{"id":86837,"date":"2023-07-31T09:39:58","date_gmt":"2023-07-31T09:39:58","guid":{"rendered":"https:\/\/postmansmtp.com\/?p=86837"},"modified":"2026-03-05T04:16:53","modified_gmt":"2026-03-05T04:16:53","slug":"dns-ptr-record","status":"publish","type":"post","link":"https:\/\/postmansmtp.com\/es\/dns-ptr-record\/","title":{"rendered":"What is a DNS PTR Record, and Why Do You Need One?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">As a website owner, you want your emails to land in the customer&#8217;s inbox instead of the spam folder. That&#8217;s where the DNS PTR record comes into play! It prevents your emails from ending up in spam folders.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you are still wondering what DNS PTR Record is and why I need one? Then, keep reading as, in this article, we will cover everything about PTR records, such as;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>What is a DNS PTR record, and How Does it Work?<\/li>\n\n\n\n<li>Why Do You Need a DNS PTR Record?<\/li>\n\n\n\n<li>How to Check and Create a DNS PTR Record<\/li>\n\n\n\n<li>What other DNS Records Do You Need to Create?<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">So, without wasting any time, let\u2019s dive right in!<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What is a DNS PTR record, and How Does it Work?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A DNS PTR record is a type of DNS record that links an IP address to a domain name. It is the opposite of the A record (DNS A record), which links a domain name to an IP address. DNS PTR record helps you with reverse DNS lookups, which are queries that start with an IP address and look up the domain name.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"746\" height=\"420\" src=\"https:\/\/postmansmtp.com\/wp-content\/uploads\/2023\/07\/Untitled-1_-IP-address-and-look-up-the-domain-name.jpg\" alt=\"IP address lookup and domain name resolution interface.\" class=\"wp-image-86841\" srcset=\"https:\/\/postmansmtp.com\/wp-content\/uploads\/2023\/07\/Untitled-1_-IP-address-and-look-up-the-domain-name.jpg 746w, https:\/\/postmansmtp.com\/wp-content\/uploads\/2023\/07\/Untitled-1_-IP-address-and-look-up-the-domain-name-300x169.jpg 300w\" sizes=\"auto, (max-width: 746px) 100vw, 746px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The syntax of a DNS PTR record is as follows:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>&lt;name&gt; &lt;ttl&gt; &lt;class&gt; &lt;type&gt; &lt;rdata&gt;<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Where:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>&lt;name&gt;<\/strong> is the IP address in reverse order, with .in-addr.arpa added for IPv4 or .ip6.arpa added for IPv6<\/li>\n\n\n\n<li><strong>&lt;ttl&gt;<\/strong> is the time to live in seconds, which specifies how long the record is valid for<\/li>\n\n\n\n<li><strong>&lt;class&gt;<\/strong> is the network class, usually IN for internet<\/li>\n\n\n\n<li><strong>&lt;type&gt;<\/strong> is PTR to indicate the record type<\/li>\n\n\n\n<li><strong>&lt;rdata&gt;<\/strong> is the domain name associated with the IP address<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">For example, a PTR record example for the <strong>IP address 192.0.2.244<\/strong> and the domain name <strong>example.com<\/strong> would look like this:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>244.2.0.192.in-addr.arpa. IN PTR example.com<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Why Do You Need a DNS PTR Record?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Your DNS PTR record can help you improve <a href=\"https:\/\/postmansmtp.com\/how-to-choose-the-right-smtp-port\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>email deliverability<\/strong><\/a> because some email servers use reverse DNS for <a href=\"https:\/\/postmansmtp.com\/email-domain-authentication\/\" target=\"_blank\" rel=\"noreferrer noopener\">email domain authentication<\/a>. If your IP address has no PTR record or a mismatched domain name, the recipient email server might reject or mark your email as spam.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Along with improved email deliverability, DNS PTR records can help with the following:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Troubleshooting Email Delivery Issues:<\/strong> DNS PTR records help you identify the source of bounced or delayed emails.<\/li>\n\n\n\n<li><strong>Better Email Logging: <\/strong>Having PTR records, you can convert IP addresses into domain names for more readable and meaningful logs.<\/li>\n\n\n\n<li><strong>Enhance Security: <\/strong>It increases your security, as you can perform reverse DNS lookups to detect malicious or suspicious activity from unknown IP addresses.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">As it is clear that having a PTR Record is absolutely necessary, does it mean that you should create a PTR record? No, because your email provider or web hosting company would have already done it for you.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Now, move on, and let&#8217;s see how you can double-check whether your provider has created a PTR record. If they haven&#8217;t, then how can you create one?<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>How to Check and Create a PTR Record<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">To check if your IP address has a PTR record, you can use online tools such as the <a href=\"https:\/\/mxtoolbox.com\/ReverseLookup.aspx\" target=\"_blank\" rel=\"noreferrer nofollow noopener\">reverse lookup tool at MX Toolbox<\/a> and <a href=\"https:\/\/dnschecker.org\/reverse-dns.php\" target=\"_blank\" rel=\"noreferrer nofollow noopener\">DNS Checker<\/a>. These tools will show you the domain name associated with an IP address or tell you if a PTR record is missing.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When you enter the IP address of your server and click Reverse Lookup, the following information will appear;<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1527\" height=\"524\" src=\"https:\/\/postmansmtp.com\/wp-content\/uploads\/2023\/07\/How-to-Check-and-Create-a-PTR-Record.png\" alt=\"Illustration of a PTR record setup process, with step-by-step instructions.\" class=\"wp-image-86840\" srcset=\"https:\/\/postmansmtp.com\/wp-content\/uploads\/2023\/07\/How-to-Check-and-Create-a-PTR-Record.png 1527w, https:\/\/postmansmtp.com\/wp-content\/uploads\/2023\/07\/How-to-Check-and-Create-a-PTR-Record-300x103.png 300w, https:\/\/postmansmtp.com\/wp-content\/uploads\/2023\/07\/How-to-Check-and-Create-a-PTR-Record-1024x351.png 1024w, https:\/\/postmansmtp.com\/wp-content\/uploads\/2023\/07\/How-to-Check-and-Create-a-PTR-Record-768x264.png 768w\" sizes=\"auto, (max-width: 1527px) 100vw, 1527px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">In case of a missing PTR record, you might wonder how to set a PTR record in DNS.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The simple answer is you will have to create one or ask your web hosting or email service provider to create one for you.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Usually, you can not add your own PTR record because you probably don&#8217;t have control over the \u00abreverse DNS zone\u00bb for your website&#8217;s domain. It&#8217;s different from the zone where you set up your website&#8217;s regular addresses, \u00abA records.\u00bb<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">But if you have control over this reverse DNS or use a specific DNS provider, you can create your own PTR record. Here are some guides on how to do it for different services:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>For <a href=\"https:\/\/repost.aws\/knowledge-center\/route-53-reverse-dns\" target=\"_blank\" rel=\"noreferrer nofollow noopener\">Amazon AWS<\/a>, follow their guide to create a PTR record.<\/li>\n\n\n\n<li>If you use <a href=\"https:\/\/cloud.google.com\/compute\/docs\/instances\/create-ptr-record#:~:text=In%20the%20Public%20DNS%20PTR,your%20previously%20reserved%20IP%20address.\" target=\"_blank\" rel=\"noreferrer nofollow noopener\">Google Cloud<\/a>, see their PTR record setup tutorial.<\/li>\n\n\n\n<li>In the case of <a href=\"https:\/\/learn.microsoft.com\/en-us\/azure\/dns\/dns-reverse-dns-hosting#create-a-dns-ptr-record:~:text=domain%20name%20registrar.-,Create%20a%20DNS%20PTR%20record,-IPv4\" target=\"_blank\" rel=\"noreferrer nofollow noopener\">Microsoft Azure<\/a>, use this PTR record creation guide.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">According to our earlier example of an IP address of <strong>192.0.2.244,<\/strong> with the domain <strong>example.com<\/strong>, the PTR record would look like this:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>244.2.0.192.in-addr.arpa. IN PTR example.com<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>What other DNS Records Do You Need to Create?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As a Post SMTP user, you might need to add additional DNS records to your domain&#8217;s DNS (Domain Name System). This will help to ensure that your emails get delivered properly.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">There are three important DNS records you can add:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>SPF Record: <\/strong>This record tells which IP addresses or domains can send emails through your domain. You should have only one SPF record; having more than one can cause problems. If you have multiple SPF records, you can follow our guide to merge <a href=\"https:\/\/postmansmtp.com\/multiple-spf-records\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>multiple SPF records<\/strong><\/a> into one.<\/li>\n\n\n\n<li><strong>DKIM Record:<\/strong> DKIM signs your emails, which ensures that they haven&#8217;t been changed while on their way from your email to the recipient. It adds an extra layer of security.<\/li>\n\n\n\n<li><strong>DMARC Record:<\/strong> A <a href=\"https:\/\/postmansmtp.com\/what-is-a-dmarc-record\/\" target=\"_blank\" rel=\"noreferrer noopener\">DMARC record<\/a> helps prevent your emails from ending up in spam folders. It also provides reports if someone tries to misuse your email.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">If you don&#8217;t know which records to add, you can check our detailed documentation for your email provider:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/postmansmtp.com\/documentation\/postman-smtp-documentation\/pro-extensions\/setup-the-amazon-ses-mailer-in-post-smtp\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Amazon SES<\/strong><\/a><\/li>\n\n\n\n<li><a rel=\"noreferrer noopener\" href=\"https:\/\/postmansmtp.com\/documentation\/postman-smtp-documentation\/pro-extensions\/configure-office-365-integration\/\" target=\"_blank\"><strong>Office 365<\/strong><\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/postmansmtp.com\/documentation\/postman-smtp-documentation\/pro-extensions\/zoho-mail-extension\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Zoho Mail<\/strong><\/a><\/li>\n\n\n\n<li><strong><a href=\"https:\/\/postmansmtp.com\/documentation\/sockets-addons\/how-to-setup-sendgrid-with-post-smtp\/\" target=\"_blank\" rel=\"noreferrer noopener\">Sendgrid<\/a><\/strong><\/li>\n\n\n\n<li><strong><a href=\"https:\/\/postmansmtp.com\/documentation\/sockets-addons\/how-to-setup-sendinblue-aka-brevo-with-post-smtp\/\" target=\"_blank\" rel=\"noreferrer noopener\">Brevo (formerly Sendinblue)<\/a><\/strong><\/li>\n\n\n\n<li><strong><a href=\"https:\/\/postmansmtp.com\/documentation\/sockets-addons\/postmark\/\" target=\"_blank\" rel=\"noreferrer noopener\">Postmark<\/a><\/strong><\/li>\n\n\n\n<li><strong><a href=\"https:\/\/postmansmtp.com\/documentation\/sockets-addons\/sparkpost\/\" target=\"_blank\" rel=\"noreferrer noopener\">SparkPost<\/a><\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Once you set up these DNS records, your emails should have a better chance of reaching the inbox, and you&#8217;ll face fewer issues with any sort of email warnings.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>To Sum It Up<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">DNS PTR records are essential for reverse DNS lookups, which can improve your email deliverability, logging, and security. You need to have at least one PTR record for each IP address you use.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Additionally, for better email delivery, you have to use the <a rel=\"noreferrer noopener\" href=\"https:\/\/postmansmtp.com\/wordpress-smtp-configuration\/\" target=\"_blank\"><strong>Post SMTP plugin with the right configurations<\/strong><\/a>, which routes your emails through a reliable SMTP server so that they reach the inbox instead of going to the spam folder.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">We hope this article has helped you understand what a DNS PTR record is and why you need one. If you have any questions or need help configuring Post SMTP or any other email delivery-related issues, please contact us <a rel=\"noreferrer noopener\" href=\"https:\/\/postmansmtp.com\/configuration-request\/\" target=\"_blank\"><strong>here<\/strong><\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Frequently Asked Questions<\/strong><\/h2>\n\n\n","protected":false},"excerpt":{"rendered":"<p>As a website owner, you want your emails to land in the customer&#8217;s inbox instead of the spam folder. That&#8217;s where the DNS PTR record comes into play! It prevents your emails from ending up in spam folders. If you are still wondering what DNS PTR Record is and why [&hellip;]<\/p>\n","protected":false},"author":6276,"featured_media":86844,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_titles_title":"What is a DNS PTR Record, and Why Do You Need One?","_seopress_titles_desc":"Want to learn about DNS PTR records? This article will explain reverse DNS and how to check and create your own DNS PTR Record if you need one.","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"none","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"What is a DNS PTR Record, and Why Do You Need One?","_seopress_social_fb_desc":"Want to learn about DNS PTR records? 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Ali","author_link":"https:\/\/postmansmtp.com\/es\/author\/tahir\/"},"uagb_comment_info":0,"uagb_excerpt":"As a website owner, you want your emails to land in the customer&#8217;s inbox instead of the spam folder. That&#8217;s where the DNS PTR record comes into play! It prevents your emails from ending up in spam folders. If you are still wondering what DNS PTR Record is and why [&hellip;]","coauthors":[],"tax_additional":{"categories":{"linked":["<a href=\"https:\/\/postmansmtp.com\/category\/guides\/\" class=\"advgb-post-tax-term\">Guides<\/a>"],"unlinked":["<span class=\"advgb-post-tax-term\">Guides<\/span>"]}},"comment_count":"0","relative_dates":{"created":"Publicado 3 a\u00f1os hace","modified":"Actualizado 4 meses hace"},"absolute_dates":{"created":"Publicado el julio 31, 2023","modified":"Actualizado el marzo 5, 2026"},"absolute_dates_time":{"created":"Publicado el julio 31, 2023 9:39 am","modified":"Actualizado el marzo 5, 2026 4:16 am"},"featured_img_caption":"","series_order":"","_links":{"self":[{"href":"https:\/\/postmansmtp.com\/es\/wp-json\/wp\/v2\/posts\/86837","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/postmansmtp.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/postmansmtp.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/postmansmtp.com\/es\/wp-json\/wp\/v2\/users\/6276"}],"replies":[{"embeddable":true,"href":"https:\/\/postmansmtp.com\/es\/wp-json\/wp\/v2\/comments?post=86837"}],"version-history":[{"count":0,"href":"https:\/\/postmansmtp.com\/es\/wp-json\/wp\/v2\/posts\/86837\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/postmansmtp.com\/es\/wp-json\/wp\/v2\/media\/86844"}],"wp:attachment":[{"href":"https:\/\/postmansmtp.com\/es\/wp-json\/wp\/v2\/media?parent=86837"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/postmansmtp.com\/es\/wp-json\/wp\/v2\/categories?post=86837"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/postmansmtp.com\/es\/wp-json\/wp\/v2\/tags?post=86837"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}