{"id":29934,"date":"2025-08-27T12:50:23","date_gmt":"2025-08-27T05:50:23","guid":{"rendered":"https:\/\/dps.media\/kiem-tra-ban-ghi-dns-huong-dan-check-a-mx-cname-nhanh-chong\/"},"modified":"2025-08-27T23:15:00","modified_gmt":"2025-08-27T16:15:00","slug":"dns-record-check-guide-quickly-check-a-mx-cname-records","status":"publish","type":"post","link":"https:\/\/dps.media\/en\/dns-record-check-guide-quickly-check-a-mx-cname-records\/","title":{"rendered":"Check DNS Records: Quick Guide to Checking A, MX, CNAME"},"content":{"rendered":"<p>\t\t<\/p><div id=\"dps-dns-lookup-1-2555\" class=\"dps-dns-widget\" data-limit=\"100\" data-delay=\"120\" data-brand=\"DPS.MEDIA\" data-txt-all-dns=\"ALL DNS\" data-txt-stopping=\"Stopping...\" data-txt-enter-domain=\"Please enter at least one domain.\" data-txt-select-column=\"Please select at least one check type.\" data-txt-limit-exceeded=\"The list exceeds the limit of %s domains. Please split the list.\" data-txt-missing-config=\"Missing REST endpoint configuration.\" data-txt-stopped-at=\"Stopped at %s\/%s.\" data-txt-completed=\"Completed: %s domain(s) x %s column(s).\" data-txt-no-data-copy=\"No data to copy.\" data-txt-copied=\"TSV copied to clipboard.\" data-txt-copy-failed=\"Copy failed: %s\" data-txt-ready=\"Ready for DNS & server lookup\" data-txt-empty-subtext=\"One domain per line, check types are columns.\" data-txt-domain=\"Domain\" data-txt-empty=\"Empty\" data-txt-error=\"Error\" data-txt-conn-failed=\"Connection failed\" data-txt-no-cert=\"No certificate\" data-txt-parse-error=\"Parse error\" data-txt-days-left=\"days left\">\n\t\t\t<div class=\"dps-dns-shell\">\n\t\t\t\t<!-- Hidden translation container for TranslatePress compatibility -->\n\t\t\t\t<div class=\"dps-dns-translations\" style=\"display: none;\" aria-hidden=\"true\">\n\t\t\t\t\t<span class=\"t-txt-all-dns\">ALL DNS<\/span>\n\t\t\t\t\t<span class=\"t-txt-stopping\">Stopping...<\/span>\n\t\t\t\t\t<span class=\"t-txt-enter-domain\">Please enter at least one domain.<\/span>\n\t\t\t\t\t<span class=\"t-txt-select-column\">Please select at least one check type.<\/span>\n\t\t\t\t\t<span class=\"t-txt-limit-exceeded\">The list exceeds the limit of %s domains. Please split the list.<\/span>\n\t\t\t\t\t<span class=\"t-txt-missing-config\">Missing REST endpoint configuration.<\/span>\n\t\t\t\t\t<span class=\"t-txt-stopped-at\">Stopped at %s\/%s.<\/span>\n\t\t\t\t\t<span class=\"t-txt-completed\">Completed: %s domain(s) x %s column(s).<\/span>\n\t\t\t\t\t<span class=\"t-txt-no-data-copy\">No data to copy.<\/span>\n\t\t\t\t\t<span class=\"t-txt-copied\">TSV copied to clipboard.<\/span>\n\t\t\t\t\t<span class=\"t-txt-copy-failed\">Copy failed: %s<\/span>\n\t\t\t\t\t<span class=\"t-txt-ready\">Ready for DNS & server lookup<\/span>\n\t\t\t\t\t<span class=\"t-txt-empty-subtext\">One domain per line, check types are columns.<\/span>\n\t\t\t\t\t<span class=\"t-txt-domain\">Domain<\/span>\n\t\t\t\t\t<span class=\"t-txt-empty\">Empty<\/span>\n\t\t\t\t\t<span class=\"t-txt-error\">Error<\/span>\n\t\t\t\t\t<span class=\"t-txt-conn-failed\">Connection failed<\/span>\n\t\t\t\t\t<span class=\"t-txt-no-cert\">No certificate<\/span>\n\t\t\t\t\t<span class=\"t-txt-parse-error\">Parse error<\/span>\n\t\t\t\t\t<span class=\"t-txt-days-left\">days left<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"dps-dns-header\">\n\t\t\t\t\t<div class=\"dps-dns-header-mark\" aria-hidden=\"true\">DPS<\/div>\n\t\t\t\t\t<div class=\"dps-dns-header-copy\">\n\t\t\t\t\t\t<div class=\"dps-dns-title\">Bulk DNS & Server Lookup<\/div>\n\t\t\t\t\t\t<div class=\"dps-dns-subtitle\">Professional tool from DPS.MEDIA<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div class=\"dps-dns-brand\">DPS.MEDIA<\/div>\n\t\t\t\t<\/div>\n\n\t\t\t\t<div class=\"dps-dns-description\">Enter one domain per line, select columns to check, then copy results as TSV.<\/div>\n\n\t\t\t\t<div class=\"dps-dns-workbench\">\n\t\t\t\t\t<div class=\"dps-dns-input-panel\">\n\t\t\t\t\t\t<label class=\"dps-dns-label\" for=\"dps-dns-lookup-1-2555-domains\">Domain list<\/label>\n\t\t\t\t\t\t<div class=\"dps-dns-textarea-wrap\">\n\t\t\t\t\t\t\t<textarea id=\"dps-dns-lookup-1-2555-domains\" class=\"dps-dns-textarea\" rows=\"7\" spellcheck=\"false\" placeholder=\"dps.mediaexample.comhttps:\/\/sub.domain.com\/path\"><\/textarea>\n\t\t\t\t\t\t\t<div class=\"dps-dns-count\" aria-live=\"polite\">0<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t<div class=\"dps-dns-control-panel\">\n\t\t\t\t\t\t<div class=\"dps-dns-control-group\">\n\t\t\t\t\t\t\t<div class=\"dps-dns-label\">Columns to check<\/div>\n\t\t\t\t\t\t\t<div class=\"dps-dns-types\" role=\"group\" aria-label=\"Select DNS and server columns to check\"><\/div>\n\t\t\t\t\t\t<\/div>\n\n\t\t\t\t\t\t<div class=\"dps-dns-control-row\">\n\t\t\t\t\t\t\t<label class=\"dps-dns-delay\">\n\t\t\t\t\t\t\t\t<span class=\"dps-dns-label\">Delay<\/span>\n\t\t\t\t\t\t\t\t<span class=\"dps-dns-delay-input\">\n\t\t\t\t\t\t\t\t\t<input class=\"dps-dns-delay-field\" type=\"number\" min=\"50\" max=\"5000\" step=\"10\" value=\"120\">\n\t\t\t\t\t\t\t\t\t<span>ms<\/span>\n\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t<button class=\"dps-dns-button dps-dns-button-primary\" type=\"button\" data-action=\"run\">Start<\/button>\n\t\t\t\t\t\t\t<button class=\"dps-dns-button dps-dns-button-danger\" type=\"button\" data-action=\"stop\" hidden>Stop<\/button>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\n\t\t\t\t<div class=\"dps-dns-toolbar\">\n\t\t\t\t\t<button class=\"dps-dns-tool-button\" type=\"button\" data-action=\"copy\" disabled>Copy TSV<\/button>\n\t\t\t\t\t<button class=\"dps-dns-tool-button\" type=\"button\" data-action=\"clear\">Clear results<\/button>\n\t\t\t\t\t<div class=\"dps-dns-progress\" aria-hidden=\"true\"><span><\/span><\/div>\n\t\t\t\t\t<div class=\"dps-dns-status\" aria-live=\"polite\"><\/div>\n\t\t\t\t<\/div>\n\n\t\t\t\t<div class=\"dps-dns-error\" role=\"alert\" hidden><\/div>\n\t\t\t\t<div class=\"dps-dns-results\" aria-live=\"polite\">\n\t\t\t\t\t<div class=\"dps-dns-empty\">\n\t\t\t\t\t\t<div class=\"dps-dns-empty-icon\" aria-hidden=\"true\">Lookup<\/div>\n\t\t\t\t\t\t<div class=\"dps-dns-empty-title\">Ready for DNS & server lookup<\/div>\n\t\t\t\t\t\t<div class=\"dps-dns-empty-copy\">One domain per line, check types are columns.<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\n\t\t\t\t<div class=\"dps-dns-footer\">\n\t\t\t\t\t<span>Developed by<\/span>\n\t\t\t\t\t<a href=\"https:\/\/dps.media\/en\/\" target=\"_blank\" rel=\"noopener noreferrer\">DPS.MEDIA<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div><strong>Checking DNS records such as A, MX, CNAME helps ensure website and email operate stably and access speed is fast.<\/strong><p> This is a crucial factor for digital marketing success as user experience determines 75% of brand reliability. DPS.MEDIA has advised hundreds of SMEs and found that regularly checking DNS helps detect errors early and avoid business interruptions. Did you know it only takes a few minutes to quickly check these records?<br><img decoding=\"async\" class=\"kimage_class\" src=\"https:\/\/dps.media\/wp-content\/uploads\/2025\/08\/sion-3.jpgc29b.jpg\" alt=\"Explore DNS Records and Their Important Role in Digital Marketing Strategy\" title=\"\"><\/p><h2 id=\"kham-pha-ban-ghi-dns-va-vai-tro-quan-trong-trong-chien-luoc-digital-marketing\">Explore DNS Records and Their Crucial Role in Digital Marketing Strategy<\/h2><h3>What is a DNS record and why should marketers care?<\/h3><p>DNS records such as <strong>A, MX, CNAME<\/strong> not only affect website stability but are also closely related to the effectiveness of digital campaigns:<\/p><p>\u2013 A record: points the domain name to the correct server IP<br>\n\u2013 MX record: ensures emails sent and received are not lost or marked as spam<br>\n\u2013 CNAME: h\u1ed7 tr\u1ee3 c\u1ea5u h\u00ecnh ph\u00e2n ph\u1ed1i n\u1ed9i dung qua subdomain, cloud ho\u1eb7c tracking<\/p><p>An advertising campaign can fail just because of a wrong CNAME configuration causing pixel tracking to not work.<\/p><h3>How does DNS impact Martech tools?<\/h3><p><strong>Email marketing platforms<\/strong> (e.g., Mailchimp, Sendgrid) require SPF, DKIM authentication via DNS records to:<\/p><p>\u2013 T\u0103ng \u0111\u1ed9 tin c\u1eady email (Deliverability)<br>\n\u2013 Gi\u1ea3m t\u1ef7 l\u1ec7 v\u00e0o spam \u0111\u1ebfn 62% (theo EmailToolTester 2022)<br>\n\u2013 Comply with DMARC standards to protect the domain from spoofing<\/p><p>If marketers do not understand DNS, they risk losing thousands of contacts due to emails being blocked or marked as spam.<\/p><div class=\"wp-block-group has-background\">\n<p><strong>Tip:<\/strong> Regularly check MX records before major email automation campaigns to minimize delivery errors.<\/p>\n<\/div><h3>DNS Checklist for Digital Marketers<\/h3><ul>\n<li>\u2705 Check DNS A record \u2013 Is the website loading stably?<\/li>\n<li>\u2705 MX record ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang \u2013 Email c\u00f3 b\u1ecb tr\u1ea3 l\u1ea1i kh\u00f4ng?<\/li>\n<li>\u2705 Correctly installed SPF, DKIM, DMARC?<\/li>\n<li>\u2705 Is CNAME redirect tracking working?<\/li>\n<li>\u2705 SSL cert has no configuration errors from DNS?<\/li>\n<\/ul><h3>Real-life Examples of DNS Errors Affecting Performance<\/h3><p>M\u1ed9t SME ng\u00e0nh TM\u0110T t\u1eebng tri\u1ec3n khai chi\u1ebfn d\u1ecbch retargeting th\u00f4ng qua custom domain CNAME tracking.Tuy nhi\u00ean, b\u1ea3n ghi b\u1ecb l\u1ed7i do c\u1ea5u h\u00ecnh sai ph\u00eda DNS \u2013 k\u1ebft qu\u1ea3 g\u00f3p ph\u1ea7n khi\u1ebfn t\u1ef7 l\u1ec7 click gi\u1ea3m 32% v\u00e0 CPA t\u0103ng g\u1ea5p \u0111\u00f4i.<\/p><div class=\"wp-block-table\">\n<table class=\"WordPress\">\n<thead>\n<tr>\n<th>Incorrect DNS factor<\/th>\n<th>Consequence<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>MX not correct<\/td>\n<td>Email cannot be sent<\/td>\n<\/tr>\n<tr>\n<td>CNAME tracking incorrect<\/td>\n<td>Loss of user behavior data<\/td>\n<\/tr>\n<tr>\n<td>Missing DKIM<\/td>\n<td>Email goes to spam<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div><h3>Th\u00e1ch th\u1ee9c & l\u01b0u \u00fd khi ki\u1ec3m tra DNS<\/h3><p>\u2013 C\u00e1c h\u1ec7 th\u1ed1ng DNS c\u00f3 th\u1eddi gian c\u1eadp nh\u1eadt (propagation) t\u1eeb 1 \u0111\u1ebfn 48 gi\u1edd \u2013 c\u1ea7n l\u00ean k\u1ebf ho\u1ea1ch ki\u1ec3m tra s\u1edbm.<br>\n\u2013 Kh\u00f4ng ph\u1ea3i n\u1ec1n t\u1ea3ng DNS n\u00e0o c\u0169ng th\u00e2n thi\u1ec7n v\u1edbi non-tech marketer.<br>\n\u2013 Should coordinate with the IT or DevOps department to avoid technical errors.<\/p><p><strong>Brief takeaway:<\/strong> You don't need to code, but marketers need to understand DNS clearly to protect campaign performance and maintain user experience.<\/p><p><img decoding=\"async\" class=\"kimage_class\" src=\"https:\/\/dps.media\/wp-content\/uploads\/2025\/08\/ecords.jpg8e8f.jpg\" alt=\"Detailed Guide to Checking A Records to Ensure Website Access Speed\" title=\"\"><\/p><h2 id=\"huong-dan-chi-tiet-kiem-tra-ban-ghi-a-de-dam-bao-toc-do-truy-cap-website\">Detailed Guide to Checking A Records to Ensure Website Access Speed<\/h2><h3>What is an A record and why should it be checked?<\/h3><p>The A record (Address Record) in DNS maps a domain name to a specific IP address \u2013 it is a critical factor in helping browsers access the correct web hosting server. An incorrect A record can cause the website to slow down or become inaccessible.<\/p><p>According to a report from CDN Planet (2023), over 35% of website slow loading incidents are due to DNS configuration errors, especially from A records not updated with the correct IP.<\/p><div class=\"wp-block-group has-background\">\n  <strong>TIP:<\/strong> Even if DNS has been set up for a long time, you should check it periodically every 3 months or whenever hosting changes.\n<\/div><h3>Detailed Steps to Check A Records<\/h3><p>It's not difficult to check the A record yourself if you follow this checklist:<\/p><ul>\n<li>Use the ping or nslookup command on Windows\/macOS: <code data-no-translation=\"\">nslookup tenmiencuaban.com<\/code><\/li>\n<li>Access online tools such as DNSChecker.org or MXToolbox<\/li>\n<li>Compare the returned IP with the server IP provided by the hosting<\/li>\n<li>Ki\u1ec3m tra TTL (Time to Live) c\u1ee7a b\u1ea3n ghi \u2013 \u0111\u1ec1 xu\u1ea5t &lt; 300s for websites that require fast updates<\/li>\n<\/ul><p>If there is an IP mismatch or the record still points to the old server, update it immediately in the DNS manager (usually found in your domain or hosting account).<\/p><h3>Standard A Record Parameter Checklist<\/h3><table class=\"WordPress\">\n<thead>\n<tr>\n<th>Information<\/th>\n<th>Recommended Value<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Domain Name<\/td>\n<td>example.com<\/td>\n<\/tr>\n<tr>\n<td>Record type<\/td>\n<td>A<\/td>\n<\/tr>\n<tr>\n<td>IP address<\/td>\n<td>192.0.2.1<\/td>\n<\/tr>\n<tr>\n<td>TTL<\/td>\n<td>300<\/td>\n<\/tr>\n<\/tbody>\n<\/table><h3>Real-life Examples and Common Challenges<\/h3><p>An e-commerce startup migrated from shared hosting to VPS but forgot to update the A record. Result: 48 hours of website downtime despite purchasing a high-speed package. This led to a 36% traffic loss during the sales event week (according to internal Google Analytics, 2023).<\/p><div class=\"wp-block-group has-background\">\n  <strong>Note:<\/strong> Some DNS providers have update times of up to 24 hours. To optimize, use DNS managers that can instantly push A records like Cloudflare.\n<\/div><h3>Brief takeaway<\/h3><p>An accurate A record is the foundation of website performance. Check immediately after changing IPs, moving hosts, or seeing signs of slow loading \u2013 because fast access speed starts with the DNS configuration you are using.<br><img decoding=\"async\" class=\"kimage_class\" src=\"https:\/\/dps.media\/wp-content\/uploads\/2025\/08\/srr_01.jpg6d6e.jpg\" alt=\"Steps to Check MX Records to Ensure Smooth Business Email Operations\" title=\"\"><\/p><h2 id=\"cac-buoc-kiem-tra-ban-ghi-mx-giup-dam-bao-email-doanh-nghiep-luon-hoat-dong-muot-ma\">Steps to Check MX Records to Ensure Smooth Business Email Operation<\/h2><h3>1. Identify the current email provider<\/h3><p>First, you need to know which email service your business is using (Google Workspace, Microsoft 365, etc.). Each provider will have different requirements for records. <strong>MX (Mail Exchange)<\/strong>.- Example: Google Workspace requires MX records pointing to mail servers such as: ASPMX.L.GOOGLE.COM, ALT1, ALT2\u2026<br>\n\u2013 If unsure, try sending an email out and see if it works, or re-check the contract with IT\/former partner.<\/p><p><strong>Note:<\/strong> Using the wrong record can cause all emails to be undeliverable.<\/p><h3>2. Check current MX records using online tools<\/h3><p>There are many free tools that help you retrieve MX records in just a few seconds:<\/p><ul>\n<li><strong>mxtoolbox:<\/strong> https:\/\/mxtoolbox.com<\/li>\n<li><strong>Google Admin Toolbox:<\/strong> https:\/\/toolbox.googleapps.com\/apps\/dig\/<\/li>\n<\/ul><p>V\u00ed d\u1ee5, khi ki\u1ec3m tra mi\u1ec1n abccompany.vn tr\u00ean MXToolbox v\u00e0 th\u1ea5y mail server tr\u1ea3 v\u1ec1 \u201cmx.yandex.net\u201d,th\u00ec c\u00f3 ngh\u0129a h\u1ec7 th\u1ed1ng email \u0111ang ch\u1ea1y qua Yandex.<\/p><div class=\"wp-block-group has-background\" style=\"background-color:#f3f4f7;padding:10px\">\n  <strong>Tip:<\/strong> Compare the results with the configuration guide from your email provider. Many issues occur due to MX records having syntax errors, missing dots, or incorrect TTL values.\n<\/div><h3>3. Standard MX Configuration Checklist<\/h3><p>Below is a list of items to carefully check when configuring MX:<\/p><ul>\n<li>\u2714\ufe0f Correct mail server name (matching the provider's domain)<\/li>\n<li>\u2714\ufe0f At least one backup system (multiple MX records with different priority values)<\/li>\n<li>\u2714\ufe0f No duplicate or conflicting records<\/li>\n<li>\u2714\ufe0f TTL should not be lower than 300 seconds unless testing is required<\/li>\n<\/ul><h3>4. Common MX Record Checklist<\/h3><table class=\"WordPress\" border=\"1\" cellpadding=\"5\">\n<thead>\n<tr>\n<th>Provider<\/th>\n<th>MX record<\/th>\n<th>Priority<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Google Workspace<\/td>\n<td>ASPMX.L.GOOGLE.COM<\/td>\n<td>1<\/td>\n<\/tr>\n<tr>\n<td>Microsoft 365<\/td>\n<td>domain-com.mail.protection.outlook.com<\/td>\n<td>0<\/td>\n<\/tr>\n<tr>\n<td>Zoho Mail<\/td>\n<td>mx.zoho.com<\/td>\n<td>10<\/td>\n<\/tr>\n<\/tbody>\n<\/table><h3>5. Real Business Example: Lost Email Due to MX Error<\/h3><p>In 2022, an e-commerce business in Ho Chi Minh City reported losing all customer contact for nearly 3 days. The cause was the MX record being deleted when switching DNS providers without backing up the old configuration. According to the internal IT report, revenue was affected by up to 12%, equivalent to more than 500 million VND (Source: Internal technical report, 2022).<\/p><h3>Key Takeaway:<\/h3><p>Always check and maintain accurate MX records to avoid email service interruptions. Periodic checks every 3-6 months are a simple but effective way for any business to maintain professional communication.<br><\/p><h2 id=\"meo-nhanh-kiem-tra-ban-ghi-cname-va-ung-dung-trong-quan-ly-thuong-hieu-truc-tuyen\">Quick Tips for Checking CNAME Records and Their Application in Online Brand Management<\/h2><h3>How to Quickly Check CNAME Records<\/h3><p>To check the record <strong>CNAME<\/strong>,you can use online DNS checking tools such as:<\/p><p>\u2013 Google Admin Toolbox (toolbox.googleapps.com)<br>\n\u2013 DNSChecker.org or mxtoolbox.com<br>\n\u2013 Command line: <code data-no-translation=\"\">nslookup -type=CNAME subdomain.tenmien.com<\/code><\/p><p>An online tool provides almost instant results, very suitable for those with little technical knowledge. Ensure that the CNAME record does not duplicate or conflict with other records (such as an A record).<\/p><div class=\"wp-block-group has-background\" style=\"background-color:#f0f4f8;padding:15px;border-left:4px solid #3182ce\">\n  <strong>TIP:<\/strong> Avoid using CNAME records at the root domain level (e.g., yourbrand.com) as it may cause errors if not properly configured.\n<\/div><h3>Applications of CNAME in Brand Management<\/h3><p><strong>CNAME record<\/strong> is used to map subdomains like blog, shop, or mail to a third-party subdomain, for example:<\/p><p>\u2013 blog.tenmien.com \u2192 hosted-by.medium.com<br>\n\u2013 shop.tenmien.com \u2192 stores.shopify.com<\/p><p>This helps maintain brand consistency across external platforms. According to data from HubSpot Report 2022, <a href=\"https:\/\/dps.media\/en\/bulk-dns-lookup-optimal-solution-for-domain-management\/\" rel=\"nofollow\">68% of small and medium businesses use subdomains for content or ecommerce to maintain consistent brand identity<\/a>.<\/p><h3>Checklist for implementing CNAME for brands<\/h3><ul>\n<li>\u2705 Identify the subdomain to be mapped (e.g., blog, support, shop)<\/li>\n<li>\u2705 Check the current CNAME record using a DNS checker tool<\/li>\n<li>\u2705 X\u00e1c nh\u1eadn gi\u00e1 tr\u1ecb CNAME t\u1eeb b\u00ean cung c\u1ea5p n\u1ec1n t\u1ea3ng (Medium, Zendesk,\u2026)<\/li>\n<li>\u2705 Test the operation of each link after updating<\/li>\n<li>\u2705 Monitor TTL (time to Live) to know the record update time<\/li>\n<\/ul><h3>Real-life example: Checking CNAME for event landing page<\/h3><p>An event organizing brand uses a subdomain <em>event.domain.com<\/em> to point to an external platform like Eventbrite. After creating the CNAME record, they check using <code data-no-translation=\"\">nslookup<\/code> and verify that it points correctly to <code data-no-translation=\"\">pages.eventbrite.com<\/code>. This helps maintain brand quality without being split across long or hard-to-read URLs.<\/p><table class=\"WordPress\">\n<thead>\n<tr>\n<th>Subdomain<\/th>\n<th>target CNAME<\/th>\n<th>Status<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>event.brand.com<\/td>\n<td>pages.eventbrite.com<\/td>\n<td>\u2705 Active<\/td>\n<\/tr>\n<tr>\n<td>blog.brand.com<\/td>\n<td>custom.medium.com<\/td>\n<td>\u2705 Active<\/td>\n<\/tr>\n<\/tbody>\n<\/table><h3>Be cautious of risks when using CNAME<\/h3><p>\u2013 If the root domain record is accidentally overwritten \u2192 causes complete loss of access.<br>\n\u2013 Some CDNs or email services do not allow using CNAME at the apex level. - Easy to miss DNS updates when a third party changes the endpoint.<\/p><h3>Brief Takeaway<\/h3><p><strong>CNAME is an optimal tool<\/strong> to expand your brand without sacrificing consistency. Always check records regularly, especially before major campaigns, to avoid hidden errors that can reduce your brand's credibility in the digital environment.<br><img decoding=\"async\" class=\"kimage_class\" src=\"https:\/\/dps.media\/wp-content\/uploads\/2025\/08\/es_01c.jpg\" alt=\"Effective Tools for Checking and Managing DNS Records Specifically for SMEs\" title=\"\"><\/p><h2 id=\"nhung-cong-cu-hieu-qua-giup-kiem-tra-va-quan-ly-ban-ghi-dns-danh-rieng-cho-smes\">Effective Tools for Checking and Managing DNS Records Specifically for SMEs<\/h2><h3>Reliable and free DNS tools<\/h3><p>For small and medium enterprises (SMEs), choosing an effective DNS tool can help avoid website and email disruptions. Below are some popular, easy-to-use tools highly rated by the technical community:<\/p><ul>\n<li><strong>MXToolbox<\/strong>: Check A, MX, SPF, DKIM in just a few seconds<\/li>\n<li><strong>Google Admin Toolbox<\/strong>: Intuitive interface, suitable for beginners<\/li>\n<li><strong>DNSChecker<\/strong>: Supports DNS resolution checks by country<\/li>\n<li><strong>WhatsMyDNS.net<\/strong>: Check DNS record updates in real time globally<\/li>\n<\/ul><div class=\"wp-block-group has-background\">\n<p><strong>Tip:<\/strong> Always check MX and SPF records whenever you change email providers to avoid emails being marked as spam.<\/p>\n<\/div><h3>Periodic DNS record checklist for SMEs<\/h3><p>Regularly checking important DNS records helps maintain the stability of email and website systems. SMEs can implement a bi-weekly check schedule with the following steps:<\/p><ul>\n<li>\u2714\ufe0f Check that the A record points to the correct current IP<\/li>\n<li>\u2714\ufe0f Cross-check CNAME records with linked services (subdomain, CDN)<\/li>\n<li>\u2714\ufe0f Review MX, SPF, DKIM records to ensure email works properly<\/li>\n<li>\u2714\ufe0f Compare TTL to determine effective update times<\/li>\n<\/ul><h3>Summary table of DNS tools by purpose<\/h3><table class=\"WordPress\">\n<thead>\n<tr>\n<th>Tools<\/th>\n<th>Main function<\/th>\n<th>Suitable for<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>MXToolbox<\/td>\n<td>Check MX, A, SPF, blacklist<\/td>\n<td>SMEs with business email<\/td>\n<\/tr>\n<tr>\n<td>DNSChecker<\/td>\n<td>Global DNS check<\/td>\n<td>Businesses with international users<\/td>\n<\/tr>\n<tr>\n<td>Cloudflare DNS Analytics<\/td>\n<td>Monitor DNS queries in real time<\/td>\n<td>SMEs using Cloudflare<\/td>\n<\/tr>\n<\/tbody>\n<\/table><h3>Real-life example from a retail business<\/h3><p>An SME in the retail sector once experienced missed orders due to incorrect MX records after switching to a new email provider. After checking with MXToolbox and updating the correct records, the inbox delivery rate increased back to 95% in just 24 hours (according to internal Q2\/2023 statistics).<\/p><h3>Risks if DNS is not checked regularly<\/h3><p>If DNS records are not checked regularly, businesses may encounter the following errors:<\/p><ul>\n<li>\u274c Website inaccessible due to incorrect A record<\/li>\n<li>\u274c Email sent to spam or completely blocked<\/li>\n<li>\u274c Subdomain loses connection with third-party services<\/li>\n<\/ul><div class=\"wp-block-group has-background\">\n<p><strong>Note:<\/strong> DNS has a distributed structure, so even a small record error can affect the entire system.<\/p>\n<\/div><h3>Brief takeaway<\/h3><p>For SMEs, using free tools and regularly checking DNS is a simple but extremely effective way to protect daily digital operations. Choose the right tool for your needs to save time and reduce operational risks.<br><img decoding=\"async\" class=\"kimage_class\" src=\"https:\/\/dps.media\/wp-content\/uploads\/2025\/08\/efault.jpgae9c.jpg\" alt=\"Advice from DPS MEDIA to Optimize DNS Records Supporting Digital Marketing Campaigns\" title=\"\"><\/p><h2 id=\"loi-khuyen-tu-dps-media-de-toi-uu-ban-ghi-dns-ho-tro-chien-dich-marketing-ky-thuat-so\">Advice from DPS MEDIA to Optimize DNS Records Supporting Digital Marketing Campaigns<\/h2><h3>Understand the correct role of DNS records<\/h3><p>DNS records are a foundational factor that directly affects website visibility and email deliverability in digital marketing campaigns. Some important records to pay attention to:<\/p><p>\u2013 <strong>A record<\/strong>: Points the domain to the main server IP address<br>\n\u2013 <strong>MX record<\/strong>: Supports sending\/receiving emails, especially important for Email Marketing<br>\n\u2013 <strong>CNAME<\/strong>: Easily configures subdomains for landing pages, remarketing, etc.<\/p><p>A 2023 study by HubSpot showed that: 71% of failed email campaigns are due to DNS setup errors (source: HubSpot Email Deliverability Report 2023).<\/p><h3>Effective DNS configuration checklist for marketers<\/h3><p>To optimize DNS for marketing activities, make sure to follow these steps:<\/p><ul>\n<li>Verify the domain with platforms like Google, Meta, Zoho using TXT records<\/li>\n<li>Set up SPF, DKIM, and DMARC to increase <strong>email reliability<\/strong><\/li>\n<li>Use CNAME records to configure custom domains for landing pages<\/li>\n<li>Ki\u1ec3m tra th\u1eddi gian TTL \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng c\u1eadp nh\u1eadt nhanh khi ch\u1ea1y A\/B test<\/li>\n<\/ul><div class=\"wp-block-group has-background\">\n  <strong>TIP:<\/strong> Regularly implement DNS checking tools via services like DNS Checker, Google Admin Toolbox, or MXToolBox.\n<\/div><h3>Sample DNS records to set up for email marketing<\/h3><table class=\"WordPress\">\n<thead>\n<tr>\n<th>Record Type<\/th>\n<th>Value<\/th>\n<th>Purpose<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>SPF<\/td>\n<td>v=spf1 include:mailprovider.com ~all<\/td>\n<td>Authenticate sending emails from the provider<\/td>\n<\/tr>\n<tr>\n<td>DKIM<\/td>\n<td>selector._domainkey.example.com<\/td>\n<td>Email signature encryption<\/td>\n<\/tr>\n<tr>\n<td>DMARC<\/td>\n<td>v=DMARC1; p=quarantine;<\/td>\n<td>Anti-email spoofing<\/td>\n<\/tr>\n<\/tbody>\n<\/table><h3>Practical example from a (anonymous) client<\/h3><p>An SME in the service industry improved their email open rate from 81% to 241% after properly adjusting SPF and DKIM records as recommended by DPS.MEDIA. The setup took only 3 hours, but the results remained stable for 6 months after the campaign.<\/p><h3>Warning: Common risks<\/h3><p>\u2013 Misconfigured MX can prevent emails from being sent\/received<br>\n\u2013 TTL qu\u00e1 cao l\u00e0m ch\u1eadm kh\u1ea3 n\u0103ng c\u1eadp nh\u1eadt n\u1ed9i dung test A\/B<br>\n\u2013 Thi\u1ebfu b\u1ea3n ghi TXT x\u00e1c th\u1ef1c c\u00f3 th\u1ec3 khi\u1ebfn chi\u1ebfn d\u1ecbch qu\u1ea3ng c\u00e1o b\u1ecb t\u1eeb ch\u1ed1i (v\u00ed d\u1ee5: Meta Business Suite)<\/p><div class=\"wp-block-group has-background\">\n  <strong>TIP:<\/strong> Before each campaign, check TTL and authentication records to avoid the risk of sending from the wrong IP or losing domain reputation.\n<\/div><h3>Quick summary:<\/h3><p>Optimizing DNS is not just a technical task \u2013 it is a vital part of helping digital marketing campaigns achieve high efficiency, from landing page display and email security to accelerating remarketing campaigns. When implemented correctly, marketers will have a \u201chidden lever\u201d to increase impressions and conversion rates.<br><img decoding=\"async\" class=\"kimage_class\" src=\"https:\/\/dps.media\/wp-content\/uploads\/2025\/08\/ecord-.jpg\" alt=\"Proactively Handling DNS Record Issues Helps Businesses Increase Stability and Reliability\" title=\"\"><\/p><h2 id=\"xu-ly-su-co-ban-ghi-dns-mot-cach-chu-dong-giup-doanh-nghiep-tang-tinh-on-dinh-va-tin-cay\">Proactively Handling DNS Record Issues Helps Businesses Increase Stability and Reliability<\/h2><h3>Reasons why businesses need to monitor DNS regularly<\/h3><p>Incorrect or missing DNS records can result in emails not being sent, websites being inaccessible, or internal services being disrupted. According to the Digital Infrastructure Security Report by IDC (2022), over 36% of small businesses have experienced downtime due to undetected DNS errors. Some common consequences of poor DNS control:<\/p><p>\u2013 Website access interrupted nationwide<br>\n\u2013 Loss of traffic and e-commerce revenue<br>\n\u2013 Business emails marked as spam or failing to send<br>\n\u2013 Information exposure if DNS is spoofed (DNS Spoofing)<\/p><h3>Proactive checklist for handling and preventing DNS issues<\/h3><p>Instead of only reacting when errors are detected, businesses should implement a regular DNS record check plan to detect and resolve issues early:<\/p><ul>\n<li>\u2714 Regularly check A, MX, and CNAME records weekly<\/li>\n<li>\u2714 Set up alerts if the domain expires or DNS parameters change<\/li>\n<li>\u2714 Monitor DNS uptime with tools like UptimeRobot, Pingdom<\/li>\n<li>\u2714 Log all DNS changes for easier auditing<\/li>\n<li>\u2714 Training the technical team to handle domain name resolution errors<\/li>\n<\/ul><h3>Sample DNS record monitoring table plays an important role<\/h3><table class=\"wp-block-table wordpress\">\n<thead>\n<tr>\n<th>Record type<\/th>\n<th>Subdomain<\/th>\n<th>Value<\/th>\n<th>Update date<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>A<\/td>\n<td>example.com<\/td>\n<td>203.113.123.45<\/td>\n<td>05\/03\/2024<\/td>\n<\/tr>\n<tr>\n<td>MX<\/td>\n<td>@<\/td>\n<td>mail.example.com (Priority 10)<\/td>\n<td>02\/03\/2024<\/td>\n<\/tr>\n<tr>\n<td>CNAME<\/td>\n<td>www<\/td>\n<td>example.com<\/td>\n<td>01\/03\/2024<\/td>\n<\/tr>\n<\/tbody>\n<\/table><div class=\"wp-block-group has-background\">\n<p><strong>TIP:<\/strong> Assign DNS management responsibility to a specific department and use DNS audit services to detect unauthorized changes from third parties.<\/p>\n<\/div><h3>Real-life example: 8 hours downtime due to MX record error<\/h3><p>An e-commerce business just launched an email marketing campaign but received no user feedback. After 8 hours of investigation, they discovered the MX record pointed to the wrong SMTP server. The result was a loss of over 1,200 potential orders \u2013 according to internal summary (2023).<\/p><h3>Note on implementing DNS to prevent domain name resolution errors<\/h3><p>\u2013 Avoid using free DNS if the business has high traffic<br>\n\u2013 S\u1eed d\u1ee5ng DNS redundancy (nh\u01b0 Cloudflare + DNS g\u1ed1c)<br>\n\u2013 K\u1ebft h\u1ee3p ki\u1ec3m tra DNS v\u1edbi vi\u1ec7c \u0111\u00e1nh gi\u00e1 b\u1ea3o m\u1eadt SSL\/TLS \u0111\u1ecbnh k\u1ef3<\/p><h3>Key Takeaway:<\/h3><p>Proactively controlling DNS records not only helps businesses maintain stable operations but also reduces the risk of data loss, lost orders, and long-term reputation damage. A simple, regularly updated plan can make a big difference. <\/p><h2 id=\"outro\">Valuable lessons<\/h2><p>Checking DNS records such as A, MX, and CNAME helps ensure website stability. It also supports quick troubleshooting of connection issues.<\/p><p>Try out the DNS lookup tools you just read about. Start by checking your business domain.<\/p><p>You can learn more about optimizing website speed or configuring SEO-standard SSL. This is an important next step in your digital strategy.<\/p><p>DPS.MEDIA always accompanies Vietnamese SMEs on their digital transformation journey. Join the discussion and share your questions in the comments below!<\/p><p class=\"wp-block-paragraph\"><\/p>","protected":false},"excerpt":{"rendered":"<p>Explore how to quickly and effectively check DNS records \u2013 from A, MX to CNAME. Detailed instructions help you grasp and handle domain information accurately and easily.<\/p>","protected":false},"author":13,"featured_media":29935,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[70],"tags":[1126,1069,680,1096],"class_list":["post-29934","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc","tag-bao-mat-mang","tag-dns","tag-huong-dan-ky-thuat","tag-quan-tri-he-thong"],"acf":[],"rankmath_keywords":{"primary":"","secondary":[""]},"yoast_keywords":{"primary":"","secondary":[]},"yoast_focuskw":"","rankmath_focuskw":"","seo_keywords":{"primary":"","secondary":[""]},"_links":{"self":[{"href":"https:\/\/dps.media\/en\/wp-json\/wp\/v2\/posts\/29934","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dps.media\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dps.media\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dps.media\/en\/wp-json\/wp\/v2\/users\/13"}],"replies":[{"embeddable":true,"href":"https:\/\/dps.media\/en\/wp-json\/wp\/v2\/comments?post=29934"}],"version-history":[{"count":0,"href":"https:\/\/dps.media\/en\/wp-json\/wp\/v2\/posts\/29934\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dps.media\/en\/wp-json\/wp\/v2\/media\/29935"}],"wp:attachment":[{"href":"https:\/\/dps.media\/en\/wp-json\/wp\/v2\/media?parent=29934"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dps.media\/en\/wp-json\/wp\/v2\/categories?post=29934"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dps.media\/en\/wp-json\/wp\/v2\/tags?post=29934"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}