;]<\/p>\n","protected":false},"author":97,"featured_media":63302,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[479,118],"tags":[],"class_list":["post-63299","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bao-mat","category-news"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Email Anti Spam Policy - vHost<\/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:\/\/vhost.vn\/en\/email-anti-spam-policy\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Email Anti Spam Policy - vHost\" \/>\n<meta property=\"og:description\" content=\"Dear Valued Customers, Current Situation Recently, the lenient filtering and open-port configurations for email transmission on servers hosted at vHost have led to certain customers exploiting the system to send unsolicited spam emails. This uncontrolled activity has negatively impacted and compromised the reputation of all other IP addresses under vHost&#8217;s management. vHost is a Hosting [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/vhost.vn\/en\/email-anti-spam-policy\/\" \/>\n<meta property=\"og:site_name\" content=\"vHost\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/facebook.com\/vhostvn\" \/>\n<meta property=\"article:published_time\" content=\"2025-12-05T03:59:41+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-05-20T07:39:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/vhost.vn\/wp-content\/uploads\/2025\/12\/Email-Anti-Spam-Policy.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"628\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Nguy\u1ec5n Tr\u1ea7n H\u00d9NG\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@vhostvn\" \/>\n<meta name=\"twitter:site\" content=\"@vhostvn\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Nguy\u1ec5n Tr\u1ea7n H\u00d9NG\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/vhost.vn\\\/en\\\/email-anti-spam-policy\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/vhost.vn\\\/en\\\/email-anti-spam-policy\\\/\"},\"author\":{\"name\":\"Nguy\u1ec5n Tr\u1ea7n H\u00d9NG\",\"@id\":\"https:\\\/\\\/vhost.vn\\\/#\\\/schema\\\/person\\\/40e941de0617f1c5b8953eaf64b8f140\"},\"headline\":\"Email Anti Spam Policy\",\"datePublished\":\"2025-12-05T03:59:41+00:00\",\"dateModified\":\"2026-05-20T07:39:00+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/vhost.vn\\\/en\\\/email-anti-spam-policy\\\/\"},\"wordCount\":127,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/vhost.vn\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/vhost.vn\\\/en\\\/email-anti-spam-policy\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/vhost.vn\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/Email-Anti-Spam-Policy.png\",\"articleSection\":[\"B\u1ea3o m\u1eadt\",\"News\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/vhost.vn\\\/en\\\/email-anti-spam-policy\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/vhost.vn\\\/en\\\/email-anti-spam-policy\\\/\",\"url\":\"https:\\\/\\\/vhost.vn\\\/en\\\/email-anti-spam-policy\\\/\",\"name\":\"Email Anti Spam Policy - 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