{"id":24032,"date":"2026-01-19T11:40:06","date_gmt":"2026-01-19T11:40:06","guid":{"rendered":"https:\/\/1-grid.com\/knowledge\/email-address-rejected-by-server-error-in-your-iphone-ipad-mac-mail\/"},"modified":"2026-01-20T09:26:16","modified_gmt":"2026-01-20T09:26:16","slug":"email-address-rejected-by-server-error-in-your-iphone-ipad-mac-mail","status":"publish","type":"ht_kb","link":"https:\/\/1grid.co.za\/knowledge\/email-address-rejected-by-server-error-in-your-iphone-ipad-mac-mail\/","title":{"rendered":"How to Fix an \u201cEmail Address Rejected by Server\u201d Error on iPhone, iPad, and Mac Mail"},"content":{"rendered":"\n<p>When your Apple Mail app (on iPhone, iPad, or Mac) displays&nbsp;<strong>\u201cEmail Address Rejected by Server\u201d,&nbsp;<\/strong>it means your device could not authenticate (log in) to the&nbsp;<strong>outgoing mail server (<\/strong><a href=\"https:\/\/en.wikipedia.org\/wiki\/Simple_Mail_Transfer_Protocol\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>SMTP<\/strong><\/a><strong>)<\/strong>. This prevents emails from sending or completing the connection.&nbsp;<\/p>\n\n\n\n<p>Without proper authentication, the mail server&nbsp;won\u2019t&nbsp;let you send mail, which usually points to incorrect settings, password mismatches, or security requirements that&nbsp;aren\u2019t&nbsp;met.&nbsp;<\/p>\n\n\n\n<p>This guide will show you why this happens, how to fix it step-by-step, what to do if basic steps fail, and provide you with best practices to avoid it in future.<\/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\/2022\/02\/1-grid-Images-for-KB-Articles-1000-x-600-px-16.png\" alt=\"How to Fix \u201cEmail Address Rejected by Server\u201d Error on iPhone, iPad, and Mac Mail \" class=\"wp-image-34126\"\/><\/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\">Table of Contents<\/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-why-this-error-occurs1\">Why This Error Occurs&nbsp;<\/a><\/li><li class=\"\"><a href=\"#htoc-\">How to Fix the \u201cEmail Address Rejected by Server\u201d Error<\/a><ul class=\"ht_toc_child_list\"><li class=\"\"><a href=\"#htoc-1-restart-your-device-amp-check-your-internet\">1. Restart Your Device &amp; Check Your Internet&nbsp;<\/a><\/li><li class=\"\"><a href=\"#htoc-2-verify-your-email-login-details\">2. Verify Your Email Login Details&nbsp;<\/a><\/li><li class=\"\"><a href=\"#htoc-3-enable-smtp-authentication1\">3. Enable SMTP Authentication&nbsp;<\/a><ul class=\"ht_toc_child_list\"><li class=\"\"><a href=\"#htoc-iphone-ipad\">iPhone\/iPad&nbsp;<\/a><\/li><li class=\"\"><a href=\"#htoc-mac-mail\">Mac Mail&nbsp;<\/a><\/li><\/ul><\/li><li class=\"\"><a href=\"#htoc-4-check-smtp-server-amp-port-settings\">4. Check SMTP Server &amp; Port Settings&nbsp;<\/a><ul class=\"ht_toc_child_list\"><li class=\"\"><a href=\"#htoc-iphone-ipad1\">iPhone\/iPad&nbsp;<\/a><\/li><li class=\"\"><a href=\"#htoc-mac-mail1\">Mac Mail<\/a><\/li><\/ul><\/li><li class=\"\"><a href=\"#htoc-5-remove-amp-re-add-the-email-account\">5. Remove &amp; Re-Add the Email Account&nbsp;<\/a><ul class=\"ht_toc_child_list\"><li class=\"\"><a href=\"#htoc-iphone-ipad11\">iPhone\/iPad&nbsp;<\/a><\/li><li class=\"\"><a href=\"#htoc-mac-mail11\">Mac Mail<\/a><\/li><\/ul><\/li><li class=\"\"><a href=\"#htoc-6-update-your-apple-software\">6. Update Your iOS, iPadOS, or macOS Apple Software&nbsp;<\/a><ul class=\"ht_toc_child_list\"><li class=\"\"><a href=\"#htoc-iphone-ipad111\">iPhone\/iPad <\/a><\/li><li class=\"\"><a href=\"#htoc-macos\">macOS<\/a><\/li><\/ul><\/li><li class=\"\"><a href=\"#htoc-7-contact-your-email-provider-if-needed\">7. Contact Your Email Provider (If&nbsp;Needed)&nbsp;<\/a><\/li><\/ul><\/li><li class=\"\"><a href=\"#htoc-summary\">Summary<\/a><\/li><li class=\"\"><a href=\"#htoc-1\">Our&nbsp;Scope of Support&nbsp;<\/a><\/li><li class=\"\"><a href=\"#htoc-11\">FAQs&nbsp;&nbsp;<\/a><\/li><li class=\"\"><a href=\"#htoc-1111111\">Additional&nbsp;Resources&nbsp;<\/a><\/li><li class=\"\"><a href=\"#htoc-11111111\">Need Additional Support?&nbsp;<\/a><\/li><\/ul><\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"htoc-why-this-error-occurs1\"><strong>Why This Error Occurs&nbsp;<\/strong><\/h2>\n\n\n\n<p>This error&nbsp;generally arises&nbsp;when your device&nbsp;fails to&nbsp;authenticate with the SMTP (outgoing) mail server, causing your Apple device to be unable to send or receive emails. This error is commonly seen in<strong> <a href=\"https:\/\/www.icloud.com\/mail\">iOS Mail<\/a><\/strong>,<strong> <a href=\"https:\/\/support.apple.com\/guide\/ipad\/get-started-with-mail-ipad3a4b6297\/ipados\">iPadOS Mail<\/a><\/strong>, and<strong> <a href=\"https:\/\/support.apple.com\/en-za\/guide\/mail\/welcome\/mac\">macOS Mail <\/a><\/strong>apps when using<strong> <a href=\"https:\/\/1grid.co.za\/knowledge\/what-is-the-difference-between-imap-and-pop\/\">IMAP<\/a><\/strong>,<strong> <a href=\"https:\/\/en.wikipedia.org\/wiki\/Simple_Mail_Transfer_Protocol\">SMTP<\/a><\/strong>, or<strong> <a href=\"https:\/\/1grid.co.za\/knowledge\/what-is-the-difference-between-imap-and-pop\/\">POP<\/a> <\/strong>email accounts.<br>&nbsp;<br>Common causes include:&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li id=\"htoc-incorrect-email-settings\"><strong>Incorrect&nbsp;<\/strong><a href=\"https:\/\/1grid.co.za\/knowledge\/settings-to-configure-your-1grid-email-accounts-across-devices\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>email settings<\/strong><\/a>&nbsp;\n<ul class=\"wp-block-list\">\n<li id=\"htoc-wrong-server-host-username-or-password\"><em>Wrong server host, username, or password.&nbsp;<\/em><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li id=\"htoc-smtp-authentication-not-enabled\"><strong>SMTP authentication not enabled<\/strong>&nbsp;\n<ul class=\"wp-block-list\">\n<li id=\"htoc-required-but-turned-off\"><em>Required but&nbsp;turned&nbsp;off.&nbsp;<\/em><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li id=\"htoc-wrong-port-or-encryption-settings\"><strong>Wrong&nbsp;<\/strong><a href=\"https:\/\/1grid.co.za\/knowledge\/settings-to-configure-your-1grid-email-accounts-across-devices\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>port or encryption settings<\/strong><\/a>&nbsp;\n<ul class=\"wp-block-list\">\n<li id=\"htoc-ssl-tls-mismatch\"><em>SSL\/TLS mismatch.&nbsp;<\/em><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li id=\"htoc-password-recently-changed\"><a href=\"https:\/\/1grid.co.za\/knowledge\/?s=email+password&amp;ht-kb-search=1&amp;lang=\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Password<\/strong><\/a><strong>&nbsp;recently changed<\/strong>&nbsp;\n<ul class=\"wp-block-list\">\n<li id=\"htoc-device-not-updated\"><em>Device not updated.&nbsp;<\/em><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li id=\"htoc-email-provider-blocking-access\"><strong>Email provider is blocking access<\/strong>&nbsp;\n<ul class=\"wp-block-list\">\n<li id=\"htoc-unrecognised-device-ip\"><em>Unrecognised&nbsp;device\/<a href=\"https:\/\/1grid.co.za\/knowledge\/?s=IP&amp;ht-kb-search=1&amp;lang=\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>IP<\/strong><\/a>.<\/em><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li id=\"htoc-temporary-server-issues\"><strong>Temporary&nbsp;<\/strong><a href=\"https:\/\/1-grid.com\/client\/serverstatus.php\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>server issues<\/strong><\/a>&nbsp;\n<ul class=\"wp-block-list\">\n<li id=\"htoc-server-downtime\"><em>Server downtime.<\/em>&nbsp;<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"htoc-\"><strong>How to Fix the \u201cEmail Address Rejected by Server\u201d Error<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"htoc-1-restart-your-device-amp-check-your-internet\"><strong>1. Restart Your Device &amp; Check Your Internet<\/strong>&nbsp;<\/h3>\n\n\n\n<p>Temporary glitches and unstable connections can trigger errors.&nbsp;<\/p>\n\n\n\n<p>Before making any changes, restart your iPhone, iPad, or Mac and ensure you have a stable internet connection.<br>&nbsp;<br><strong>Steps<\/strong>&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li id=\"htoc-close-mail-app\"><strong>Close the Mail app<\/strong> completely.<\/li>\n\n\n\n<li id=\"htoc-restart-your-device-power-off-and-then-turn-it-back-on\"><strong>Restart your device<\/strong> (Power off and then turn it back on).<\/li>\n\n\n\n<li id=\"htoc-reconnect-to-a-stable-wi-fi-or-mobile-network\"><strong>Reconnect to a stable Wi-Fi or mobile network<\/strong>.<\/li>\n<\/ul>\n\n\n\n<p><strong>TIP<\/strong><em>:<\/em>&nbsp;Sometimes a fresh connection<strong>&nbsp;<\/strong><a href=\"https:\/\/1grid.co.za\/knowledge\/how-to-fix-cannot-verify-server-identity-error\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>clears out cached errors<\/strong><\/a><strong>&nbsp;<\/strong>and allows Mail to reconnect securely.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"htoc-2-verify-your-email-login-details\"><strong>2. Verify Your Email Login Details<\/strong>&nbsp;<\/h3>\n\n\n\n<p>If the&nbsp;<a href=\"https:\/\/1grid.co.za\/knowledge\/?s=email+password&amp;ht-kb-search=1&amp;lang=\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>username or password<\/strong><\/a><strong>&nbsp;<\/strong>on your device&nbsp;doesn\u2019t&nbsp;match the server\u2019s records, authentication fails.&nbsp;<\/p>\n\n\n\n<p>This means you need to ensure that your email address and password are correct, especially if you recently changed your email password.<br>&nbsp;<br><strong>Steps<\/strong>&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li id=\"htoc-settings-mail-accounts\">Go to <strong>Settings &gt; Mail &gt; Accounts<\/strong>.<\/li>\n\n\n\n<li id=\"htoc-select-the-affected-email-account\">Select the affected email account.<\/li>\n\n\n\n<li id=\"htoc-tap-account-settings-and-verify-the-email-address-and-password\">Tap <strong>Account Settings<\/strong> and verify the email address and password.<\/li>\n\n\n\n<li id=\"htoc-if-the-password-is-incorrect-update-it-with-the-correct-one\">If the password is incorrect, update it with the correct one.<\/li>\n<\/ul>\n\n\n\n<p><strong>TIP:&nbsp;<\/strong>It ensures&nbsp;your device&nbsp;actually has&nbsp;the<strong>&nbsp;<\/strong><a href=\"https:\/\/1grid.co.za\/knowledge\/?s=email+password&amp;ht-kb-search=1&amp;lang=\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>correct credentials<\/strong><\/a><strong>&nbsp;<\/strong>your mail server expects.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"htoc-3-enable-smtp-authentication1\"><strong>3. Enable SMTP Authentication<\/strong>&nbsp;<\/h3>\n\n\n\n<p>Some servers&nbsp;require&nbsp;a separate \u201c<a href=\"https:\/\/learn.microsoft.com\/en-us\/answers\/questions\/4511776\/checking-secure-password-authentication-(spa)\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>spa<\/strong><\/a>\u201d check before sending mail.&nbsp;<\/p>\n\n\n\n<p>This is where authentication is required for outgoing emails, so ensure that this setting is enabled.<\/p>\n\n\n\n<h6 class=\"wp-block-heading\" id=\"htoc-iphone-ipad\"><strong>iPhone\/iPad<\/strong>&nbsp;<\/h6>\n\n\n\n<ul class=\"wp-block-list\">\n<li id=\"htoc-go-to-settings-mail-accounts\">Go to <strong>Settings &gt; Mail &gt; Accounts<\/strong>.<\/li>\n\n\n\n<li id=\"htoc-select-your-email-account-and-tap-smtp-under-outgoing-mail-server1\">Select your email account and tap <strong>SMTP<\/strong> under Outgoing Mail Server.<\/li>\n\n\n\n<li id=\"htoc-tap-the-primary-smtp-server-e-g-mail-example-com1\">Tap the primary SMTP server (e.g., <code><em>mail.example.com<\/em><\/code>).<\/li>\n\n\n\n<li id=\"htoc-ensure-that-use-authentication-is-enabled-and-enter-your-email-credentials-if-required1\">Ensure that <strong>Use Authentication<\/strong> is enabled and enter your email credentials if required.<\/li>\n<\/ul>\n\n\n\n<h6 class=\"wp-block-heading\" id=\"htoc-mac-mail\"><strong>Mac Mail<\/strong>&nbsp;<\/h6>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li id=\"htoc-open-mail-gt-preferences\">Open <strong>Mail &gt; Preferences<\/strong>.<\/li>\n\n\n\n<li id=\"htoc-select-accounts-and-choose-your-email-account\">Select <strong>Accounts<\/strong> and choose your email account.<\/li>\n\n\n\n<li id=\"htoc-click-on-server-settings\">Click on <strong>Server Settings<\/strong>.<\/li>\n\n\n\n<li id=\"htoc-ensure-that-outgoing-mail-server-smtp-authentication-is-enabled\">Ensure that <strong>Outgoing Mail Server (SMTP) Authentication<\/strong> is enabled.<\/li>\n<\/ol>\n\n\n\n<p><strong>TIP:<\/strong>&nbsp;This tells your mail server, \u201cI\u2019m allowed to send mail,\u201d which stops rejection.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"htoc-4-check-smtp-server-amp-port-settings\"><strong>4. Check SMTP Server &amp; Port Settings<\/strong>&nbsp;<\/h3>\n\n\n\n<p>Using incorrect SMTP settings can cause email rejection errors. Make sure your settings match your provider\u2019s recommendations.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Setting<\/strong>&nbsp;<\/td><td><strong>Recommended Value<\/strong>&nbsp;<\/td><\/tr><tr><td>SMTP Server&nbsp;<\/td><td>mail.yourdomain.com&nbsp;(or as provided)<\/td><\/tr><tr><td>Port (SSL)&nbsp;<\/td><td>465&nbsp;<\/td><\/tr><tr><td>Port (TLS)&nbsp;<\/td><td>587&nbsp;<\/td><\/tr><tr><td>Authentication&nbsp;<\/td><td>Required&nbsp;<\/td><\/tr><tr><td>Username&nbsp;<\/td><td>Your full email&nbsp;<\/td><\/tr><tr><td>Password&nbsp;<\/td><td>Your email password&nbsp;<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h6 class=\"wp-block-heading\" id=\"htoc-iphone-ipad1\"><strong>iPhone\/iPad<\/strong>&nbsp;<\/h6>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li id=\"htoc-go-to-settings-gt-mail-gt-accounts11\">Go to <strong>Settings &gt; Mail &gt; Accounts<\/strong>.<\/li>\n\n\n\n<li id=\"htoc-select-your-email-account-and-tap-smtp\">Select your email account and tap <strong>SMTP<\/strong>.<\/li>\n\n\n\n<li>Tap the primary SMTP server and verify:\n<ul class=\"wp-block-list\">\n<li id=\"htoc-server-on\"><strong>Server: ON<\/strong><\/li>\n\n\n\n<li id=\"htoc-hostname-mail-example-com\"><strong>Hostname:<\/strong> <code><em>mail.example.com<\/em><\/code><\/li>\n\n\n\n<li id=\"htoc-username-your-full-email-address\"><strong>Username:<\/strong> Your full email address<\/li>\n\n\n\n<li id=\"htoc-password-correct-password\"><strong>Password:<\/strong> Correct password<\/li>\n\n\n\n<li id=\"htoc-ssl-enabled\"><strong>SSL:<\/strong> Enabled<\/li>\n\n\n\n<li id=\"htoc-port-465-for-ssl-or-587-for-tls\"><strong>Port:<\/strong> <code>465<\/code> (for SSL) or <code>587<\/code> (for TLS)<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h6 class=\"wp-block-heading\" id=\"htoc-mac-mail1\"><strong>Mac Mail<\/strong><\/h6>\n\n\n\n<ul class=\"wp-block-list\">\n<li id=\"htoc-open-mail-preferences-accounts\">Open <strong>Mail &gt; Preferences &gt; Accounts<\/strong>.<\/li>\n\n\n\n<li id=\"htoc-select-your-email-account-and-go-to-server-settings\">Select your email account and go to <strong>Server Settings<\/strong>.<\/li>\n\n\n\n<li id=\"htoc-verify-the-outgoing-mail-server-details-and-ensure-ssl-is-enabled\">Verify the outgoing mail server details and ensure <strong>SSL is enabled<\/strong>.&nbsp;<\/li>\n<\/ul>\n\n\n\n<p><strong>TIP:<\/strong>&nbsp;Matching<strong>&nbsp;<\/strong><a href=\"https:\/\/1grid.co.za\/knowledge\/settings-to-configure-your-1grid-email-accounts-across-devices\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>what the server expects<\/strong><\/a>&nbsp;eliminates&nbsp;most authentication mismatches.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"htoc-5-remove-amp-re-add-the-email-account\"><strong>5. Remove &amp; Re-Add the Email Account<\/strong>&nbsp;<\/h3>\n\n\n\n<p>At times,&nbsp;<a href=\"https:\/\/1grid.co.za\/knowledge\/?s=create+email&amp;ht-kb-search=1&amp;lang=\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>re-adding the email account<\/strong><\/a><strong>&nbsp;<\/strong>is needed if the settings are correct, but the error&nbsp;<em>still<\/em>&nbsp;occurs.&nbsp;<\/p>\n\n\n\n<h6 class=\"wp-block-heading\" id=\"htoc-iphone-ipad11\"><strong>iPhone\/iPad<\/strong>&nbsp;<\/h6>\n\n\n\n<ul class=\"wp-block-list\">\n<li id=\"htoc-go-to-settings-mail-accounts1\">Go to <strong>Settings &gt; Mail &gt; Accounts<\/strong>.<\/li>\n\n\n\n<li id=\"htoc-select-the-affected-account-and-tap-delete-account1\">Select the affected account and tap <strong>Delete Account<\/strong>.<\/li>\n\n\n\n<li id=\"htoc-restart-your-device-and-go-back-to-settings-gt-mail-gt-add-account1\">Restart your device and go back to <strong>Settings &gt; Mail &gt; Add Account<\/strong>.<\/li>\n\n\n\n<li id=\"htoc-re-enter-your-email-credentials-and-configure-the-account1\">Re-enter your email credentials and configure the account.&nbsp;<\/li>\n<\/ul>\n\n\n\n<h6 class=\"wp-block-heading\" id=\"htoc-mac-mail11\"><strong>Mac Mail<\/strong><\/h6>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li id=\"htoc-open-mail-gt-preferences-gt-accounts1\">Open <strong>Mail &gt; Preferences &gt; Accounts<\/strong>.<\/li>\n\n\n\n<li id=\"htoc-select-the-affected-email-account-and-click-remove\">Select the affected email account and click <strong>Remove (-)<\/strong>.<\/li>\n\n\n\n<li id=\"htoc-restart-your-mac-and-re-add-the-account\">Restart your Mac and re-add the account.<\/li>\n<\/ol>\n\n\n\n<p><strong>TIP:&nbsp;<\/strong>This resets any hidden configuration&nbsp;issues that&nbsp;can\u2019t&nbsp;be seen in menus.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"htoc-6-update-your-apple-software\"><strong>6. Update Your <strong>iOS, iPadOS, or macOS<\/strong> Apple Software<\/strong>&nbsp;<\/h3>\n\n\n\n<p>Outdated OS versions sometimes conflict with modern server authentication. <\/p>\n\n\n\n<p>Ensure that your device is running the latest software update to prevent compatibility issues.&nbsp;<\/p>\n\n\n\n<h6 class=\"wp-block-heading\" id=\"htoc-iphone-ipad111\"><strong>iPhone\/iPad <\/strong><\/h6>\n\n\n\n<ul class=\"wp-block-list\">\n<li id=\"htoc-go-to-settings-general-software-update\">Go to <strong>Settings &gt; General &gt; Software Update<\/strong>.<\/li>\n\n\n\n<li id=\"htoc-if-an-update-is-available-install-it1\">If an update is available, install it.<\/li>\n\n\n\n<li id=\"htoc-restart-your-device-and-check-if-the-issue-is-resolved1\">Restart your device and check if the issue is resolved.&nbsp;<\/li>\n<\/ul>\n\n\n\n<h6 class=\"wp-block-heading\" id=\"htoc-macos\"><strong>macOS<\/strong><\/h6>\n\n\n\n<ul class=\"wp-block-list\">\n<li id=\"htoc-go-to-settings-general-software-update1\">Go to <strong>Settings &gt; General &gt; Software Update<\/strong>.<\/li>\n\n\n\n<li id=\"htoc-if-an-update-is-available-install-it\">If an update is available, install it.<\/li>\n\n\n\n<li id=\"htoc-restart-your-device-and-check-if-the-issue-is-resolved\">Restart your device and check if the issue is resolved<\/li>\n<\/ul>\n\n\n\n<p><strong>TIP:<\/strong>&nbsp;This ensures compatibility with current mail encryption standards.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"htoc-7-contact-your-email-provider-if-needed\"><strong>7. Contact Your Email Provider (If&nbsp;Needed)<\/strong>&nbsp;<\/h3>\n\n\n\n<p>If none of the above works, your mail host may be blocking access due to security policies or unusual logins.<\/p>\n\n\n\n<p><strong>NOTE:&nbsp;<\/strong>Your provider can verify server logs and unlock your device or IP for secure access.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"htoc-summary\">Summary<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Issue<\/td><td>Remove and re-add the email account<\/td><\/tr><tr><td>Incorrect email login credentials<\/td><td>Update your password in email settings<\/td><\/tr><tr><td>SMTP authentication not enabled<\/td><td>Enable authentication under SMTP settings<\/td><\/tr><tr><td>Wrong SMTP port or security settings<\/td><td>Use Port 465 (SSL) or 587 (TLS)<\/td><\/tr><tr><td>Outdated device software<\/td><td>Update iOS, iPadOS, or macOS<\/td><\/tr><tr><td>Corrupt email configuration<\/td><td>Remove and re-add email account<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"htoc-1\"><strong>Our&nbsp;<\/strong><a href=\"https:\/\/1grid.co.za\/knowledge\/1-grid-scope-of-support\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Scope of Support<\/strong><\/a><strong>&nbsp;<\/strong><\/h2>\n\n\n\n<p>If&nbsp;you\u2019re&nbsp;stuck and need any&nbsp;additional&nbsp;guidance or support,&nbsp;here\u2019s&nbsp;an outline of what we can do and what is not within&nbsp;our<strong>&nbsp;<\/strong><a href=\"https:\/\/1grid.co.za\/knowledge\/1-grid-scope-of-support\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Scope of Support<\/strong><\/a>.&nbsp;<\/p>\n\n\n\n<p><strong><\/strong><a href=\"https:\/\/1grid.co.za\/knowledge\/1-grid-scope-of-support\/#htoc-standard-support-included\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Included Support<\/strong><\/a><strong><\/strong>&nbsp;<\/p>\n\n\n\n<p>We can&nbsp;assist&nbsp;with:&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li id=\"htoc-help-interpreting-settings\">Help interpreting settings&nbsp;<\/li>\n\n\n\n<li id=\"htoc-guiding-through-step-by-step-fixes\">Guiding through step-by-step fixes&nbsp;<\/li>\n\n\n\n<li id=\"htoc-checking-dns-and-server-reachability\">Checking DNS and server reachability&nbsp;<\/li>\n\n\n\n<li id=\"htoc-confirming-whether-settings-look-valid\">Confirming whether the settings look valid&nbsp;<\/li>\n<\/ul>\n\n\n\n<p><strong><\/strong><a href=\"https:\/\/1grid.co.za\/knowledge\/1-grid-scope-of-support\/#htoc-11111\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Advanced Support (Paid Services)<\/strong><\/a><strong><\/strong>&nbsp;<\/p>\n\n\n\n<p>We may&nbsp;assist&nbsp;with some services that&nbsp;require&nbsp;advanced support.&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li id=\"htoc-deep-server-log-analysis\">Deep server log analysis&nbsp;<\/li>\n\n\n\n<li id=\"htoc-third-party-server-troubleshooting\">Third-party server troubleshooting&nbsp;<\/li>\n\n\n\n<li id=\"htoc-custom-mail-server-configuration\">Custom mail server configuration&nbsp;<\/li>\n<\/ul>\n\n\n\n<p><strong><\/strong><a href=\"https:\/\/1grid.co.za\/knowledge\/1-grid-scope-of-support\/#htoc-11111111\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Outside Our Scope<\/strong><\/a><strong><\/strong>&nbsp;<\/p>\n\n\n\n<p>We&nbsp;<strong>do not directly control,&nbsp;fix&nbsp;or&nbsp;assist&nbsp;with:<\/strong>&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li id=\"htoc-resetting-local-device-credentials\">Resetting local device credentials&nbsp;<\/li>\n\n\n\n<li id=\"htoc-managing-isp-or-corporate-mail-filters\">Managing ISP or corporate mail filters&nbsp;<\/li>\n\n\n\n<li id=\"htoc-fixing-non-1-grid-server-issues\">Fixing non-1-grid server issues&nbsp;<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"htoc-11\"><strong>FAQs&nbsp;&nbsp;<\/strong><\/h2>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>Q. Why does this error happen after a password change?&nbsp;<\/strong><\/summary>\n<p id=\"htoc-111\">Because devices still try to log in with old credentials.<\/p>\n<\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>Q. Do I need SMTP authentication on all accounts?&nbsp;<\/strong><\/summary>\n<p id=\"htoc-1111\">Yes, most mail servers require it to send mail securely.<\/p>\n<\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>Q.&nbsp;Can this error be&nbsp;on the&nbsp;server-side?<\/strong><\/summary>\n<p id=\"htoc-11111\">Yes, especially if your provider blocks untrusted clients or IPs.<\/p>\n<\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>Q. Will removing and re-adding the account&nbsp;delete&nbsp;emails?<\/strong><\/summary>\n<p id=\"htoc-111111\">No, as your email data stays on the server (for IMAP accounts) and will resync.<\/p>\n<\/details>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"htoc-1111111\"><strong>Additional&nbsp;Resources&nbsp;<\/strong><\/h2>\n\n\n\n<p><a href=\"https:\/\/support.apple.com\/en-za\/102562\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Troubleshooting Email on Apple Devices<\/strong><\/a><br><a href=\"https:\/\/1grid.co.za\/knowledge\/what-is-a-domain-name-server-dns\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Understanding DNS Records<\/strong><\/a>&nbsp;<br><a href=\"https:\/\/1grid.co.za\/knowledge\/how-to-fix-cannot-verify-server-identity-error\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>How to Fix \u201cCannot Verify Certificate\u201d Errors<\/strong><\/a>&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"htoc-11111111\"><strong>Need Additional Support?&nbsp;<\/strong><\/h2>\n\n\n\n<p><strong>We&#8217;re&nbsp;Here to&nbsp;<\/strong><a href=\"https:\/\/1grid.co.za\/knowledge\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Help<\/strong><\/a><strong>:<\/strong>&nbsp;<\/p>\n\n\n\n<p>Fixing&nbsp;an email address rejection error on the server&nbsp;doesn\u2019t&nbsp;have to feel technical&nbsp;with&nbsp;this&nbsp;easy-to-reference guide. Stuck?&nbsp;Check out our&nbsp;<a href=\"https:\/\/1grid.co.za\/knowledge\/1-grid-scope-of-support\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Scope of&nbsp;Support<\/strong><\/a>, and&nbsp;then contact our Support Team for&nbsp;further&nbsp;clarity and&nbsp;guidance&nbsp;(<a href=\"https:\/\/1grid.co.za\/contact-us\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>https:\/\/1grid.co.za\/contact-us\/<\/strong><\/a>).&nbsp;We&#8217;re&nbsp;ready&nbsp;to see how we can help!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>When your Apple Mail app (on iPhone, iPad, or Mac) displays&nbsp;\u201cEmail Address Rejected by Server\u201d,&nbsp;it means your device could not authenticate (log in) to the&nbsp;outgoing mail server (SMTP). This prevents emails from sending or completing the connection.&nbsp; Without proper authentication, the mail server&nbsp;won\u2019t&nbsp;let you send mail, which usually points to&#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":[73,336,1572,369,470,544,545,591,594,828,898],"class_list":["post-24032","ht_kb","type-ht_kb","status-publish","format-standard","hentry","ht_kb_category-email","ht_kb_category-email-troubleshooting","ht_kb_tag-address","ht_kb_tag-email","ht_kb_tag-email-rejected-by-server","ht_kb_tag-error","ht_kb_tag-hosting","ht_kb_tag-ipad","ht_kb_tag-iphone","ht_kb_tag-mac","ht_kb_tag-mail","ht_kb_tag-rejected","ht_kb_tag-server"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Fix an &quot;Email Address Rejected by Server&quot; Error on Apple Devices - 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