{"id":16139,"date":"2026-04-20T14:02:04","date_gmt":"2026-04-20T13:02:04","guid":{"rendered":"https:\/\/siite.dk\/?p=16139"},"modified":"2026-04-20T14:02:04","modified_gmt":"2026-04-20T13:02:04","slug":"e-mail-deliverability","status":"publish","type":"post","link":"https:\/\/siite.dk\/en\/marketingordbog\/e-mail-deliverability\/","title":{"rendered":"E-mail deliverability"},"content":{"rendered":"

What is email deliverability?<\/h2>\n\n\n\n

Email deliverability is all about how well your emails actually reach the recipient's inbox. It's not enough for an email to be sent from your system.

It should also be accepted by the recipient's mail server and preferably end up in the main inbox rather than in spam, advertising tabs or be rejected completely.<\/p>\n\n\n\n

The term is especially used in email marketing, newsletters, automated flows and transactional emails. For businesses, good deliverability is crucial because even the best content loses value if the recipient never sees it.<\/p>\n\n\n\n

Email deliverability can be described as email deliverability or the ability to get emails to the inbox. In practice, it covers a combination of technology, sender reputation, content quality and recipient behaviour.<\/p>\n\n\n\n

<\/div>\n\n\n\n

Why is email deliverability important?<\/h2>\n\n\n\n

If your emails are not delivered correctly, it affects your visibility, your revenue and your communication. Low deliverability can mean fewer opens, fewer clicks and lower conversion.<\/p>\n\n\n\n

For many organisations, email is a key channel for building relationships, selling products and retaining customers. Therefore, deliverability is not just a technical issue.

It is also an important business area with a direct impact on results.<\/p>\n\n\n\n

  • Newsletters get a wider reach<\/li>
  • Automated emails reach the right recipients<\/li>
  • Campaigns perform better<\/li>
  • Improve the customer experience<\/li>
  • You protect your sender reputation in the long run<\/li><\/ul>\n\n\n\n

    Especially in webshop operations and lead generation, it's critical that order confirmations, welcome emails, offers and follow-ups are delivered smoothly. Even small drops in deliverability can have big consequences over time.<\/p>\n\n\n\n

    <\/div>\n\n\n\n

    The difference between delivery, deliverability and inbox placement<\/h2>\n\n\n\n

    The terms are often confused, but they don't mean exactly the same thing. It's important to distinguish between them if you want to understand email deliverability correctly.<\/p>\n\n\n\n

    <\/div>\n\n\n\n

    Delivery<\/h3>\n\n\n\n

    Delivery means that the mail server has accepted your email. This means that the email has technically been delivered to the recipient's system.

    However, it doesn't say anything about where the email ended up.<\/p>\n\n\n\n

    <\/div>\n\n\n\n

    Deliverability<\/h3>\n\n\n\n

    Deliverability refers to the likelihood that your email will land in the inbox and not be filtered out. This is where the quality of your sending practices becomes crucial.<\/p>\n\n\n\n

    <\/div>\n\n\n\n

    Inbox placement<\/h3>\n\n\n\n

    Inbox placement is more precisely about where the email is placed. Is it in the primary inbox, campaign tab, spam folder or another category?

    It's often this part that has the biggest impact on whether the recipient actually sees and reads your email.<\/p>\n\n\n\n

    A company can therefore have high deliverability but still poor deliverability if many emails end up in spam. This is an important distinction when working with email marketing.<\/p>\n\n\n\n

    <\/div>\n\n\n\n

    What factors affect email deliverability?<\/h2>\n\n\n\n

    There are many elements that affect whether your emails make it to the inbox. Some are technical, while others are about behaviour, data hygiene and content.<\/p>\n\n\n\n

    • Sender domain reputation<\/li>
    • IP reputation<\/li>
    • Correctly set up SPF, DKIM and DMARC<\/li>
    • Recipient engagement<\/li>
    • The quality of your recipient list<\/li>
    • Frequency and volume of broadcasts<\/li>
    • Content relevance and credibility<\/li>
    • Spam complaints and unsubscriptions<\/li><\/ul>\n\n\n\n

      Mail providers such as Gmail, Outlook and Yahoo continuously evaluate your emails based on a wide range of signals. For example, they look at how recipients react to your messages and whether your technical setup seems trustworthy.<\/p>\n\n\n\n

      That's why good email deliverability requires a concerted effort. You can't solve the problem with better subject lines alone or with technical changes alone.

      Both need to work together.<\/p>\n\n\n\n

      <\/div>\n\n\n\n

      Technical setup and authentication<\/h2>\n\n\n\n

      The technical setup is the foundation for high deliverability. If your domains and mail servers are not configured correctly, your emails can quickly be deemed suspicious.<\/p>\n\n\n\n

      <\/div>\n\n\n\n

      SPF<\/h3>\n\n\n\n

      SPF tells which servers are allowed to send emails on behalf of your domain. This helps prevent spoofing and makes it easier for the recipient's server to validate the sender.<\/p>\n\n\n\n

      <\/div>\n\n\n\n

      DKIM<\/h3>\n\n\n\n

      DKIM adds a digital signature to your emails. It confirms that the content hasn't been altered along the way and increases confidence that the email is actually coming from the right sender.<\/p>\n\n\n\n

      <\/div>\n\n\n\n

      DMARC<\/h3>\n\n\n\n

      DMARC builds on top of SPF and DKIM and provides clear instructions to the recipient's server on how to handle emails that do not pass validation. At the same time, DMARC provides reports that make it easier to monitor domain abuse.<\/p>\n\n\n\n

      When these three elements are set up correctly, you send a strong signal of legitimacy. It's not a guarantee of perfect email deliverability, but it's a necessary condition.<\/p>\n\n\n\n

      <\/div>\n\n\n\n

      Sender reputation and domain credibility<\/h2>\n\n\n\n

      Your sender reputation acts as a kind of credit rating in the email world. If you send relevant emails to engaged recipients over time, you build a positive reputation.<\/p>\n\n\n\n

      However, if you send to outdated lists, receive many spam complaints or experience high bounce rates, your reputation will suffer. This can lead to lower inbox rankings or outright blocking.<\/p>\n\n\n\n

      Reputation is affected at both the domain and IP level. If you use a shared email platform, the practices of others can sometimes also have an indirect impact, although most reputable platforms actively work to protect their infrastructure.<\/p>\n\n\n\n

      • Keep broadcasts stable and predictable<\/li>
      • Avoid sudden large jumps in volume<\/li>
      • Remove invalid or inactive addresses<\/li>
      • Only send to people with genuine consent<\/li>
      • Monitor bounce, complaints and engagement continuously<\/li><\/ul>\n\n\n\n
        <\/div>\n\n\n\n

        The importance of content for deliverability<\/h2>\n\n\n\n

        While technique is important, content also plays a big role. Email providers not only assess who you are, but also what you send and how recipients respond to it.<\/p>\n\n\n\n

        If your emails appear misleading, aggressive or irrelevant, it increases the risk of low opens, quick deletion or spam flags. It sends negative signals to systems.<\/p>\n\n\n\n

        <\/div>\n\n\n\n

        Typical content issues<\/h3>\n\n\n\n
        • Excessive sales messages and clickbait subject lines<\/li>
        • Too many links or suspicious URLs<\/li>
        • Poor balance between text and images<\/li>
        • Missing unsubscribe link<\/li>
        • Unclear sender name<\/li>
        • Content that does not match the recipient's expectations<\/li><\/ul>\n\n\n\n

          Good email deliverability is closely linked to relevance. When the recipient recognises the sender and perceives value in the content, engagement is higher and this strengthens your future broadcasts.<\/p>\n\n\n\n

          <\/div>\n\n\n\n

          Recipient list, consent and data hygiene<\/h2>\n\n\n\n

          The quality of your email list is one of the most crucial factors for deliverability. A big list is not necessarily a good list.

          It's far more important that the recipients actually want to hear from you.<\/p>\n\n\n\n

          If you send to old, purchased or poorly maintained lists, you increase the risk of hard bounces, spam traps and complaints. This can significantly damage your sender performance.<\/p>\n\n\n\n

          <\/div>\n\n\n\n

          Good practice for lists<\/h3>\n\n\n\n
          • Use double opt-in whenever possible<\/li>
          • Only collect emails with clear consent<\/li>
          • Continuously clean lists of invalid addresses<\/li>
          • Segment active and inactive recipients<\/li>
          • Reactivate or remove recipients who never engage<\/li><\/ul>\n\n\n\n

            Data hygiene is not only relevant for compliance and GDPR. It's also a key tool for improving email deliverability and ensuring better results from your campaigns.<\/p>\n\n\n\n

            <\/div>\n\n\n\n

            How do you measure email deliverability?<\/h2>\n\n\n\n

            Deliverability cannot be judged by a single metric. Instead, you should look at several metrics together to get a realistic picture of how your emails are performing.<\/p>\n\n\n\n

            • Delivery rate<\/li>
            • Bounce rate<\/li>
            • Open rate<\/li>
            • Click rate<\/li>
            • Spam complaint rate<\/li>
            • Cancellation rate<\/li>
            • Inbox placement tests<\/li>
            • Domain and IP reputation<\/li><\/ul>\n\n\n\n

              Low open rates can be a sign of poor delivery quality, but it can also be due to weak subject lines or lack of relevance. Therefore, the numbers should always be interpreted in context.<\/p>\n\n\n\n

              Many companies also use specialised tools to monitor spam location, blocklists and technical authentication. This gives a more accurate picture of what's affecting their email deliverability.<\/p>\n\n\n\n

              <\/div>\n\n\n\n

              Typical causes of poor deliverability<\/h2>\n\n\n\n

              When emails fail to land in the inbox, it's often due to a combination of issues. Rarely does a single error alone explain a drop in performance.<\/p>\n\n\n\n

              • Missing or incorrectly set up SPF, DKIM and DMARC<\/li>
              • Too high a proportion of invalid email addresses<\/li>
              • Purchased or shared mailing lists<\/li>
              • Many spam tags<\/li>
              • Sudden increases in broadcast volume<\/li>
              • Low engagement over a longer period of time<\/li>
              • Content that appears to be spam<\/li>
              • Inadequate segmentation<\/li><\/ul>\n\n\n\n

                It is therefore important to work systematically with strategy, technique and content. The earlier you recognise problems, the easier they are usually to correct.<\/p>\n\n\n\n

                <\/div>\n\n\n\n

                How to improve your email deliverability<\/h2>\n\n\n\n

                If you want to improve your results, you should work with email deliverability as an ongoing process. It's about building trust with both email providers and recipients.<\/p>\n\n\n\n

                • Set up and control SPF, DKIM and DMARC<\/li>
                • Use a clear and recognisable sender name<\/li>
                • Send only to recipients with consent<\/li>
                • Clean and segment your lists continuously<\/li>
                • Start carefully with new domains or large broadcasts<\/li>
                • Create relevant content with clear value<\/li>
                • Test subject lines, frequency and segments<\/li>
                • Monitor key metrics and react quickly to alerts<\/li><\/ul>\n\n\n\n

                  A good piece of advice is to focus on quality over quantity. Fewer, more relevant mailings to engaged recipients often provide better deliverability than frequent mass mailings to broad lists.<\/p>\n\n\n\n

                  It can also be beneficial to send different types of emails from separate subdomains. That way, marketing emails and transactional emails can be handled in a more controlled way.<\/p>\n\n\n\n

                  <\/div>\n\n\n\n

                  Email deliverability in marketing and customer communication<\/h2>\n\n\n\n

                  In marketing, deliverability is closely linked to campaign performance. When more emails reach the inbox, the chances of opens, clicks and sales increase.<\/p>\n\n\n\n

                  In customer communication, the importance is at least as great. Receipts, password resets, booking confirmations and support emails need to arrive quickly and securely.

                  If they don't, it directly affects customer trust.<\/p>\n\n\n\n

                  That's why email deliverability shouldn't just be the responsibility of the marketing department. IT, customer service, CRM managers and management also have a role in ensuring stable and reliable email flows.<\/p>\n\n\n\n

                  <\/div>\n\n\n\n

                  Why email deliverability is relevant for Danish companies<\/h2>\n\n\n\n

                  Danish companies use email widely for both B2B and B2C. From newsletters and offers to order confirmations and automated customer experiences.<\/p>\n\n\n\n

                  When competition in the inbox is high, deliverability becomes a real competitive advantage. Companies that take a structured approach to consent, segmentation and technical set-up are stronger than those that simply focus on sending as much as possible.<\/p>\n\n\n\n

                  At the same time, legislation, consumer expectations and platform requirements are placing greater demands on responsible communication. As a result, email deliverability is no longer a niche concept, but a central theme in modern digital marketing.<\/p>\n\n\n\n

                  <\/div>\n\n\n\n

                  Summarising<\/h2>\n\n\n\n

                  Email deliverability describes how effectively your emails are delivered to the recipient's inbox. It's not just about sending an email, but making sure it is seen and received in the right context.<\/p>\n\n\n\n

                  Good deliverability requires proper technical setup, strong sender reputation, healthy email lists and relevant content. When these elements work together, you improve reach, engagement and business value.<\/p>\n\n\n\n

                  For companies that are serious about email marketing and digital customer communication, email deliverability is an area that deserves constant attention. It is a fundamental prerequisite for your email strategy to work in practice.<\/p>","protected":false},"excerpt":{"rendered":"

                  <\/p>\n

                  Email deliverability is about much more than just sending an email. It's whether the message actually lands in the inbox and is seen by the recipient.<\/p>\n

                  <\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":"","_seopress_titles_title":"Hvad er e-mail deliverability og hvorfor vigtigt?","_seopress_titles_desc":"Hvad er e-mail deliverability? L\u00e6r hvorfor leveringssikkerhed er afg\u00f8rende for, at dine mails lander i indbakken og skaber resultater.","_seopress_robots_index":"","footnotes":""},"categories":[8],"tags":[],"class_list":["post-16139","post","type-post","status-publish","format-standard","hentry","category-marketingordbog"],"acf":[],"_links":{"self":[{"href":"https:\/\/siite.dk\/en\/wp-json\/wp\/v2\/posts\/16139","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/siite.dk\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/siite.dk\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/siite.dk\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/siite.dk\/en\/wp-json\/wp\/v2\/comments?post=16139"}],"version-history":[{"count":1,"href":"https:\/\/siite.dk\/en\/wp-json\/wp\/v2\/posts\/16139\/revisions"}],"predecessor-version":[{"id":16854,"href":"https:\/\/siite.dk\/en\/wp-json\/wp\/v2\/posts\/16139\/revisions\/16854"}],"wp:attachment":[{"href":"https:\/\/siite.dk\/en\/wp-json\/wp\/v2\/media?parent=16139"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/siite.dk\/en\/wp-json\/wp\/v2\/categories?post=16139"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/siite.dk\/en\/wp-json\/wp\/v2\/tags?post=16139"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}