{"id":4122,"date":"2017-07-18T01:27:37","date_gmt":"2017-07-18T01:27:37","guid":{"rendered":"https:\/\/www.inmotionhosting.com\/support\/2017\/07\/18\/configuring-your-vps-dedicated-server-as-a-mail-server\/"},"modified":"2021-08-16T22:37:10","modified_gmt":"2021-08-17T02:37:10","slug":"configuring-your-vps-dedicated-server-as-a-mail-server","status":"publish","type":"post","link":"https:\/\/www.inmotionhosting.com\/support\/email\/configuring-your-vps-dedicated-server-as-a-mail-server\/","title":{"rendered":"Configuring Your VPS or Dedicated Server as a Mail Server"},"content":{"rendered":"<p>Many common email providers enforce <strong>guidelines and policies for sending\/receiving email<\/strong>. Typically, they will publish their acceptable use policies. For example, <a title=\"Click here to navigate to Google's website to review their 'Bulk Senders Guidelines'.\" href=\"https:\/\/support.google.com\/mail\/answer\/81126\" target=\"_blank\" rel=\"noopener\">Google<\/a>, <a title=\"Click here to navigate to Yahoo's website to review their 'Bulk email industry standards and best practices'.\" href=\"https:\/\/help.yahoo.com\/kb\/SLN3435.html\" target=\"_blank\" rel=\"noopener\">Yahoo!<\/a>, and <a title=\"Click here to visit AOL's website to review their 'Best Practices'.\" href=\"https:\/\/postmaster.aol.com\/best-practices\" target=\"_blank\" rel=\"noopener\">AOL<\/a> all provide <strong>best practices<\/strong> to help reduce the amount of <strong>Spam<\/strong> within their respective networks.<\/p>\n<p>By the end of this article, you will know how to configure your domain and VPS or Dedicated server to ensure <em>third party mail servers<\/em> can authenticate the identity of your server. This will allow them to confirm that your domain is authorized to send mail from the IP address assigned by your server, avoiding <em>IP blacklisting<\/em>.<\/p>\n<h2>Authentication via DNS Records<\/h2>\n<p>As internet security standards evolve, more and more mail servers are requiring the implementation of a few TXT records. These records are simple text DNS records that contain, you guessed it&#8211;text. This text is specifically read and used by a mail server when an email is presented for delivery. Depending on the records (and its configuration), the mail server will process email delivery accordingly. Below is a summary and brief description for each DNS record.<\/p>\n<p>The first record we&#8217;ll discuss is the <b>Sender Policy Framework<\/b> <i>(SPF)<\/i> record. SPF records allow you to create your own policy that dictates authorized senders. This means that only those on the list are able to be authenticated by any receiving server that is reviewing the SPF record. Upon a successful check, the email is assumed to be legitimate. If the check is unsuccessful, the email is considered <i>spoofed<\/i> (illegitimate) and dealt with according to how the SPF policy is set up. You can see more information and details on implementing an effective SPF record for your domain in our <a title=\"Click here to navigate to our guide to learn how to setup SPF records in cPanel.\" href=\"\/support\/email\/spf-records-guide\/\">Guide to SPF Records<\/a>.<\/p>\n<p>The second powerful record that\u2019s important to enable, is your <b>DomainKeys Identified Mail<\/b> (<i>DKIM<\/i>) record. DKIM works like a digital signature, which when configured properly, can verify that the contents of the message have not been modified during transit. Typically this is useful in preventing the forgery of the <i>From:<\/i> address within the message headers, which is a common practice among spammers, called <i>spoofing<\/i>. In short, DKIM helps to uphold the integrity of an email during delivery, preventing your domain from appearing similar to a spoofed or Spam email. DKIM is simply enabled\/disabled via cPanel. If you need more help with enabling DKIM, you can always refer to our article <a title=\"Click here to navigate to our guide to learn how to enable DKIM in cPanel.\" href=\"\/support\/email\/spf-records-domain-keys-combating-spam\/\">SPF Records and Domain Keys: Combating Spam<\/a>.<\/p>\n<p>After you enable SPF\/DKIM, you\u2019ll want to ensure you have a <strong>DMARC<\/strong> (<em>Domain-based Message Authentication, Reporting &amp; Conformance<\/em>) record configured. This is your opportunity to specify how mail servers should handle messages from your domain that do not have valid SPF and DKIM records setup. Although you are pro-actively creating these records, a DMARC record can prove useful for a couple reasons. Because you can configure notifications of SPF\/DKIM failures, you can identify &#8216;phishy&#8217; behavior and take corrective action to prevent Spam from being sent from your server unknowingly. Also, since the DMARC standard is used by many email providers (such as Gmail, Yahoo, AOL, etc.), it can improve your sending ability. You can learn how to configure a basic DMARC record, in our article, <a title=\"Click here to navigate to our guide to learn how to setup DMARC records in cPanel\" href=\"\/support\/edu\/cpanel\/dmarc-setup\/\">How to Setup DMARC records in cPanel<\/a>.<\/p>\n<div class=\"alert alert-warning\" role=\"alert\"><b>IMPORTANT: <\/b><i>Each domain<\/i> used for sending emails through your server should have a valid SPF\/DKIM\/DMARC record.<\/div>\n<p>These common DNS records can help improve your outgoing email IP\u2019s reputation. They can also prevent your emails from being flagged as Spam. Ultimately, the decision of how to handle email is up to the configuration of the receiving server. Continuing through this article, you will learn how you can modify your server, to conform with the guidelines and policies set forth by many common email providers.<\/p>\n<h2>Changing Your Server&#8217;s Hostname<\/h2>\n<p>You may have noticed that your VPS or Dedicated server uses a <em>generic hostname<\/em> (vps####.inmotionhosting.com, ded###.inmotionhosting.com). The <strong>hostname<\/strong> is simply your server\u2019s name. When a mail server reviews the outgoing email IP address, it does so with the intent to authenticate the server\u2019s name. An <b>IP address Pointer<\/b> (<i>PTR<\/i>) record, associates your IP address with your server\u2019s hostname for this reason. In keeping with best practices, your mail server\u2019s hostname and outgoing mail IP PTR record should be customized and matching.<\/p>\n<p>Although there\u2019s already a <i>generic<\/i> PTR and <i>matching<\/i> hostname provisioned upon creating your server, most email providers will require that this is reconfigured to a <i>non-generic<\/i> hostname. For instance, you can change <i>vps####.inmotionhosting.com<\/i> to <i>server.example.com<\/i>, replacing <i>example.com<\/i> with your actual domain. Having a matching PTR record and (non-generic) hostname can increase your chances of emails being delivered successfully and also <strong>minimize emails filtered as Spam<\/strong>. Review the important notes and additional concerns below for tips on choosing your own hostname and making this transition smoothly.<\/p>\n<div class=\"alert alert-info\" role=\"alert\"><b>NOTE: <\/b>Your hostname will be viewable in every email header, so choose wisely.<\/div>\n<div class=\"alert alert-info\" role=\"alert\"><b>NOTE: <\/b>Your hostname must be in the format of a subdomain (server.example.com).<\/div>\n<div class=\"alert alert-info\" role=\"alert\"><b>NOTE: <\/b>Avoid choosing a subdomain that you are currently (or plan on) hosting in a cPanel account.<\/div>\n<div class=\"alert alert-info\" role=\"alert\"><b>NOTE: <\/b>Changing your hostname will require an update of the SSL Certificate for services (such as cPanel\/Webmail, FTP, Dovecot (SMTP\/IMAP), etc.).<\/div>\n<div class=\"alert alert-info\" role=\"alert\"><b>NOTE: <\/b>Changing your hostname will require an update to all references of the previous hostname in your connection(s) to the server (such as IMAP\/SMTP\/POP, FTP, and remote MySQL clients) with the new hostname.<\/div>\n<div class=\"alert alert-danger\" role=\"alert\"><b>WARNING: <\/b>If you <a title=\"Click here to navigate to our guide and learn how to change your hostname using the command line interface.\" href=\"https:\/\/www.inmotionhosting.com\/support\/server\/linux\/how-to-change-a-server-s-hostname-using-the-command-line-interface\/\">change your hostname from the command line<\/a>. The new hostname will remain as assigned until your server is restarted. In order for this change to persist through restarts, our Systems Administrator will need to update your hostname. Once you have changed the hostname in WHM, you can contact our Live Support to request an update to your hostname.<\/div>\n<div class=\"alert alert-warning\" role=\"alert\"><b>IMPORTANT: <\/b>Our Systems Administrator will need to update the <b>IP address Pointer (PTR) record<\/b> on your behalf. Once you have <a title=\"Click here to navigate to our guide and learn how to change your hostname using WHM.\" href=\"\/support\/edu\/whm\/how-to-change-your-server-s-hostname-using-whm\/\">changed the hostname in WHM<\/a>, you can <a class=\"alert-link\" title=\"Click here to navigate to our guide and learn how to submit a ticket.\" href=\"https:\/\/www.inmotionhosting.com\/support\/amp\/how-to-get-great-technical-support\/#submit-ticket\">submit a ticket<\/a> to request an update to your PTR.<\/div>\n\n\n<p>Learn more about cPanel management from our <a href=\"https:\/\/www.inmotionhosting.com\/support\/product-guides\/vps-hosting\/\">Managed VPS Hosting Product Guide<\/a>.<\/p>\n\n\n<div class=\"jumbotron\" style=\"text-align:center;\">\r\n<p style=\"font-size: 20px;\"><strong>Scalable VPS Infrastructure, Fully Managed<\/strong><\/p>\r\n<p>When shared hosting can't handle your traffic, VPS delivers dedicated resources that scale with demand. Our team manages the technical complexity while you manage your business.<\/p>\r\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/design.inmotionhosting.com\/assets\/icons\/standard\/check-blue.svg\" alt=\"check mark\" width=\"24\" height=\"24\" \/>NVMe Storage &nbsp;&nbsp; <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/design.inmotionhosting.com\/assets\/icons\/standard\/check-blue.svg\" alt=\"check mark\" width=\"24\" height=\"24\" \/>High-Availability &nbsp;&nbsp; <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/design.inmotionhosting.com\/assets\/icons\/standard\/check-blue.svg\" alt=\"check mark\" width=\"24\" height=\"24\" \/>Ironclad Security &nbsp;&nbsp; <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/design.inmotionhosting.com\/assets\/icons\/standard\/check-blue.svg\" alt=\"check mark\" width=\"24\" height=\"24\" \/>Premium Support<\/p>\r\n<p><a class=\"btn btn-primary btn-lg\" href=\"https:\/\/www.inmotionhosting.com\/vps-hosting?mktgp=t&irgwc=1&affiliates=5001860&utm_campaign=Jumbotron&utm_source=supportcenter&utm_medium=cta&utm_term=vps-cta2\">VPS Hosting<\/a><\/p>\r\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Many common email providers enforce guidelines and policies for sending\/receiving email. Typically, they will publish their acceptable use policies. For example, Google, Yahoo!, and AOL all provide best practices to help reduce the amount of Spam within their respective networks. By the end of this article, you will know how to configure your domain and<a class=\"moretag\" href=\"https:\/\/www.inmotionhosting.com\/support\/email\/configuring-your-vps-dedicated-server-as-a-mail-server\/\"> Read More ><\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-4122","post","type-post","status-publish","format-standard","hentry","category-email"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Configuring Your VPS or Dedicated Server as a Mail Server | InMotion Hosting<\/title>\n<meta name=\"description\" content=\"In this article, you will learn some best practices to consider when configuring your VSP or Dedicated 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