{"id":142,"date":"2011-11-27T03:46:00","date_gmt":"2011-11-27T03:46:00","guid":{"rendered":"http:\/\/pheonixsolutions.com\/?p=142"},"modified":"2026-05-15T08:40:44","modified_gmt":"2026-05-15T03:10:44","slug":"horde-mail-issue","status":"publish","type":"post","link":"https:\/\/pheonixsolutions.com\/blog\/horde-mail-issue\/","title":{"rendered":"Horde mail issue"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Introduction<\/h2>\n\n\n\n<p>If you are unable to log in to Horde with the correct email username and password, the issue may be due to missing domain entries in the server configuration files.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Prerequisites<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Root or SSH access to the server<\/li>\n\n\n\n<li>Access to mail configuration files<\/li>\n\n\n\n<li>Domain and email account configured on the server<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Implementation<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Horde Login Issue<\/h3>\n\n\n\n<p>If you cannot log in to Horde for any mail account of the domain using the correct username and password, check the following:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Check the domain entry (domain.com) in the following file:<\/li>\n<\/ol>\n\n\n\n<p>            \/etc\/userdomains<\/p>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>If the domain entry (domain.com) is missing, manually add the domain to this file.<\/li>\n\n\n\n<li>Try logging in to Horde again. The login should work successfully.<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Mail Sending Error in Horde<\/h3>\n\n\n\n<p>If you can access Horde but encounter the following error while sending emails:<\/p>\n\n\n\n<p>Error:<\/p>\n\n\n\n<p>There was an error sending your message: Failed to add recipient: <a>user@domain.com<\/a> [SMTP: Invalid response code received from server (code: 451, response: Temporary local problem, please try later)]<\/p>\n\n\n\n<p>This issue occurs due to the missing domain entry in the following file:<\/p>\n\n\n\n<p>\/etc\/localdomains<\/p>\n\n\n\n<p>Add the domain entry (domain.com) to the \/etc\/localdomains file and try sending the email again.<\/p>\n\n\n\n<p>The mail functionality should now work correctly.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p>By ensuring the domain entry exists in both \/etc\/userdomains and \/etc\/localdomains, you can resolve Horde login and email-sending issues.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Introduction If you are unable to log in to Horde with the correct email username and password, the issue may be due to missing domain entries in the server configuration files. Prerequisites Implementation Horde Login Issue If you cannot log in to Horde for any mail account of the domain&hellip; <a href=\"https:\/\/pheonixsolutions.com\/blog\/horde-mail-issue\/\" class=\"more-link read-more\" rel=\"bookmark\">Continue Reading <span class=\"screen-reader-text\">Horde mail issue<\/span><i class=\"fa fa-arrow-right\"><\/i><\/a><\/p>\n","protected":false},"author":1,"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":{"0":"post-142","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"hentry","6":"category-uncategorized","7":"h-entry","9":"h-as-article"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pheonix Solutions - We Empower Your Business Growth<\/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\/blog\/horde-mail-issue\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pheonix Solutions - We Empower Your Business Growth\" \/>\n<meta property=\"og:description\" content=\"Introduction If you are unable to log in to Horde with the correct email username and password, the issue may be due to missing domain entries in the server configuration files. 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