{"id":2086,"date":"2015-05-07T13:49:15","date_gmt":"2015-05-07T12:49:15","guid":{"rendered":"https:\/\/www.uk-cheapest.co.uk\/support\/?p=2086"},"modified":"2026-08-11T23:29:09","modified_gmt":"2026-08-11T22:29:09","slug":"how-to-setup-email-using-mozilla-thunderbird","status":"publish","type":"post","link":"https:\/\/www.uk-cheapest.co.uk\/support\/how-to-setup-email-using-mozilla-thunderbird\/","title":{"rendered":"How to Set Up Email in Mozilla Thunderbird"},"content":{"rendered":"<div class=\"ukc-organic-guide\">\n<section class=\"ukc-organic-hero\" aria-labelledby=\"thunderbird-answer\">\n<p class=\"ukc-organic-kicker\">Mozilla Thunderbird email setup<\/p>\n<h2 id=\"thunderbird-answer\">Configure Thunderbird with secure UKC IMAP and SMTP settings<\/h2>\n<p class=\"ukc-organic-lead\"><strong>Use Manual configuration when automatic discovery does not find the correct values.<\/strong> Choose IMAP port 993 with SSL\/TLS and SMTP port 587 with STARTTLS, with Normal password authentication and the full email address as both usernames.<\/p>\n<div class=\"ukc-organic-actions\"><a class=\"ukc-organic-button\" href=\"#thunderbird-steps\" data-ukc-organic-cta=\"top\" data-ukc-organic-destination=\"setup_steps\">Set Up Thunderbird<\/a><a class=\"ukc-organic-text-link\" href=\"#thunderbird-settings\">View the settings<\/a><\/div>\n<div class=\"ukc-organic-facts\">\n<article><span>INCOMING<\/span><strong>IMAP 993<\/strong><small>SSL\/TLS<\/small><\/article>\n<article><span>OUTGOING<\/span><strong>SMTP 587<\/strong><small>STARTTLS<\/small><\/article>\n<article><span>AUTHENTICATION<\/span><strong>Normal password<\/strong><small>Full address as username<\/small><\/article>\n<\/div>\n<\/section>\n<nav class=\"ukc-organic-nav\" aria-label=\"On this page\"><strong>On this page<\/strong><a href=\"#thunderbird-before\">Before you start<\/a><a href=\"#thunderbird-settings\">Settings<\/a><a href=\"#thunderbird-steps\">Setup steps<\/a><a href=\"#thunderbird-troubleshooting\">Troubleshooting<\/a><a href=\"#thunderbird-faq\">Questions<\/a><\/nav>\n<h2 id=\"thunderbird-before\">Before opening Account Setup<\/h2>\n<div class=\"ukc-organic-grid four\">\n<article class=\"ukc-organic-card\"><span class=\"ukc-organic-number\">1<\/span><\/p>\n<h3>Confirm the address<\/h3>\n<p>The address must exist as a mailbox, not only as an email forwarder.<\/p>\n<\/article>\n<article class=\"ukc-organic-card\"><span class=\"ukc-organic-number\">2<\/span><\/p>\n<h3>Test webmail<\/h3>\n<p>Confirm the full email address and password can sign in and send mail.<\/p>\n<\/article>\n<article class=\"ukc-organic-card\"><span class=\"ukc-organic-number\">3<\/span><\/p>\n<h3>Copy the server name<\/h3>\n<p>Open Plesk Mail Client Setup and use the exact supported hostname.<\/p>\n<\/article>\n<article class=\"ukc-organic-card\"><span class=\"ukc-organic-number\">4<\/span><\/p>\n<h3>Install current Thunderbird<\/h3>\n<p>Update the application before troubleshooting a setup screen that differs from this guide.<\/p>\n<\/article>\n<\/div>\n<aside class=\"ukc-organic-note\"><strong>These manual values apply to a UKC Plesk-hosted mailbox.<\/strong> Microsoft 365, Google Workspace and other providers use their own server settings and may require OAuth rather than Normal password.<\/aside>\n<h2 id=\"thunderbird-settings\">Thunderbird IMAP and SMTP settings<\/h2>\n<div class=\"ukc-organic-table-wrap\" role=\"region\" aria-label=\"Thunderbird email settings\" tabindex=\"0\">\n<table class=\"ukc-organic-table\">\n<thead>\n<tr>\n<th scope=\"col\">Thunderbird field<\/th>\n<th scope=\"col\">Incoming<\/th>\n<th scope=\"col\">Outgoing<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<th scope=\"row\">Protocol<\/th>\n<td>IMAP<\/td>\n<td>SMTP<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Hostname<\/th>\n<td>Exact hostname shown in Plesk<\/td>\n<td>Exact hostname shown in Plesk<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Port<\/th>\n<td>993<\/td>\n<td>587<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Connection security<\/th>\n<td>SSL\/TLS<\/td>\n<td>STARTTLS<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Authentication method<\/th>\n<td>Normal password<\/td>\n<td>Normal password<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Username<\/th>\n<td>Complete email address<\/td>\n<td>Complete email address<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>Use SMTP port 465 with SSL\/TLS only when implicit TLS is needed. If you deliberately require POP3, choose port 995 with SSL\/TLS. IMAP is recommended for synchronisation with phones, other computers and webmail.<\/p>\n<h2 id=\"thunderbird-steps\">Add the mailbox to Thunderbird<\/h2>\n<div class=\"ukc-organic-flow\">\n<article><strong>1. Add a mail account<\/strong><\/p>\n<p>Open Account Settings, choose Account Actions and Add Mail Account. A first launch may open this form automatically.<\/p>\n<\/article>\n<p><span class=\"arrow\" aria-hidden=\"true\">&rarr;<\/span><\/p>\n<article><strong>2. Enter identity details<\/strong><\/p>\n<p>Enter the sender name, complete email address and mailbox password, then continue.<\/p>\n<\/article>\n<p><span class=\"arrow\" aria-hidden=\"true\">&rarr;<\/span><\/p>\n<article><strong>3. Open Manual config<\/strong><\/p>\n<p>Replace any guessed values with the exact incoming and outgoing settings above. Check both usernames.<\/p>\n<\/article>\n<p><span class=\"arrow\" aria-hidden=\"true\">&rarr;<\/span><\/p>\n<article><strong>4. Re-test and finish<\/strong><\/p>\n<p>Use Re-test, then Done. Send to another address, reply and confirm both directions work.<\/p>\n<\/article>\n<\/div>\n<aside class=\"ukc-organic-warning\"><strong>Do not use No authentication for SMTP.<\/strong> Outgoing mail requires authentication using the full email address and mailbox password.<\/aside>\n<h2>Check an existing Thunderbird account<\/h2>\n<p>Open Account Settings and select Server Settings under the mailbox to check the IMAP hostname, port, connection security, authentication method and username. Then select Outgoing Server (SMTP), edit the server used by this identity and verify its hostname, port, STARTTLS, Normal password and full username.<\/p>\n<p>If several accounts are configured, also confirm that the mailbox identity is assigned to the correct SMTP server. A correct server with the wrong saved identity can still reject sending.<\/p>\n<h2 id=\"thunderbird-troubleshooting\">Thunderbird troubleshooting<\/h2>\n<div class=\"ukc-organic-grid two\">\n<article class=\"ukc-organic-card\">\n<h3>Configuration could not be verified<\/h3>\n<p>Open Manual config and check every value. Automatic discovery may not know the exact hostname assigned to the UKC mailbox.<\/p>\n<\/article>\n<article class=\"ukc-organic-card\">\n<h3>Sending fails but receiving works<\/h3>\n<p>Edit Outgoing Server (SMTP). Confirm port 587, STARTTLS, Normal password and the complete email-address username.<\/p>\n<\/article>\n<article class=\"ukc-organic-card\">\n<h3>Password is rejected repeatedly<\/h3>\n<p>Test webmail, then remove the saved password for the affected hostname from Thunderbird&#8217;s Passwords settings and enter the current password again.<\/p>\n<\/article>\n<article class=\"ukc-organic-card\">\n<h3>Certificate warning appears<\/h3>\n<p>Do not add a permanent exception for an unexpected certificate. Correct the hostname so it matches the supported service certificate.<\/p>\n<\/article>\n<\/div>\n<p>If the fault also appears in webmail, follow the <a href=\"https:\/\/www.uk-cheapest.co.uk\/support\/my-email-is-not-working-i-cannot-sendreceive-emails\/\" data-ukc-organic-cta=\"troubleshooting\" data-ukc-organic-destination=\"email_troubleshooting\">email sending and receiving diagnostic guide<\/a>.<\/p>\n<h2 id=\"thunderbird-faq\">Thunderbird setup questions<\/h2>\n<div class=\"ukc-organic-faq\">\n<details open>\n<summary>Should Authentication method be OAuth2?<\/summary>\n<p>Use Normal password for a standard UKC Plesk-hosted mailbox. OAuth2 is appropriate only when the actual mailbox provider supports and requires it.<\/p>\n<\/details>\n<details>\n<summary>Why does Thunderbird show two usernames?<\/summary>\n<p>Incoming IMAP and outgoing SMTP are separate services. Enter the complete email address for both.<\/p>\n<\/details>\n<details>\n<summary>Can Thunderbird import an old local mail archive?<\/summary>\n<p>That is separate from adding the live mailbox. Back up the Thunderbird profile and old messages before migrating or removing an existing POP account.<\/p>\n<\/details>\n<details>\n<summary>Can I switch an existing POP account to IMAP?<\/summary>\n<p>Create and test a separate IMAP account first, then move or copy mail carefully. Do not remove the POP account until any locally stored messages are backed up.<\/p>\n<\/details>\n<\/div>\n<p class=\"ukc-organic-note\">Client workflow reference: <a href=\"https:\/\/support.mozilla.org\/en-US\/kb\/getting-started-thunderbird\" rel=\"nofollow noopener\" target=\"_blank\">Mozilla&#8217;s current Thunderbird getting-started guide<\/a> and <a href=\"https:\/\/support.mozilla.org\/en-US\/kb\/configuration-options-accounts\" rel=\"nofollow noopener\" target=\"_blank\">account configuration reference<\/a>. Server-setting reference: <a href=\"https:\/\/docs.plesk.com\/en-US\/obsidian\/customer-guide\/quick-start-with-plesk\/set-up-mail-accounts\/2-access-your-mailbox.65691\/\" rel=\"nofollow noopener\" target=\"_blank\">Plesk Mail Client Setup documentation<\/a>.<\/p>\n<section class=\"ukc-organic-final\" aria-labelledby=\"thunderbird-final\">\n<div>\n<p class=\"ukc-organic-kicker\">Still unable to connect?<\/p>\n<h2 id=\"thunderbird-final\">Send the settings and error, never the password<\/h2>\n<p>Include the Thunderbird version, operating system, whether webmail works and the exact incoming or outgoing error.<\/p>\n<\/div>\n<div class=\"ukc-organic-final-actions\"><a class=\"ukc-organic-button\" href=\"https:\/\/billing.uk-cheapest.co.uk\/submitticket.php\" data-ukc-organic-cta=\"support\" data-ukc-organic-destination=\"helpdesk\">Ask UKC Support<\/a><a href=\"https:\/\/billing.uk-cheapest.co.uk\/store\/email-hosting?ukc_ref=support_thunderbird_setup&amp;ukc_cta=final\" data-ukc-organic-cta=\"final\" data-ukc-organic-destination=\"email_hosting\">Compare Email Plans<\/a><\/div>\n<\/section>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Mozilla Thunderbird email setup Configure Thunderbird with secure UKC IMAP and SMTP settings Use Manual configuration when automatic discovery does not find the correct values. Choose IMAP port 993 with SSL\/TLS and SMTP port 587 with STARTTLS, with Normal password authentication and the full email address as both usernames. Set Up ThunderbirdView the settings INCOMINGIMAP &#8230; <a title=\"How to Set Up Email in Mozilla Thunderbird\" class=\"read-more\" href=\"https:\/\/www.uk-cheapest.co.uk\/support\/how-to-setup-email-using-mozilla-thunderbird\/\" aria-label=\"Read more about How to Set Up Email in Mozilla Thunderbird\">Read more&#8230;<\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"generate_page_header":"","footnotes":""},"categories":[16,244],"tags":[],"class_list":["post-2086","post","type-post","status-publish","format-standard","hentry","category-email","category-plesk12"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Set Up Email in Mozilla Thunderbird | UKC<\/title>\n<meta name=\"description\" content=\"Configure a UKC mailbox in Mozilla Thunderbird using secure IMAP and SMTP 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