{"id":4057,"date":"2026-03-24T12:46:00","date_gmt":"2026-03-24T12:46:00","guid":{"rendered":"https:\/\/www.systools.in\/blog\/?p=4057"},"modified":"2026-03-25T12:09:04","modified_gmt":"2026-03-25T12:09:04","slug":"outlook-mailbox-full-after-deleting-everything","status":"publish","type":"post","link":"https:\/\/www.systools.in\/blog\/outlook-mailbox-full-after-deleting-everything\/","title":{"rendered":"Resolve Outlook Mailbox Full After Deleting Everything Error"},"content":{"rendered":"<p>Are you facing this \u201cOutlook mailbox full after deleting everything\u201d error? No problem, you aren\u2019t alone. Multiple users wondered if they would clean up emails so they could prevent Outlook mailbox is full issue, but still encountered it. This issue occurs again when we delete any data, and we thought that it was eliminated, but it&#8217;s not permanently deleted from mailbox, which becomes necessary to remove from that.<\/p>\n<p>So, in this article, we are going to discuss what to do when Outlook mailbox full even after deleting everything. We will fix this error by using 7 proven fixes by understanding the root cause of problem and its solutions. Let\u2019s walk through the article.<\/p>\n<div class=\"card my-5 bg-menu\">\n<div class=\"card-header text-center font-weight-bold\">What You\u2019ll Learn <a class=\"badge badge-primary toc-hv\" href=\"#\" data-bs-toggle=\"collapse\" data-bs-target=\"#toc\" aria-expanded=\"true\">Hide<\/a><\/div>\n<div id=\"toc\" class=\"card-body collapse show\">\n<ol>\n<li><a class=\"scroll\" href=\"#why\">Why Does My Outlook Mailbox Full Even After Deleting Everything?<\/a><\/li>\n<li><a class=\"scroll\" href=\"#what\">What Happens When Outlook Mailbox Is Full?<\/a><\/li>\n<li><a class=\"scroll\" href=\"#how\">How to Fix Outlook Mailbox Full After Deleting Everything?<\/a><\/li>\n<ul>\n<li><a class=\"scroll\" href=\"#1\">Step 1: Clean Deleted Items Folder<\/a><\/li>\n<li><a class=\"scroll\" href=\"#2\">Step 2: Use Mailbox Clean-Up Tool<\/a><\/li>\n<li><a class=\"scroll\" href=\"#3\">Step 3: Empty Recoverable Items Folder<\/a><\/li>\n<li><a class=\"scroll\" href=\"#4\">Step 4: Try Shift+Delete to Delete Permanently<\/a><\/li>\n<li><a class=\"scroll\" href=\"#5\">Step 5: Remove Oversized Attachments<\/a><\/li>\n<li><a class=\"scroll\" href=\"#6\">Step 6: Enable Auto-Archive<\/a><\/li>\n<li><a class=\"scroll\" href=\"#7\">Step 7: Compact Data File<\/a><\/li>\n<\/ul>\n<li><a class=\"scroll\" href=\"#change\">Tips to Avoid Outlook Mailbox Full Issue<\/a><\/li>\n<li><a class=\"scroll\" href=\"#conclusion\">Conclusion<\/a><\/li>\n<li><a class=\"scroll\" href=\"#faq\">FAQs on Outlook Mailbox Is Full Error<\/a><\/li>\n<\/ol>\n<\/div>\n<\/div>\n<div class=\"alert alert-info\">\n<h2 id=\"why\"><b>Why Does My Outlook Mailbox Full After Deleting Everything?<\/b><\/h2>\n<p>Before diving into solutions, it&#8217;s necessary to know the reasons behind your Outlook mailbox is full error. Here are common reasons listed below.<\/p>\n<ol>\n<li>When users delete their emails, this data moves to deleted items folder. Thus, even after removing them, they still take up storage space until you delete them manually.<\/li>\n<li>The Outlook data file doesn\u2019t become compressed after deletion process. This displays that your mailbox size remains untouched.<\/li>\n<li>If some users are using Office 365 or MS Exchange Server, then size of mailbox doesn&#8217;t get updated instantly due to some syncing delays.<\/li>\n<li>Some large emails with attachments are the biggest reason, as they consume maximum space in a complete mailbox. So, it should be eliminated properly to lessen mailbox size.<\/li>\n<li>Even after deleting everything from deleted items folder, MS Outlook stores a hidden copy in its recoverable folder for some time. Till then, it continues to take up space.<\/li>\n<\/ol>\n<\/div>\n<div class=\"alert alert-secondary\">\n<p class=\"h3\"><strong>Watch Video to Resolve \u201cOutlook Mailbox Is Full\u201d Issue<\/strong><\/p>\n<\/div>\n<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/C585psbXa1k?si=WrSOeYRqmYbj6QH9\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<h2 id=\"what\"><b>What Happens When Outlook Mailbox Is Full?<\/b><\/h2>\n<p>If one can understand the cause of this frustrating problem, then it can help one to enhance Outlook performance. Let\u2019s take a look at them.<\/p>\n<ul>\n<li>User might stop getting new emails.<\/li>\n<li>You may fail at sending any message.<\/li>\n<li>Performance or Speed of Outlook might slow down.<\/li>\n<li>Any critical emails can easily bounce back to sender.<\/li>\n<\/ul>\n<p>Such issues will make it necessary to fix the error instantly. But how will a user resolve it? Let\u2019s walk through the following section.<\/p>\n<div class=\"alert alert-success\">\n<h3 id=\"how\"><b>How to Fix Outlook Mailbox Full After Deleting Everything?<\/b><\/h3>\n<p>In this follow-up section, we\u2019ll be discovering some best practices to answer the question of what to do when my Outlook mailbox is full. So follow these proven steps to clean up storage space.<\/p>\n<ol>\n<li><b>Clean Deleted Items Folder<\/b><\/li>\n<li><b>Use Mailbox Clean-Up Tool<\/b><\/li>\n<li><b>Empty Recoverable Items Folder<\/b><\/li>\n<li><b>Try Shift+Delete to Delete Permanently<\/b><\/li>\n<li><b>Remove Oversized Attachments<\/b><\/li>\n<li><b>Enable Auto-archive<\/b><\/li>\n<li><b>Compact Data File<\/b><\/li>\n<\/ol>\n<\/div>\n<p>Let\u2019s quickly understand them with an explanation.<\/p>\n<h3 id=\"1\"><b>Method 1: Clean Deleted Items Folder<\/b><\/h3>\n<p><b>Steps to follow:<\/b><\/p>\n<ol>\n<li>Navigate to <b>Deleted Items<\/b>.<\/li>\n<li>Select <b>Empty Folder<\/b> by right-click.<\/li>\n<li>And <b>Confirm <\/b>Deleting.<\/li>\n<\/ol>\n<p>It will make sure that emails are also removed permanently from junk folder.<\/p>\n<h3 id=\"2\"><b>Method 2: Try Outlook Clean-Up Tool<\/b><\/h3>\n<p>MS Outlook offers its built-in option, that helps to free up space from folders, subfolders, and conversations. To use this feature, follow these steps:<\/p>\n<ol>\n<li>Navigate to <b>File<\/b>, then <b>Tools<\/b>, and finally on <b>Mailbox Cleanup<\/b>.<\/li>\n<li>Check <b>Mailbox Size<\/b><\/li>\n<li><b>Search <\/b>for old and oversized emails.<\/li>\n<li>And <b>remove <\/b>unwanted items.<\/li>\n<\/ol>\n<p>This is a very simple method to handle your Outlook mailbox. But sometimes, mailbox can also be full due to duplicates in it. This built-in feature can be useful only to some extent. In such cases, we recommend using a trusted software, which is<b> SysTools <\/b><a href=\"https:\/\/www.systools.in\/products\/outlook-duplicate-items-remover\/\"><b>PST Duplicate Items Remover Tool<\/b><\/a>. This will help you in eliminating all duplicates from mailbox automatically and increase your mailbox storage space.<\/p>\n<nav id=\"nav-tab\" class=\"nav nav-tabs\" role=\"tablist\"><a id=\"nav-win-tab\" class=\"nav-link active\" role=\"tab\" href=\"#nav-win\" data-bs-toggle=\"tab\" aria-controls=\"nav-win\" aria-selected=\"true\"><svg width=\"25\" height=\"25\"><use xlink:href=\"#icon-window\" fill=\"#036\"><\/use><\/svg> Windows<\/a><a id=\"nav-mac-tab\" class=\"nav-link\" role=\"tab\" href=\"#nav-mac\" data-bs-toggle=\"tab\" aria-controls=\"nav-mac\" aria-selected=\"false\"><svg width=\"25\" height=\"25\"><use xlink:href=\"#icon-mac\" fill=\"#036\"><\/use><\/svg> Mac<\/a><\/nav>\n<div id=\"nav-tabContent\" class=\"tab-content\">\n<div id=\"nav-win\" class=\"tab-pane fade show active\" role=\"tabpanel\" aria-labelledby=\"nav-win-tab\">\n<div class=\"d-flex\">\n<p class=\"text-center\"><a class=\"btn btn-lg btn-success btn-md-block m-2\" href=\"https:\/\/systoolskart.com\/download\/SYS0O7D8R\/29\" rel=\"nofollow\">Download Now<\/a> <a class=\"btn btn-lg btn-danger btn-md-block m-2\" href=\"https:\/\/systoolskart.com\/buy\/SYS0O7D8R\/29\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">Purchase Now<\/a><\/p>\n<\/div>\n<\/div>\n<div id=\"nav-mac\" class=\"tab-pane fade\" role=\"tabpanel\" aria-labelledby=\"nav-mac-tab\">\n<div class=\"d-flex\">\n<p class=\"text-center\"><a class=\"btn btn-lg btn-success btn-md-block m-2\" href=\"https:\/\/systoolskart.com\/download\/SYS4M0D8R\/29\" rel=\"nofollow\">Download Now<\/a> <a class=\"btn btn-lg btn-danger btn-md-block m-2\" href=\"https:\/\/systoolskart.com\/buy\/SYS4M0D8R\/29\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">Purchase Now<\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n<p>&nbsp;<\/p>\n<h3 id=\"3\"><b>Method 3: Empty Recoverable Items Folder<\/b><\/h3>\n<p>One should always check and remove any data that remains in hidden folder. Follow the steps to eliminate.<\/p>\n<p><strong>Steps:<\/strong><\/p>\n<ol>\n<li>Go to <b>Deleted Items.<\/b><\/li>\n<li>Press on <b>Recover Deleted Items From Server.<\/b><\/li>\n<li><b>Select <\/b>complete data and <b>remove <\/b>them permanently.<\/li>\n<\/ol>\n<p>It\u2019s essential to completely resolve the root cause of the Outlook mailbox full after deleting everything.<\/p>\n<h4 id=\"4\"><b>Method 4: Try Shift+Delete to Remove Permanently<\/b><\/h4>\n<p>Users can bypass the deleted items folder step if they use this method:<\/p>\n<ul>\n<li><b>Choose <\/b>all emails.<\/li>\n<li>Hold <b>Shift <\/b>and <b>delete <\/b>button together.<\/li>\n<\/ul>\n<p>It will remove all unnecessary emails quickly.<\/p>\n<h4 id=\"5\"><b>Method 5: Remove Large Attachments<\/b><\/h4>\n<p>Attachments are the most storage space-consuming item. If they are not of use or unwanted, then you should remove them from mailbox.<\/p>\n<ul>\n<li>One can search the <b>messages by size<\/b>.<\/li>\n<li><b>Save <\/b>them in your local system as a backup.<\/li>\n<li><b>Clear all <\/b>attachments from emails.<\/li>\n<\/ul>\n<p>Cleaning of unnecessary or large attachments will help to reduce mailbox size.<\/p>\n<h4 id=\"6\"><b>Method 6: Enable Auto Archive Option<\/b><\/h4>\n<p>Users can enable autoarchive feature to transfer older messages to different data files.<\/p>\n<p><strong>Steps:<\/strong><\/p>\n<ol>\n<li>Navigate to <b>File<\/b>, then tap <b>Options<\/b>, and finally on <b>Advanced tab<\/b>.<\/li>\n<li><b>Enable <\/b>Auto Archive feature.<\/li>\n<li><b>Set <\/b>archive frequency according to your use.<\/li>\n<\/ol>\n<p>Enabling option will avoid the Outlook mailbox is full error.<\/p>\n<h4 id=\"7\"><b>Method 7: Compact Data File<\/b><\/h4>\n<p>After using all methods above, if your issue is still not fixed, then there is a simple solution, which is to shrink your file size. This will help you lessen the original file size, which enhances Outlook productivity.<\/p>\n<p><b>Steps:<\/b><\/p>\n<ol>\n<li>Go to <b>File<\/b>, then tap on <b>Account Settings <\/b>and finally hit <b>Data Files<\/b>.<\/li>\n<li><b>Choose <\/b>your PST file, which you want to reduce in size.<\/li>\n<li>Click on <b>Settings <\/b>and press <b>Compact Now <\/b>button.<\/li>\n<\/ol>\n<div class=\"alert alert-secondary\"><b>Pro Tip:<\/b> This manual method is simple but not reliable enough, as it can\u2019t compact an excessively large data file. Sometimes, Outlook might not support that large file. In such cases, we would like to suggest using an automated software, which is <a href=\"https:\/\/www.systools.in\/products\/pst-compress\/\"><b>SysTools PST Compress Tool<\/b><\/a>. This utility is very trusted and reliable, which can easily make an oversized file into a compressed file. It maintains original data structure while compacting data file.<\/p>\n<p class=\"text-center\"><a class=\"btn btn-lg btn-success btn-md-block m-2\" href=\"https:\/\/www.systools.in\/download\/SYS1P0S2T\/29\" rel=\"nofollow\">Download Now<\/a> <a class=\"btn btn-lg btn-danger btn-md-block m-2\" href=\"https:\/\/www.systools.in\/buy\/SYS1P0S2T\/29\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">Purchase Now<\/a><\/p>\n<\/div>\n<div class=\"alert alert-primary\">\n<h5 id=\"tip\"><b>Tips to Avoid Outlook Mailbox Full After Deleting Everything<\/b><\/h5>\n<p>To prevent this Outlook mailbox is full problem, follow these best practices:<\/p>\n<ul>\n<li>Habitually clear your deleted items, junk, and recoverable folder.<\/li>\n<li>Try not to send or receive large attachments.<\/li>\n<li>Enable auto archive option for outdated messages.<\/li>\n<li>Regularly check your Outlook mailbox size.<\/li>\n<li>Ensure to use professionals to avoid risk of accidental deletion of data.<\/li>\n<\/ul>\n<\/div>\n<h5 id=\"conclusion\"><b>Conclusion<\/b><\/h5>\n<p>In the informative article, we\u2019ve discovered how to fix Outlook mailbox full after deleting everything using 7 proven steps. This error can be caused by various reasons, but we\u2019ve listed all solutions to resolve Outlook Mailbox is full issue. One can effectively get rid of this recurring problem by following our above step guide. Don\u2019t forget to clear deleted items or hidden folders, as it\u2019ll help to speed up Outlook performance.<\/p>\n<div class=\"alert alert-warning\">\n<h5 id=\"faq\"><b>FAQs on Outlook Mailbox Is Full Error<\/b><\/h5>\n<p><b>Q.1 Is There Any Way to Increase Outlook Mailbox Space?<\/b><br \/>\n<strong>A. Yes<\/strong>, if you\u2019re an MS 365 user, then you can upgrade your storage quota or use custom archive mailbox.<\/p>\n<p><b>Q.2 What Do I Do When My Outlook Mailbox Is Full?<\/b><br \/>\n<strong>A.<\/strong> One should free up space from deleted items folder, recoverable folder, and large attachments. Otherwise, use cleanup tool or compress your data file to reduce mailbox size.<\/p>\n<p><b>Q.3 What to Do When Outlook Mailbox Full After Deleting Everything?<\/b><br \/>\n<strong>A.<\/strong> User should remove all emails from hidden or recoverable items folder for permanent deletion.<\/p>\n<p><b>Q.4 Why Does My Outlook Keeps Saying My Mailbox Is Full Even After Deleting Emails?<\/b><br \/>\n<b>A. <\/b>It usually occurs because your deleted messages are still in deleted items folder. If you want to prevent this, you have to manually remove it from there.<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Are you facing this \u201cOutlook mailbox full after deleting everything\u201d error? No problem, you aren\u2019t alone. Multiple users wondered if they would clean up emails so they could prevent Outlook <\/p>\n","protected":false},"author":7,"featured_media":5309,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[351],"class_list":["post-4057","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-outlook"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Outlook Mailbox Full After Deleting Everything? Try 7 Fixes<\/title>\n<meta name=\"description\" content=\"Facing Outlook Mailbox Full After Deleting Everything? Learn why your Outlook mailbox is full and know easy ways to clean up space quickly.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.systools.in\/blog\/outlook-mailbox-full-after-deleting-everything\/\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"siddharth\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.systools.in\\\/blog\\\/outlook-mailbox-full-after-deleting-everything\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.systools.in\\\/blog\\\/outlook-mailbox-full-after-deleting-everything\\\/\"},\"author\":{\"name\":\"siddharth\",\"@id\":\"https:\\\/\\\/www.systools.in\\\/blog\\\/#\\\/schema\\\/person\\\/a719240fe0eff759b37c012b65b0f138\"},\"headline\":\"Resolve Outlook Mailbox Full After Deleting Everything Error\",\"datePublished\":\"2026-03-24T12:46:00+00:00\",\"dateModified\":\"2026-03-25T12:09:04+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.systools.in\\\/blog\\\/outlook-mailbox-full-after-deleting-everything\\\/\"},\"wordCount\":1342,\"commentCount\":0,\"image\":{\"@id\":\"https:\\\/\\\/www.systools.in\\\/blog\\\/outlook-mailbox-full-after-deleting-everything\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.systools.in\\\/blog\\\/wp-content\\\/uploads\\\/2024\\\/06\\\/systools-2026-03-25T111106.008.png\",\"articleSection\":[\"Outlook\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.systools.in\\\/blog\\\/outlook-mailbox-full-after-deleting-everything\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.systools.in\\\/blog\\\/outlook-mailbox-full-after-deleting-everything\\\/\",\"url\":\"https:\\\/\\\/www.systools.in\\\/blog\\\/outlook-mailbox-full-after-deleting-everything\\\/\",\"name\":\"Outlook Mailbox Full After Deleting Everything? 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