{"id":35037,"date":"2026-07-16T09:25:41","date_gmt":"2026-07-16T09:25:41","guid":{"rendered":"https:\/\/1grid.co.za\/knowledge\/?post_type=ht_kb&#038;p=35037"},"modified":"2026-07-16T09:25:42","modified_gmt":"2026-07-16T09:25:42","slug":"outlook-downloading-duplicate-emails-how-to-fix-1-grid","status":"publish","type":"ht_kb","link":"https:\/\/1grid.co.za\/knowledge\/outlook-downloading-duplicate-emails-how-to-fix-1-grid\/","title":{"rendered":"Outlook Downloading Duplicate Emails: How To Fix | 1-grid\u00a0"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">It can be concerning when Outlook keeps downloading duplicate emails because receiving the same email multiple times can quickly clutter your inbox and make it difficult to manage your messages. Fortunately, this issue is usually caused by Outlook configuration, POP3 settings, synchronisation behaviour, or antivirus software rather than a problem with your mailbox.\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This guide will help you troubleshoot why Microsoft Outlook is downloading duplicate email messages when using your 1-grid email account.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">By following the steps below, you can\u00a0identify\u00a0the most common causes and prevent duplicate emails from continuing to download.\u00a0<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1600\" height=\"600\" src=\"https:\/\/1grid.co.za\/knowledge\/wp-content\/uploads\/2026\/07\/1-grid-Images-for-KB-Articles-1000-x-600-px-72.png\" alt=\"Why Does Outlook Keep Downloading Duplicate Emails? | 1-grid\u00a0\" class=\"wp-image-35039\"\/><\/figure>\n<\/div>\n\n\n<div class=\"wp-block-ht-block-toc is-style-rounded htoc htoc--position-wide toc-list-style-plain\" data-htoc-state=\"expanded\"><span class=\"htoc__title\"><span class=\"ht_toc_title\">Quick Links<\/span><span class=\"htoc__toggle\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"16\" height=\"16\"><g fill=\"#444\"><path d=\"M15 7H1c-.6 0-1 .4-1 1s.4 1 1 1h14c.6 0 1-.4 1-1s-.4-1-1-1z\"><\/path><path d=\"M15 1H1c-.6 0-1 .4-1 1s.4 1 1 1h14c.6 0 1-.4 1-1s-.4-1-1-1zM15 13H1c-.6 0-1 .4-1 1s.4 1 1 1h14c.6 0 1-.4 1-1s-.4-1-1-1z\"><\/path><\/g><\/svg><\/span><\/span><div class=\"htoc__itemswrap\"><ul class=\"ht_toc_list\"><li class=\"\"><a href=\"#htoc-step-by-step-instructions\">Steps to Prevent Outlook From Downloading Duplicate Emails \u00a0<\/a><ul class=\"ht_toc_child_list\"><li class=\"\"><a href=\"#htoc-step-1-identify-whether-you-re-using-pop3-or-imap\">Step 1:&nbsp;Identify&nbsp;Whether You&#8217;re Using POP3 or IMAP&nbsp;<\/a><\/li><li class=\"\"><a href=\"#htoc-step-2-avoid-synchronising-while-emptying-deleted-items\">Step 2: Avoid Synchronising While Emptying Deleted Items&nbsp;<\/a><\/li><li class=\"\"><a href=\"#htoc-step-3-check-for-multiple-pop3-accounts\">Step 3: Check for Multiple POP3 Accounts&nbsp;<\/a><\/li><li class=\"\"><a href=\"#htoc-step-4-review-send-receive-settings\">Step 4: Review Send\/Receive Settings&nbsp;<\/a><\/li><li class=\"\"><a href=\"#htoc-step-5-check-your-antivirus-software\">Step 5: Check Your Antivirus Software&nbsp;<\/a><\/li><li class=\"\"><a href=\"#htoc-step-6-remove-corrupted-messages-from-the-mail-server\">Step 6: Remove Corrupted Messages from the Mail Server&nbsp;<\/a><\/li><li class=\"\"><a href=\"#htoc-step-7-restart-outlook\">Step 7: Restart Outlook&nbsp;<\/a><\/li><\/ul><\/li><\/ul><\/div><\/div>\n\n\n\n<h2 id=\"htoc-what-this-means\" class=\"wp-block-heading\"><strong>What This Means<\/strong>&nbsp;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Duplicate emails occur when Outlook downloads the same message from the mail server more than once instead of recognising that it has already been received.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This behaviour most commonly affects&nbsp;<strong>POP3 email accounts<\/strong>, although it can also occur due to Outlook profile configuration or security software.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Common causes include:\u00a0<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li id=\"htoc-pop3-synchronisation-timing\">POP3 synchronisation timing\u00a0\u00a0<\/li>\n\n\n\n<li id=\"htoc-multiple-pop3-accounts-pointing-to-the-same-mailbox\">Multiple POP3 accounts pointing to the same mailbox\u00a0\u00a0<\/li>\n\n\n\n<li id=\"htoc-outlook-send-receive-configuration\">Outlook Send\/Receive configuration\u00a0\u00a0<\/li>\n\n\n\n<li id=\"htoc-antivirus-software-scanning-email\">Antivirus software scanning email\u00a0\u00a0<\/li>\n\n\n\n<li id=\"htoc-corrupted-messages-remaining-on-the-mail-server\">Corrupted messages\u00a0remaining\u00a0on the mail server\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The issue is typically related to the email application rather than your 1-grid mailbox.\u00a0<\/p>\n\n\n\n<h2 id=\"htoc-step-by-step-instructions\" class=\"wp-block-heading\"><strong>Steps to Prevent Outlook From Downloading Duplicate Emails <\/strong>\u00a0<\/h2>\n\n\n\n<h6 id=\"htoc-step-1-identify-whether-you-re-using-pop3-or-imap\" class=\"wp-block-heading\"><strong>Step 1:&nbsp;Identify&nbsp;Whether You&#8217;re Using POP3 or IMAP<\/strong>&nbsp;<\/h6>\n\n\n\n<p class=\"wp-block-paragraph\">Duplicate downloads are&nbsp;most commonly associated&nbsp;with&nbsp;<strong>POP3<\/strong>&nbsp;email accounts.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>To check your account type:\u00a0<\/strong><\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li id=\"htoc-open-outlook\">Open Outlook.\u00a0\u00a0<\/li>\n<\/ol>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li id=\"htoc-go-to-file-account-settings\">Go to\u00a0<strong>File<\/strong>\u00a0>\u00a0<strong>Account Settings<\/strong>.\u00a0\u00a0<\/li>\n<\/ol>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li id=\"htoc-select-your-email-account\">Select your email account.\u00a0\u00a0<\/li>\n<\/ol>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li id=\"htoc-check-whether-it-is-configured-as-pop3-or-imap\">Check whether it is configured as\u00a0<strong>POP3<\/strong>\u00a0or\u00a0<strong>IMAP<\/strong>.\u00a0\u00a0<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">If\u00a0you&#8217;re\u00a0using IMAP, duplicate downloads are less common and may\u00a0indicate\u00a0another issue.\u00a0<\/p>\n\n\n\n<h6 id=\"htoc-step-2-avoid-synchronising-while-emptying-deleted-items\" class=\"wp-block-heading\"><strong>Step 2: Avoid Synchronising While Emptying Deleted Items<\/strong>&nbsp;<\/h6>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>If your POP3 account is configured to:\u00a0<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li id=\"htoc-leave-a-copy-of-messages-on-the-server-and\">Leave a copy of messages on the server, and\u00a0\u00a0<\/li>\n\n\n\n<li id=\"htoc-remove-messages-when-they-are-deleted-from-the-deleted-items-folder\">Remove messages when they are\u00a0deleted\u00a0from the Deleted Items folder,\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Outlook may occasionally download messages again if synchronisation occurs while Deleted Items is being emptied.\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>If this happens:\u00a0<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li id=\"htoc-wait-for-send-receive-to-finish-before-emptying-deleted-items\">Wait for Send\/Receive to finish before emptying Deleted Items.\u00a0\u00a0<\/li>\n\n\n\n<li id=\"htoc-delete-any-duplicate-emails-that-have-already-downloaded\">Delete any duplicate emails that have already downloaded.\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">This behaviour is caused by Outlook&#8217;s synchronisation process and does not normally\u00a0indicate\u00a0a mailbox problem.\u00a0<\/p>\n\n\n\n<h6 id=\"htoc-step-3-check-for-multiple-pop3-accounts\" class=\"wp-block-heading\"><strong>Step 3: Check for Multiple POP3 Accounts<\/strong>&nbsp;<\/h6>\n\n\n\n<p class=\"wp-block-paragraph\">If your Outlook profile\u00a0contains\u00a0two <a href=\"https:\/\/1grid.co.za\/knowledge\/what-is-the-difference-between-imap-and-pop\/#htoc-11111\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>POP3<\/strong><\/a> accounts that connect to the same mailbox, duplicate emails may occur.\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>To review your Send\/Receive settings:\u00a0<\/strong><\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li id=\"htoc-open-outlook1\">Open Outlook.\u00a0\u00a0<\/li>\n<\/ol>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li id=\"htoc-select-send-receive\">Select\u00a0<strong>Send\/Receive<\/strong>.\u00a0\u00a0<\/li>\n<\/ol>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li id=\"htoc-open-send-receive-groups\">Open\u00a0<strong>Send\/Receive Groups<\/strong>.\u00a0\u00a0<\/li>\n<\/ol>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li id=\"htoc-review-the-configured-accounts\">Review the configured accounts.\u00a0\u00a0<\/li>\n<\/ol>\n\n\n\n<ol start=\"5\" class=\"wp-block-list\">\n<li id=\"htoc-if-two-accounts-reference-the-same-mailbox-disable-automatic-receiving-on-one-of-them\">If two accounts reference the same mailbox, disable automatic receiving on one of them.\u00a0\u00a0<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">This prevents Outlook from downloading the same email twice.\u00a0<\/p>\n\n\n\n<h6 id=\"htoc-step-4-review-send-receive-settings\" class=\"wp-block-heading\"><strong>Step 4: Review Send\/Receive Settings<\/strong>&nbsp;<\/h6>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>If\u00a0you&#8217;re\u00a0using Outlook with offline folders or older POP3 configurations:\u00a0<\/strong><\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li id=\"htoc-open-send-receive-groups1\">Open\u00a0<strong>Send\/Receive Groups<\/strong>.\u00a0\u00a0<\/li>\n<\/ol>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li id=\"htoc-edit-the-pop3-account\">Edit the POP3 account.\u00a0\u00a0<\/li>\n<\/ol>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li id=\"htoc-ensure-download-complete-item-including-attachments-is-enabled\">Ensure\u00a0<strong>Download Complete Item Including Attachments<\/strong>\u00a0is enabled.\u00a0\u00a0<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">This helps prevent duplicate message headers during synchronisation.\u00a0<\/p>\n\n\n\n<h6 id=\"htoc-step-5-check-your-antivirus-software\" class=\"wp-block-heading\"><strong>Step 5: Check Your Antivirus Software<\/strong>&nbsp;<\/h6>\n\n\n\n<p class=\"wp-block-paragraph\">Some antivirus applications scan incoming email before Outlook receives it.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If scanning takes too long, particularly for large emails, the mail server may not receive confirmation that the message was downloaded successfully.\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As a result, Outlook downloads the same email repeatedly.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>If duplicate downloads begin after installing or updating antivirus software:\u00a0<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li id=\"htoc-review-the-email-scanning-settings\">Review the email scanning settings.\u00a0\u00a0<\/li>\n\n\n\n<li id=\"htoc-temporarily-disable-email-scanning-for-testing-purposes-if-appropriate\">Temporarily disable email scanning for testing purposes (if\u00a0appropriate).\u00a0\u00a0<\/li>\n\n\n\n<li id=\"htoc-re-enable-protection-after-testing\">Re-enable protection after testing.\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\n<h6 id=\"htoc-step-6-remove-corrupted-messages-from-the-mail-server\" class=\"wp-block-heading\"><strong>Step 6: Remove Corrupted Messages from the Mail Server<\/strong>&nbsp;<\/h6>\n\n\n\n<p class=\"wp-block-paragraph\">Occasionally, a damaged or unusually large email can repeatedly download.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>If you suspect a specific email is causing the problem:\u00a0<\/strong><\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li id=\"htoc-log-in-to-webmail\">Log in to <a href=\"https:\/\/1grid.co.za\/knowledge\/how-to-access-your-email-via-webmail\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Webmail<\/strong><\/a>.\n<ul class=\"wp-block-list\">\n<li id=\"htoc-log-in-to-webmail1\"><a href=\"https:\/\/1grid.co.za\/knowledge\/how-to-access-webmail-email-via-cpanel\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Accessing Webmail via cPanel\u00a0\u00a0<\/strong><\/a><\/li>\n\n\n\n<li id=\"htoc-log-in-to-webmail11\"><a href=\"https:\/\/1grid.co.za\/knowledge\/how-to-access-webmail-in-windows-plesk\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Accessing Webmail via Plesk<\/strong><\/a><\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li id=\"htoc-locate-the-problematic-message\">Locate the problematic message.\u00a0\u00a0<\/li>\n<\/ol>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li id=\"htoc-delete-it-or-move-it-to-another-folder\">Delete it or move it to another folder.\u00a0\u00a0<\/li>\n<\/ol>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li id=\"htoc-restart-outlook-and-perform-send-receive-again\">Restart Outlook and perform Send\/Receive again.\u00a0\u00a0<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">If multiple corrupted messages exist, clearing them from the server may resolve the issue.\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>IMPORTANT:<\/strong>\u00a0Make sure you have already downloaded any important emails before\u00a0deleting\u00a0messages from the server.\u00a0<\/p>\n\n\n\n<h6 id=\"htoc-step-7-restart-outlook\" class=\"wp-block-heading\"><strong>Step 7: Restart Outlook<\/strong>&nbsp;<\/h6>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>After making changes:\u00a0<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li id=\"htoc-close-outlook-completely\">Close Outlook completely.\u00a0\u00a0<\/li>\n\n\n\n<li id=\"htoc-reopen-the-application\">Reopen the application.\u00a0\u00a0<\/li>\n\n\n\n<li id=\"htoc-perform-a-manual-send-receive\">Perform a manual Send\/Receive.\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>IMPORTANT: <\/strong>Monitor whether duplicate emails continue downloading.\u00a0<\/p>\n\n\n\n<h2 id=\"htoc-important-things-to-know\" class=\"wp-block-heading\"><strong>Important Things to Know<\/strong>&nbsp;<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li id=\"htoc-duplicate-emails-usually-occur-with-pop3-rather-than-imap-accounts\">Duplicate emails usually occur with POP3 rather than IMAP accounts.\u00a0\u00a0<\/li>\n\n\n\n<li id=\"htoc-the-issue-is-generally-caused-by-outlook-or-local-software-rather-than-the-mail-server\">The issue is\u00a0generally caused\u00a0by Outlook or local software rather than the mail server.\u00a0\u00a0<\/li>\n\n\n\n<li id=\"htoc-antivirus-email-scanning-is-a-common-contributor\"><a href=\"https:\/\/www.google.com\/search?q=Antivirus+email+scanning&amp;sca_esv=9372fb16b545f228&amp;rlz=1C1GCEA_enZA1173ZA1204&amp;biw=1536&amp;bih=776&amp;sxsrf=APpeQnukKWj6ziGkuDt6aN20pDKGNakFjw%3A1784190354126&amp;ei=kpVYavWhB6eAhbIPuLPB8Ac&amp;ved=0ahUKEwj1spOC49aVAxUnQEEAHbhZEH4Q4dUDCBI&amp;uact=5&amp;oq=Antivirus+email+scanning&amp;gs_lp=Egxnd3Mtd2l6LXNlcnAiGEFudGl2aXJ1cyBlbWFpbCBzY2FubmluZzIGEAAYFhgeMgYQABgWGB4yBhAAGBYYHjIGEAAYFhgeMgsQABiABBiKBRiGAzILEAAYgAQYigUYhgMyBRAAGO8FMgUQABjvBTIFEAAY7wUyBRAAGO8FSNMKUIIIWIIIcAF4AZABAJgBqQKgAakCqgEDMi0xuAEDyAEA-AEC-AEBmAICoAK4AsICChAAGEcY1gQYsAPCAg0QABiABBiKBRhDGLADwgIXEC4Y3AYYuAYY2gYY2AIYyAMYsAPYAQGYAwCIBgGQBhS6BgYIARABGBmSBwUxLjMtMaAHjgeyBwMzLTG4B64CwgcFMi0xLjHIBwuACAE&amp;sclient=gws-wiz-serp\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Antivirus email scanning<\/strong><\/a> is a common contributor.\u00a0\u00a0<\/li>\n\n\n\n<li id=\"htoc-removing-duplicate-emails-does-not-affect-the-original-mailbox\">Removing duplicate emails does not affect the original mailbox.\u00a0\u00a0<\/li>\n\n\n\n<li id=\"htoc-outlook-express-is-no-longer-supported-by-microsoft-so-some-legacy-behaviour-cannot-be-corrected-through-updates\">Outlook Express is no longer supported by Microsoft, so some legacy behaviour cannot be corrected through updates.\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\n<h2 id=\"htoc-before-you-move-on\" class=\"wp-block-heading\"><strong>Before You Move On<\/strong>&nbsp;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Before contacting 1-grid Support, check that you have:&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li id=\"htoc-confirmed-whether-you-re-using-pop3-or-imap\">Confirmed whether\u00a0you&#8217;re\u00a0using POP3 or IMAP.\u00a0\u00a0<\/li>\n\n\n\n<li id=\"htoc-reviewed-your-send-receive-settings\">Reviewed your Send\/Receive settings.\u00a0\u00a0<\/li>\n\n\n\n<li id=\"htoc-checked-for-duplicate-pop3-accounts\">Checked for duplicate POP3 accounts.\u00a0\u00a0<\/li>\n\n\n\n<li id=\"htoc-tested-with-antivirus-email-scanning-disabled-if-appropriate\">Tested with antivirus email scanning disabled (if\u00a0appropriate).\u00a0\u00a0<\/li>\n\n\n\n<li id=\"htoc-removed-any-corrupted-emails-from-webmail\">Removed any corrupted emails from Webmail.\u00a0\u00a0<\/li>\n\n\n\n<li id=\"htoc-restarted-outlook-after-making-changes\">Restarted Outlook after making changes.\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\n<h2 id=\"htoc-common-mistakes-to-avoid\" class=\"wp-block-heading\"><strong>Common Mistakes to Avoid<\/strong>&nbsp;<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li id=\"htoc-configuring-multiple-pop3-accounts-for-the-same-mailbox\">Configuring multiple POP3 accounts for the same mailbox.\u00a0\u00a0<\/li>\n\n\n\n<li id=\"htoc-emptying-deleted-items-during-active-synchronisation\">Emptying Deleted Items during active synchronisation.\u00a0\u00a0<\/li>\n\n\n\n<li id=\"htoc-assuming-the-mail-server-is-causing-the-issue\">Assuming the mail server is causing the issue.\u00a0\u00a0<\/li>\n\n\n\n<li id=\"htoc-deleting-messages-from-the-server-before-confirming-they-ve-been-downloaded\">Deleting messages from the server before confirming\u00a0they&#8217;ve\u00a0been downloaded.\u00a0\u00a0<\/li>\n\n\n\n<li id=\"htoc-leaving-antivirus-email-scanning-disabled-permanently-after-testing\">Leaving antivirus email scanning disabled permanently after testing.\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\n<h2 id=\"htoc-if-this-didn-t-work\" class=\"wp-block-heading\"><strong>If This Didn&#8217;t Work<\/strong>&nbsp;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">If duplicate emails continue downloading, please gather the following information before contacting 1-grid Support:&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li id=\"htoc-your-domain-name\">Your domain name\u00a0\u00a0<\/li>\n\n\n\n<li id=\"htoc-your-email-address\">Your email address\u00a0\u00a0<\/li>\n\n\n\n<li id=\"htoc-whether-you-re-using-pop3-or-imap\">Whether\u00a0you&#8217;re\u00a0using POP3 or IMAP\u00a0\u00a0<\/li>\n\n\n\n<li id=\"htoc-your-outlook-version\">Your Outlook version\u00a0\u00a0<\/li>\n\n\n\n<li id=\"htoc-whether-the-issue-affects-one-mailbox-or-multiple-mailboxes\">Whether the issue affects one mailbox or multiple mailboxes\u00a0\u00a0<\/li>\n\n\n\n<li id=\"htoc-approximately-how-many-duplicate-emails-are-being-downloaded\">Approximately how\u00a0many duplicate emails are being downloaded\u00a0\u00a0<\/li>\n\n\n\n<li id=\"htoc-a-screenshot-of-your-outlook-account-settings-excluding-your-password\">A screenshot of your Outlook account settings (excluding your password)\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Providing this information helps us investigate the issue more efficiently.\u00a0<\/p>\n\n\n\n<h2 id=\"htoc-related-articles\" class=\"wp-block-heading\"><strong>Related Articles<\/strong>&nbsp;<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li id=\"htoc-troubleshoot-outlook-and-outlook-express-email-error-messages\"><a href=\"https:\/\/1grid.co.za\/knowledge\/troubleshoot-outlook-email-error-messages-1-grid\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Troubleshoot Outlook and Outlook Express Email Error Messages\u00a0\u00a0<\/strong><\/a><\/li>\n\n\n\n<li id=\"htoc-i-am-getting-a-please-enter-network-password-error-message\"><a href=\"https:\/\/1grid.co.za\/knowledge\/fix-please-enter-network-password-error-in-outlook-1-grid\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>I Am Getting a &#8220;Please Enter Network Password&#8221; Error Message\u00a0\u00a0<\/strong><\/a><\/li>\n\n\n\n<li id=\"htoc-pop3-vs-imap-what-s-the-difference\"><a href=\"https:\/\/1grid.co.za\/knowledge\/what-is-the-difference-between-imap-and-pop\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>POP3 vs IMAP:\u00a0What&#8217;s\u00a0the Difference?\u00a0\u00a0<\/strong><\/a><\/li>\n\n\n\n<li id=\"htoc-i-can-browse-the-internet-but-i-cannot-get-my-email\"><a href=\"https:\/\/1grid.co.za\/knowledge\/cannot-receive-email-while-internet-connection-works-1-grid\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>I Cannot Get My Email, but I Can Browse the Internet<\/strong><\/a><\/li>\n\n\n\n<li id=\"htoc-maximum-email-size-for-sending-and-receiving\"><a href=\"https:\/\/1grid.co.za\/knowledge\/email-size-limits-maximum-for-sending-and-receiving-with-1-grid\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Maximum Email Size for Sending and Receiving\u00a0with 1-grid\u00a0<\/strong><\/a><\/li>\n\n\n\n<li id=\"htoc-\"><a href=\"https:\/\/1grid.co.za\/knowledge\/outlook-cannot-synchronize-subscribed-folders\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Outlook Cannot Synchronize Subscribed Folders (How to Fix)<\/strong><\/a><\/li>\n<\/ul>\n\n\n\n<h2 id=\"htoc-faqs\" class=\"wp-block-heading\"><strong>FAQs<\/strong>&nbsp;<\/h2>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>Why is Outlook downloading the same emails repeatedly?\u00a0<\/strong><\/summary>\n<p class=\"wp-block-paragraph\" id=\"htoc-why-is-outlook-downloading-the-same-emails-repeatedly\">This is commonly caused by POP3 synchronisation settings, duplicate account configuration, antivirus email scanning, or corrupted messages on the mail server.\u00a0<\/p>\n<\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>Does this happen with IMAP accounts?\u00a0<\/strong><\/summary>\n<p class=\"wp-block-paragraph\" id=\"htoc-does-this-happen-with-imap-accounts\">It is much less common. Duplicate downloads are primarily associated with POP3 accounts.\u00a0<\/p>\n<\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>Will\u00a0deleting\u00a0duplicate emails affect the originals?\u00a0<\/strong><\/summary>\n<p class=\"wp-block-paragraph\" id=\"htoc-will-deleting-duplicate-emails-affect-the-originals\">No. Removing duplicate copies from Outlook will not normally affect your mailbox unless you intentionally\u00a0delete\u00a0the original messages from the server.\u00a0<\/p>\n<\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>Can antivirus software cause duplicate emails?\u00a0<\/strong><\/summary>\n<p class=\"wp-block-paragraph\" id=\"htoc-can-antivirus-software-cause-duplicate-emails\">Yes. Some antivirus programs interrupt Outlook&#8217;s communication with the mail server, causing messages to download repeatedly.\u00a0<\/p>\n<\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>Should I switch from POP3 to IMAP?\u00a0<\/strong><\/summary>\n<p class=\"wp-block-paragraph\" id=\"htoc-should-i-switch-from-pop3-to-imap\">If you use multiple devices, IMAP often provides a better synchronisation experience and reduces many issues associated with POP3. However, changing account types should be planned carefully to avoid data loss.\u00a0<\/p>\n<\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>Is this a problem with 1-grid&#8217;s mail server?\u00a0<\/strong><\/summary>\n<p class=\"wp-block-paragraph\" id=\"htoc-is-this-a-problem-with-1-grid-s-mail-server\">In most cases, no. Duplicate email downloads are typically caused by Outlook configuration or software running on the local device.\u00a0<\/p>\n<\/details>\n\n\n\n<h2 id=\"htoc-empowering-insight\" class=\"wp-block-heading\"><strong>Empowering Insight<\/strong>&nbsp;<\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1600\" height=\"300\" src=\"https:\/\/1grid.co.za\/knowledge\/wp-content\/uploads\/2026\/03\/1-grid-Images-for-KB-Articles-1000-x-600-px-1600-x-300-px.png\" alt=\"Empowering Insight\" class=\"wp-image-34464\"\/><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">Duplicate emails are usually caused by how Outlook communicates with your mailbox rather than an issue with the mailbox itself. Checking your account configuration and synchronisation settings often resolves the problem without needing technical support.&nbsp;<\/p>\n\n\n\n<h2 id=\"htoc-need-additional-support\" class=\"wp-block-heading\"><strong>Need Additional Support?<\/strong>&nbsp;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">If&nbsp;you&#8217;ve&nbsp;completed the troubleshooting steps above and Outlook continues downloading duplicate emails, the 1-grid Support team is here to help.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/1grid.co.za\/contact-us\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Contact us <\/strong><\/a>with the email address, domain name, Outlook version, account type (POP3 or IMAP), and any screenshots of the issue available to help us investigate more quickly.\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>It can be concerning when Outlook keeps downloading duplicate emails because receiving the same email multiple times can quickly clutter your inbox and make it difficult to manage your messages. Fortunately, this issue is usually caused by Outlook configuration, POP3 settings, synchronisation behaviour, or antivirus software rather than a problem&#8230;<\/p>\n","protected":false},"author":21,"comment_status":"closed","ping_status":"closed","template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"ht-kb-category":[1173,1194],"ht-kb-tag":[1902,1898,336,1901,1900,503,1887,709,1899,1678],"class_list":["post-35037","ht_kb","type-ht_kb","status-publish","format-standard","hentry","ht_kb_category-email","ht_kb_category-email-troubleshooting","ht_kb_tag-downloading-duplicate-emails","ht_kb_tag-duplicate-emails","ht_kb_tag-email","ht_kb_tag-email-support","ht_kb_tag-email-sync","ht_kb_tag-imap","ht_kb_tag-microsoft-outlook","ht_kb_tag-outlook","ht_kb_tag-outlook-troubleshooting","ht_kb_tag-pop3"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Outlook Downloading Duplicate Emails: How To Fix | 1-grid\u00a0 - 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