{"id":2572,"date":"2023-10-26T04:02:27","date_gmt":"2023-10-26T04:02:27","guid":{"rendered":"https:\/\/cheapsslweb.com\/resources\/?p=2572"},"modified":"2026-01-05T06:39:11","modified_gmt":"2026-01-05T06:39:11","slug":"how-to-solve-the-not-verified-error-in-outlook","status":"publish","type":"post","link":"https:\/\/cheapsslweb.com\/resources\/how-to-solve-the-not-verified-error-in-outlook","title":{"rendered":"Email Certificate Not Secure: How to Solve the &#8216;Not Verified&#8217; Error in Outlook"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Are you frequently encountering the frustrating &#8220;Not Verified&#8221; error in your Microsoft Outlook? Or have you been receiving security warnings or error messages stating that &#8211; &#8220;The server you are connected to is using a security certificate that cannot be verified,&#8221; or &#8220;email certificate is not secure,&#8221; or &#8220;Outlook certificate not trusted,&#8221; or Security certificate cannot be verified. If affirmative, then you are not alone.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">These Microsoft Outlook error messages have left many users scratching their heads. If you are one of such users, Fret Not! In this article, we will explore various steps you can take to fix the &#8211; &#8220;Outlook certificate error.&#8221; But before we begin exploring the possible solutions to fix the issue, let&#8217;s comprehend what this error is &amp; why it occurs.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/cheapsslweb.com\/email-identity\" aria-label=\"email-signing-cert-cta\"><img decoding=\"async\" width=\"960\" height=\"150\" src=\"https:\/\/cheapsslweb.com\/resources\/wp-content\/uploads\/2022\/12\/email-signing-cert-cta-jpg.webp\" alt=\"Buy Email Signing or S\/MIME Certificates at Cheapest Price\" class=\"wp-image-3157\" srcset=\"https:\/\/cheapsslweb.com\/resources\/wp-content\/uploads\/2022\/12\/email-signing-cert-cta-jpg.webp 960w, https:\/\/cheapsslweb.com\/resources\/wp-content\/uploads\/2022\/12\/email-signing-cert-cta-300x47.webp 300w, https:\/\/cheapsslweb.com\/resources\/wp-content\/uploads\/2022\/12\/email-signing-cert-cta-768x120.webp 768w\" sizes=\"(max-width: 960px) 100vw, 960px\" \/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">What is the Outlook Certificate Error?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Outlook security certificate errors typically appear when you attempt to connect to a mail server that is not secure. The error message or the security warning states that the server you are connected to is using a security certificate that cannot be verified.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Causes the Certificate Not Verified to Occur?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The Certificate Not Verified error can occur due to &#8220;n&#8221; number of reasons. Some of these reasons are listed below:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Blocked Ports:<\/strong> Blocked <a href=\"https:\/\/cheapsslweb.com\/blog\/what-is-ssl-certificate-port\">SSL Ports<\/a> in Outlook can result in a &#8220;not secure&#8221; email certificate error, preventing access to email accounts.<\/li>\n\n\n\n<li><strong>Incorrect Hostname:<\/strong> Incorrect hostname configuration is a common cause of Microsoft Outlook configuration errors. It may be due to a typing mistake or oversight during configuration.<\/li>\n\n\n\n<li><strong>Wrong Port Numbers:<\/strong> If incorrect port numbers are entered either in the mail server or in Outlook, this issue can pop up due to a mismatch of port numbers.<\/li>\n\n\n\n<li><strong>Certificate Name Mismatch: <\/strong>Mismatched certificate names between your Outlook and email server could be a cause of this error. Internet Service Providers<em> <\/em>occasionally change their server names, which could lead to this issue.<\/li>\n\n\n\n<li><strong>Inaccurate Time &amp; Date Settings: <\/strong>One of the reasons behind the unverified certificate error could be an overlooked issue &#8211; incorrect date and time settings on your computer.<\/li>\n\n\n\n<li><strong>Expired Outlook Security Certificate<\/strong>: An expired or out-of-date Outlook security certificate can also lead to a Not Verified error.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Resolve the Certificate Not Verified Error?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Here are some of the straightforward yet effective solutions to resolve this error:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Correct Certificate Name Mismatch<\/li>\n\n\n\n<li>Change the Outgoing SMTP Port<\/li>\n\n\n\n<li>Correct the Name of Your Domain<\/li>\n\n\n\n<li>Utilize the Domain Name of your Hosting as a Mail Server<\/li>\n\n\n\n<li>Use Insecure Ports<\/li>\n\n\n\n<li>Utilize Automatic Repair Tool &#8211; Remo Outlook PST<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Now, let&#8217;s examine each of these methods thoroughly.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Method 1: Correct Certificate Name Mismatch<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Follow the steps mentioned below to correct the certificate name mismatch:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>In the error dialog box, click <strong>View Certificate<\/strong>.<\/li>\n\n\n\n<li>Click the <strong>Issued to Name<\/strong> option.<\/li>\n\n\n\n<li>Edit the name so that the name mentioned in the <strong>Issued to Name<\/strong> section is the same as the mail server.<\/li>\n\n\n\n<li><strong>Restart<\/strong> the application to check whether the issue exists.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Method 2: Change the Outgoing SMTP Port<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Follow the steps mentioned below to change the outgoing SMTP (Simple Mail Transfer Protocol) port:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Click <strong>Search<\/strong>, placed on the taskbar.<\/li>\n\n\n\n<li>Type <strong>Microsoft Outlook<\/strong> and press Enter.<\/li>\n\n\n\n<li>The <strong>Microsoft Outlook<\/strong> window will appear.<\/li>\n\n\n\n<li>In the <strong>Outlook<\/strong> window, click <strong>File<\/strong>.<\/li>\n\n\n\n<li>In the left pane, click <strong>Info<\/strong>.<\/li>\n\n\n\n<li>In the right pane, click the <strong>Account Settings<\/strong> icon.<\/li>\n\n\n\n<li>From the list, select the <strong>Account Settings<\/strong> option.<\/li>\n\n\n\n<li>Select your <strong>email account<\/strong> and click <strong>Change<\/strong>.<\/li>\n\n\n\n<li>The<strong> Change Account<\/strong> dialog box will appear.<\/li>\n\n\n\n<li>In the Change Account dialog box, click <strong>More Settings<\/strong>.<\/li>\n\n\n\n<li>The <strong>Internet E-mail Settings<\/strong> window will appear.<\/li>\n\n\n\n<li>In the <strong>Internet E-mail Settings<\/strong> window, click on the <strong>Advanced<\/strong> tab.<\/li>\n\n\n\n<li>Under the <strong>Server Port Numbers<\/strong> sections, change the <strong>Outgoing server (SMTP)<\/strong> field entry from 25 to some other port.<\/li>\n\n\n\n<li>Click <strong>OK<\/strong>.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Method 3: Correct the Name of Your Domain<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Follow the steps mentioned below to correct the name of your domain:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Access your <strong>email server configuration settings<\/strong>.<\/li>\n\n\n\n<li>Look for the <strong>SSL\/TLS settings<\/strong> in the mail settings.<\/li>\n\n\n\n<li>Note the <strong>domains for incoming and outgoing servers<\/strong> and the listed POP3, IMAP, and SMTP ports.<\/li>\n\n\n\n<li>Click <strong>Search<\/strong>, placed on the taskbar.<\/li>\n\n\n\n<li>Type <strong>Microsoft Outlook <\/strong>and press Enter.<\/li>\n\n\n\n<li>The <strong>Microsoft Outlook<\/strong> window will appear.<\/li>\n\n\n\n<li>In the Outlook window, click <strong>File<\/strong>.<\/li>\n\n\n\n<li>In the left pane, click <strong>Info<\/strong>.<\/li>\n\n\n\n<li>In the right pane, click the <strong>Account Settings<\/strong> icon.<\/li>\n\n\n\n<li>Double-click on the <strong>email ID<\/strong> you wish to configure.<\/li>\n\n\n\n<li>Update the <strong>incoming and outgoing domains<\/strong> with the ones you noted earlier.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Method 4: Utilize the Domain Name of your Hosting as a Mail Server<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Hosting providers may host numerous domains on a shared server. It can raise security concerns and issues like our discussion, as the SSL cert is not renewed for every domain. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>To bypass or avoid this<\/strong>, use the domain name of your hosting provider as the &#8220;mail server&#8221; (error.myhostingdomain.com). (Instead of using your &#8220;domain name&#8221; (error.mydomain.com)).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Method 5: Use Insecure Ports<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Some institutions, like schools and businesses, block popular mail servers&#8217; ports (such as POP 995, IMAP 993, and SMTP 465) for security reasons. You can use non-SSL ports (POP 110, IMAP 143, SMTP 587, etc.) to work around this. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Also Read:<\/strong> <a href=\"https:\/\/cheapsslweb.com\/blog\/what-is-port-8080-http-port-80-vs-8080-vs-443-difference\/\">Port 80 vs 8080 vs 443 Difference Explained<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">However, it is not recommended to use this option as it causes a security risk and may lead to cyberattacks like <a href=\"https:\/\/cheapsslweb.com\/blog\/what-is-a-data-breach-7-most-common-causes-of-data-breach\/\">data breaches<\/a>, etc.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Method 6: Utilize Automatic Repair Tool &#8211; Remo Outlook PST<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Follow the steps mentioned below to utilize the automatic repair tool &#8211; Remo Outlook PST:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Open a fresh tab in <strong>Chrome<\/strong>.<\/li>\n\n\n\n<li>In the <strong>URL<\/strong> bar, type <strong>https:\/\/www.remosoftware.com\/thank-you-for-downloading-ro<\/strong> and press Enter.<\/li>\n\n\n\n<li><strong>Download &amp; install<\/strong> the repair tool by following the onscreen instructions.<\/li>\n\n\n\n<li>Open the <strong>Remo PST Repair<\/strong> tool.<\/li>\n\n\n\n<li>The <strong>Remo Repair Outlook [PST]<\/strong> dialog box will appear.<\/li>\n\n\n\n<li>Click the radio button in front of the <strong>Open Default PST File<\/strong> option.<\/li>\n\n\n\n<li>On the next page, click the radio button before the <strong>Normal Scan<\/strong> option.<\/li>\n\n\n\n<li>Click Browse to select the destination for creating the new <strong>PST<\/strong> file.<\/li>\n\n\n\n<li>Click <strong>Repair<\/strong>.<\/li>\n\n\n\n<li>Save the repaired <strong>PST<\/strong> file.<\/li>\n\n\n\n<li><strong>Import<\/strong> the repaired PST file into <strong>Outlook<\/strong> and verify whether the issue persists.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">If you still face frustrating Outlook security certificate errors despite trying the above methods, don&#8217;t worry. Contact our team and get assistance from our team, consisting of experts who have more than a decade of experience in handling <a href=\"https:\/\/cheapsslweb.com\/blog\/troubleshooting-most-common-ssl-errors\/\">SSL certificate-related issues<\/a>.<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\"><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Are you frequently encountering the frustrating &#8220;Not Verified&#8221; error in your Microsoft Outlook? Or have you been receiving security warnings or error messages stating that &#8211; &#8220;The server you are connected to is using a security certificate that cannot be verified,&#8221; or &#8220;email certificate is not secure,&#8221; or &#8220;Outlook certificate not trusted,&#8221; or Security certificate<span class=\"morelink d-block mt-3\"><a href=\"https:\/\/cheapsslweb.com\/resources\/how-to-solve-the-not-verified-error-in-outlook\">Read More<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":2583,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[477,478,186],"class_list":["post-2572","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-email-encryption-security","tag-certificate-not-verified-error-outlook","tag-outlook-certificate-error","tag-outlook-security","entry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Outlook Certificate Error: How to Fix Not Verified Error in Outlook?<\/title>\n<meta name=\"description\" content=\"Discover actionable tips and solutions to resolve the &#039;Not Verified&#039; 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