{"id":3993,"date":"2026-07-30T02:40:55","date_gmt":"2026-07-30T02:40:55","guid":{"rendered":"https:\/\/pheonixsolutions.com\/knowledge-base\/?p=3993"},"modified":"2026-07-30T02:40:58","modified_gmt":"2026-07-30T02:40:58","slug":"how-to-increase-email-account-disk-quota-using-whm-api","status":"publish","type":"post","link":"https:\/\/pheonixsolutions.com\/knowledge-base\/2026\/07\/30\/how-to-increase-email-account-disk-quota-using-whm-api\/","title":{"rendered":"How to Increase Email Account Disk Quota Using WHM API?"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Introduction<\/h2>\n\n\n\n<p>Email accounts have storage limits (quotas) to control how much mailbox space a user can use. When a mailbox reaches its quota, users may not be able to receive new emails. Using the WHM API, administrators can easily increase the mailbox quota from the command line without logging in to cPanel.<\/p>\n\n\n\n<p>This article explains how to increase an email account&#8217;s disk quota using the WHM API.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Prerequisites<\/h2>\n\n\n\n<p>Before proceeding, ensure you have:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Root access to the WHM\/cPanel server.<\/li>\n\n\n\n<li>SSH access to the server.<\/li>\n\n\n\n<li>An existing cPanel account.<\/li>\n\n\n\n<li>An existing email account.<\/li>\n\n\n\n<li>WHM API access enabled.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Implementation<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Step 1: Connect to the Server<\/h3>\n\n\n\n<p>Log in to the server using SSH as the root user.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ssh root@server-ip<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Step 2: Increase the Email Quota<\/h3>\n\n\n\n<p>Run the following command:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>$ whmapi1 uapi_cpanel \\<br>   cpanel.user=example \\<br>   cpanel.module=Email \\<br>   cpanel.function=edit_pop_quota \\<br>  email=info@example.com \\<br>  quota=5120<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Parameter Details<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>cpanel.user<\/strong> \u2013 cPanel account username<\/li>\n\n\n\n<li><strong>email<\/strong> \u2013 Email account name<\/li>\n\n\n\n<li><strong>quota<\/strong> \u2013 Mailbox quota in MB<\/li>\n<\/ul>\n\n\n\n<p>Example:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>quota=5120<\/code><\/pre>\n\n\n\n<p>This sets the mailbox quota to <strong>5 GB<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Step 3: Set Unlimited Quota (Optional)<\/h3>\n\n\n\n<p>To remove the mailbox size limit:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>$ whmapi1 uapi_cpanel \\<br>cpanel.user=example \\<br>cpanel.module=Email \\<br>cpanel.function=edit_pop_quota \\<br>email=info@example.com \\<br>quota=0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>A value of <strong>0<\/strong> means unlimited storage.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Step 4: Verify the Quota<\/h3>\n\n\n\n<p>Run:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>$ uapi &#8211;user=example Email get_pop_quota \\<br>email=info@example.com<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>You can also list all email accounts and their quotas:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>$ uapi &#8211;user=example Email list_pops<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p>Using the WHM API, administrators can quickly increase or modify email account quotas without accessing cPanel manually. This method is useful for automation, bulk updates, and managing mailbox storage efficiently. Regularly monitoring mailbox usage helps ensure users can continue sending and receiving emails without interruption.<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Introduction Email accounts have storage limits (quotas) to control how much mailbox space a user can use. When a mailbox reaches its quota, users may not be able to receive new emails. Using the WHM API, administrators can easily increase the mailbox quota from the command line without logging in to cPanel. This article explains ..<\/p>\n<div class=\"clear-fix\"><\/div>\n<p><a href=\"https:\/\/pheonixsolutions.com\/knowledge-base\/2026\/07\/30\/how-to-increase-email-account-disk-quota-using-whm-api\/\" title=\"read more...\">Read more<\/a><\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[1],"tags":[],"class_list":["post-3993","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Increase Email Account Disk Quota Using WHM API? - PheonixSolutions Knowledge-Base<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/pheonixsolutions.com\/knowledge-base\/2026\/07\/30\/how-to-increase-email-account-disk-quota-using-whm-api\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to Increase Email Account Disk Quota Using WHM API? - PheonixSolutions Knowledge-Base\" \/>\n<meta property=\"og:description\" content=\"Introduction Email accounts have storage limits (quotas) to control how much mailbox space a user can use. 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