Wondering why?<\/strong> It\u2019s because WordPress uses an outdated method, i.e., the basic PHP mail function, to send emails. This is where issues like WordPress mail function not working and wp_mail not working commonly appear.<\/p>\n\n\n\n By following the right steps to troubleshoot WordPress email, you can fix WordPress SMTP Issues, improve deliverability, and restore trust using the correct WordPress SMTP settings and SMTP server configuration WordPress.<\/p>\n\n\n\n In this guide, you\u2019ll learn how to troubleshoot WordPress email delivery issues and why plugins like Post SMTP are essential to improve email deliverability.<\/p>\n\n\n\n WordPress email delivery issues happen when your website fails to send emails properly or when emails don\u2019t reach the inbox, resulting in WordPress email errors.<\/p>\n\n\n\n This doesn\u2019t always mean the email wasn\u2019t sent. In fact, WordPress email not delivered issues usually occur because:<\/p>\n\n\n\n By default, WordPress uses the PHP mail() function, which does not provide proper authentication mechanisms such as SPF, DKIM, or DMARC<\/strong><\/a>. As a result, email providers often treat WordPress messages as suspicious. Not fixing this leads to email sending issues and poor inbox placement.<\/p>\n\n\n\n This is why businesses often face WordPress password reset email failures, WooCommerce emails not sending<\/a><\/strong>, and WordPress contact forms not sending emails.<\/p>\n\n\n\n In short, email delivery issues stem from trust and authentication issues between your website and email providers.<\/p>\n\n\n\n Understanding these causes is very important as it will help you troubleshoot effectively and ensure your WordPress site communicates reliably.<\/p>\n\n\n\n Not all WordPress email plugins (also known as WordPress SMTP Plugins<\/strong><\/a>) have the capability to solve email delivery problems. Many simply patch over the default PHP mail() function<\/strong> without addressing the real causes of delivery failures.\u00a0<\/p>\n\n\n\n Plugins like Post SMTP truly solve WordPress email delivery issues, replace the default mailer with authenticated SMTP protocol connections, provide delivery tracking, and offer multiple diagnostic tools.<\/p>\n\n\n\n When selecting a WordPress email plugin, look for these features:<\/p>\n\n\n\n Avoid plugins that aren\u2019t receiving many updates. Email authentication evolves quickly, and outdated tools can leave your site at risk. <\/p>\n\n\n\n You can also browse our curated list of the 8 best SMTP plugins for WordPress<\/strong><\/a> to see why Post SMTP stands out among its competitors.<\/p>\n\n\n\n Remember, basic email delivery issues can be solved with simple checks:<\/p>\n\n\n\n These quick fixes can address minor problems, but most WordPress email delivery issues stem from deeper causes, such as authentication failures, misconfigured SMTP settings, or poor sender reputation. That\u2019s where Post SMTP comes in.<\/p>\n\n\n\n The first thing you should do is install Post SMTP if you haven’t already. It takes under two minutes: <\/p>\n\n\n\n This will help avoid conflicts between plugins. Third-party plugins love to silently override your sender identity. <\/p>\n\n\n\n If it lands in your inbox, you’re connected. If it doesn’t, Post SMTP logs the exact error, and that log entry is your starting point for everything below.<\/p>\n\n\n\n NOTE:<\/strong> If you need any further assistance with configuring WordPress SMTP<\/a><\/strong>, don\u2019t hesitate to reach out to us for professional support.<\/p>\n\n\n\n A misspelled recipient address is one of those problems that’s easy to overlook. The email appears to send, but it never arrives, and without logging, you’d have no idea, causing customer inquiry emails to disappear or other issues.<\/p>\n\n\n\n Post SMTP records every delivery attempt in its log, including the full recipient address and the exact error returned by the mail server. If a specific address keeps failing, the log will indicate whether it’s a hard bounce (due to a full mailbox) or a soft bounce (due to a server timeout). <\/p>\n\n\n\n Post SMTP enables Validation Settings by default. This checks addresses against proper formatting rules. This one setting alone can meaningfully cut your bounce rate over time.<\/p>\n\n\n\n For important WordPress emails, such as security alerts, password resets, or other critical notifications, if they are not received, it\u2019s always a good practice to manually authenticate WordPress emails.<\/p>\n\n\n\n This is one of the most frustrating email delivery problems because everything looks fine on your end, emails are sent, but they’re landing in spam. The root cause is almost always missing email authentication.\u00a0<\/p>\n\n\n\n Post SMTP’s Spam Score Checker is the fastest way to get a clear picture of where you stand. Head to your WordPress dashboard \u2192 Post SMTP, and on the right side under Troubleshoot, you will find Spam Score Checker.<\/p>\n\n\n\n You will be redirected to Spam Score Checker.<\/p>\n\n\n\n Click on the email address to copy, or click on the button and send an email from the sender you want to test.<\/p>\n\n\n\n After sending, click on Confirm email sent to begin testing your spam score.<\/p>\n\n\n\n Post SMTP\u2019s spam score checker returns your email\u2019s spam score along with detailed SPF, DKIM, and DMARC results, helping you identify and fix deliverability issues.<\/p>\n\n\n\n Beyond authentication, sending bulk emails looks suspicious to providers, and using generic \u201cFrom addresses\u201d reduces trust. You can use Post SMTP \u201cemail address\u201d and \u201cname\u201d lock settings to keep your sender identity consistent. The Spam Score Checker gives you an ongoing way to verify that your emails land in clean inboxes.<\/p>\n\n\n\n If you’re connecting Post SMTP to a transactional email provider like Mailgun or Brevo via API, and you enter an incorrect key, it cuts off all delivery the moment it becomes invalid. This happens often: after a key rotation, provider account change, or copy-paste error during setup.<\/p>\n\n\n\n Whenever you update or replace an API key, run Post SMTP’s Send Test Email immediately after saving. <\/p>\n\n\n\n Don’t assume it worked; verify it. <\/p>\n\n\n\n Post SMTP\u2019s Diagnostic Test helps identify whether issues originate from API authentication or SMTP connection layers. In addition, Post SMTP logs every email delivery<\/strong><\/a> attempt with error messages and timestamps, so if something like an API key expires, you can quickly pinpoint when failures began.<\/p>\n\n\n\n SPF, DKIM, and DMARC are the three DNS-based authentication standards that tell the internet your domain is authorized to send email. Without them, even a perfectly configured SMTP connection will produce untrustworthy emails. Missing records cause authentication failures. Badly formatted records can be just as damaging as having none at all.<\/p>\n\n\n\n Post SMTP’s Spam Score Checker audits your authentication records as part of its scoring process, flagging what’s absent, misconfigured, or conflicting. It gives you a list of fixes.<\/p>\n\n\n\n If the tool highlights a DNS record issue, you\u2019ll need to configure your DNS settings correctly. Our guide, WordPress Not Sending Emails on GoDaddy<\/a><\/strong>, will help if you\u2019re using GoDaddy for your domain or hosting.<\/p>\n\n\n\n Once you’ve published the updated records, use the Diagnostic Test to confirm they\u2019re being recognized. Keep in mind that DNS propagation can take anywhere from a few minutes to 48 hours, and the diagnostic tool will show whether Post SMTP is detecting the records correctly yet.<\/p>\n\n\n\n If you are unable to fix DNS records, the Post SMTP technical team is readily available to assist you. You can place your Instant Expert Assistance request<\/a><\/strong>.<\/p>\n\n\n\n Sender reputation is the credit score of the email world. It’s invisible, but it shapes everything. If your domain or sending IP has historically generated spam complaints, high bounce rates, or inconsistent sending patterns, providers will throttle or block your emails. And like credit, reputation damage is slow to repair. Therefore, catching problems early is everything.<\/p>\n\n\n\n Post SMTP’s Email Health Reporting is your early warning system here. You can access it by going to Post SMTP \u2192 Settings \u2192 Email Reporting.<\/p>\n\n\n\n Set it to deliver a weekly report covering emails sent, opened, and failed, and you’ll start to see patterns before they become serious problems. A gradual rise in failure rates or a sudden drop in open rates are signals worth catching at week one, not week six.<\/p>\n\n\n\n Post SMTP’s Notification Settings let you connect to Slack, Microsoft Teams, Twilio SMS, or a custom Webhook, etc, so you’re alerted the moment an email delivery fails. Staying aware of the failures is crucial to improving reputation over time.<\/p>\n\n\n\n Even with proper authentication and a stable SMTP setup, email delivery can still fail due to various reasons. <\/p>\n\n\n\n When that happens, critical WordPress emails may never be sent. With Post SMTP Mailer, you can enable the Failed Emails Fallback feature to add a backup delivery path. By configuring a backup SMTP service, the plugin will automatically retry failed messages through the fallback mailer if the primary service becomes unavailable or exceeds its limits.<\/p>\n\n\n\n This is especially important for business-critical emails such as WooCommerce order<\/a><\/strong> confirmations, password resets, and contact form notifications. Instead of relying on a single delivery channel, fallback ensures your emails have a second route and plays a key role in overall email reliability.<\/p>\n\n\n\n To enable it, you have to follow the steps below:<\/p>\n\n\n\n Step 1:<\/strong> Go to your WordPress dashboard, then to Post SMTP \u2192 Settings \u2192 Fallback<\/p>\n\n\n\n Step 2:<\/strong> Enable \u201cUse Fallback?\u201d by clicking on Yes.<\/p>\n\n\n\n Step 3:<\/strong> Enter all the necessary information. Also, always enable SMTP Authentication unless your provider explicitly says not to.<\/p>\n\n\n\n Step 4: <\/strong>Click Save Changes.<\/p>\n\n\n\n Your backup SMTP is ready to use.<\/p>\n\n\n\n Combined with real-time alerts, you end up with a deliverability setup that actively monitors, catches order confirmation email missing problems, and keeps sending reputation intact.<\/p>\n\n\n\n One of the more underrated causes of email delivery failure is a blocked port. When you configure an SMTP connection, your mail server expects to communicate over a specific port: typically port 25, 465, or 587. If your hosting provider or server firewall has blocked that port, WordPress simply can’t establish a connection to your mail server at all. Every email fails as the path is just closed.<\/p>\n\n\n\n This is where Post SMTP’s Connectivity Test earns its place. <\/p>\n\n\n\n It scans the well-known SMTP ports and tells you exactly which ones are open and available for Post SMTP to use. If the port your mailer is configured to use comes back blocked, you know immediately to contact your hosting provider to get the restriction lifted.<\/p>\n\n\n\n It’s a simple test that takes seconds to run, but it answers a question that would otherwise take hours of back-and-forth with your host to diagnose. If you’ve double-checked your SMTP credentials, run the diagnostic, and emails are still failing, run the Connectivity Test. A blocked port is often the culprit.<\/p>\n\n\n\n Now, if you are in the Post SMTP dashboard and notice failed emails, you\u2019d normally look for ways to resend them. Let\u2019s see how you can make this possible.<\/p>\n\n\n\n Here you will see a very user-friendly and clean interface, where you can see the total, successful, failed, and opened emails. You can also spot Recent Logs, where it’s a detailed overview of each email.<\/p>\n\n\n\n Once a success message appears, you have successfully sent a failed email.<\/p>\n\n\n\n You can enable WordPress debug mode for email issues in two ways: through the file manager or a debugging plugin.<\/p>\n\n\n\n Enable WordPress Debug Mode with File Manager:<\/strong><\/p>\n\n\n\n define( ‘WP_DEBUG’, false );<\/p>\n\n\n\n Update it to:<\/p>\n\n\n\n define( ‘WP_DEBUG’, true );<\/p>\n\n\n\n define( ‘WP_DEBUG_LOG’, true );<\/p>\n\n\n\n You have successfully enabled WordPress debug mode.<\/p>\n\n\n\n If your WordPress emails aren\u2019t behaving, the error messages can feel vague or a bit intimidating. Here\u2019s a breakdown of what those common issues are actually telling you:<\/p>\n\n\n\n No email received<\/strong><\/p>\n\n\n\n This usually means your site didn\u2019t manage to send the email at all. A common reason is that your server’s PHP mail() function is turned off or restricted. In short, WordPress tried, but your server didn\u2019t let it go out.<\/p>\n\n\n\n Emails going to spam<\/strong><\/p>\n\n\n\n If messages are landing in spam folders, it\u2019s often about trust. Missing email authentication records like SPF, DKIM, or DMARC can make your emails look suspicious to receiving servers.<\/p>\n\n\n\n 550 \/ 554 errors<\/strong><\/p>\n\n\n\n These codes mean the receiving server rejected your email. That could be due to an invalid recipient address or because your email looked like spam from their perspective.<\/p>\n\n\n\n Timeout \/ 500 errors<\/strong><\/p>\n\n\n\n This points to a connection issue. Your hosting provider may be blocking the SMTP port you\u2019re trying to use, so WordPress can\u2019t connect to the mail server in time.<\/p>\n\n\n\n Plugin conflicts<\/strong><\/p>\n\n\n\n Sometimes another plugin interferes with your email setup and blocks outgoing messages. If emails suddenly stop after installing or updating a plugin, that\u2019s a strong clue.<\/p>\n\n\n\n These errors might look technical, but most of them come down to a few common causes: server restrictions, missing authentication, or something blocking the connection.<\/p>\n\n\n\n WordPress email delivery problems always appear randomly. You will notice them when emails go missing, forms stop notifying, and customers never receive their confirmations. By the time you notice, the damage is already done.<\/p>\n\n\n\n Post SMTP gives you everything you need to stay ahead of it: a full diagnostic toolkit, real-time failure alerts, detailed delivery logs, and a Failed Emails Fallback so nothing slips through. Install it, run a test, and know exactly where your email stands.<\/p>\n\n\n\n You can unlock all features by upgrading to Post SMTP Pro to take full control of your email deliverability.<\/p>\n\n\n\n WordPress Email Delivery issues are among the most common ones anyone can […]<\/p>\n","protected":false},"author":6276,"featured_media":221605,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":"none","_seopress_titles_title":"Troubleshoot WordPress Email Delivery Issues Guide %%sep%% %%sitetitle%%","_seopress_titles_desc":"Troubleshoot WordPress email delivery issues with Post SMTP. 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It sends an email through your mailer and logs the result instantly. If something's wrong, the log tells you exactly where it failed. You can follow it up with the Diagnostic Test for a detailed check.\";}i:2;a:2:{s:8:\"question\";s:39:\"How often should I clean my email list?\";s:6:\"answer\";s:147:\"Every three months is a reasonable baseline. Inactive and bouncing addresses drag down your open rates and damage your sender reputation over time.\";}i:3;a:2:{s:8:\"question\";s:61:\"Can changing my hosting provider solve email delivery issues?\";s:6:\"answer\";s:363:\"Sometimes, but only if your host is the actual problem. If Post SMTP's Connectivity Test shows all SMTP ports blocked, your host is likely the bottleneck. Keeping that into consideration, switching hosting providers won't fix authentication failures or sender reputation, which follow your domain. Always diagnose with Post SMTP first before making any decisions.\";}i:4;a:2:{s:8:\"question\";s:113:\"Is it better to use a third-party email service or my hosting provider\u2019s email service for my WordPress emails?\";s:6:\"answer\";s:286:\"Third-party every time. Hosting providers' infrastructure is shared, unoptimized, and far more likely to land in spam. Dedicated services like SendGrid, Mailgun, or Brevo are built for email deliverability. Post SMTP connects to all of them and gives you one place to manage everything.\";}}}i:1;a:13:{s:32:\"_seopress_pro_rich_snippets_type\";s:8:\"articles\";s:40:\"_seopress_pro_rich_snippets_article_type\";s:7:\"Article\";s:41:\"_seopress_pro_rich_snippets_article_title\";s:63:\"Troubleshoot WordPress Email Delivery Issues Guide - Post SMTP \";s:40:\"_seopress_pro_rich_snippets_article_desc\";s:137:\"Troubleshoot WordPress email delivery issues with Post SMTP. Fix SMTP errors, improve inbox placement, and ensure reliable email sending.\";s:42:\"_seopress_pro_rich_snippets_article_author\";s:0:\"\";s:39:\"_seopress_pro_rich_snippets_article_img\";s:137:\"https:\/\/postmansmtp-live.s3.amazonaws.com\/wp-content\/uploads\/2026\/04\/blog_troubleshoot-wordpress-email-delivery-issues_Feature-Image.webp\";s:45:\"_seopress_pro_rich_snippets_article_img_width\";s:4:\"2500\";s:46:\"_seopress_pro_rich_snippets_article_img_height\";s:4:\"1309\";s:55:\"_seopress_pro_rich_snippets_article_coverage_start_date\";s:0:\"\";s:55:\"_seopress_pro_rich_snippets_article_coverage_start_time\";s:0:\"\";s:53:\"_seopress_pro_rich_snippets_article_coverage_end_date\";s:0:\"\";s:53:\"_seopress_pro_rich_snippets_article_coverage_end_time\";s:0:\"\";s:58:\"_seopress_pro_rich_snippets_article_speakable_css_selector\";s:0:\"\";}}"],"_seopress_social_fb_img":["https:\/\/postmansmtp-live.s3.amazonaws.com\/wp-content\/uploads\/2026\/04\/blog_troubleshoot-wordpress-email-delivery-issues_Feature-Image.webp"],"_seopress_social_fb_img_attachment_id":["221605"],"_seopress_social_fb_img_width":["2500"],"_seopress_social_fb_img_height":["1309"],"_seopress_social_twitter_img":["https:\/\/postmansmtp-live.s3.amazonaws.com\/wp-content\/uploads\/2026\/04\/blog_troubleshoot-wordpress-email-delivery-issues_Feature-Image.webp"],"_seopress_social_twitter_img_attachment_id":["221605"],"_seopress_social_twitter_img_width":["2500"],"_seopress_social_twitter_img_height":["1309"],"_uagb_toc_options":["a:2:{s:17:\"_uagb_toc_version\";s:10:\"1777386361\";s:18:\"_uagb_toc_headings\";a:17:{i:0;a:4:{s:5:\"level\";i:2;s:2:\"id\";s:64:\"what-are-wordpress-email-delivery-issues-and-their-common-causes\";s:7:\"content\";s:64:\"What are WordPress Email Delivery Issues and Their Common Causes\";s:5:\"depth\";i:2;}i:1;a:4:{s:5:\"level\";i:3;s:2:\"id\";s:54:\"common-causes-of-wordpress-email-deliverability-issues\";s:7:\"content\";s:54:\"Common Causes of WordPress Email Deliverability Issues\";s:5:\"depth\";i:3;}i:2;a:4:{s:5:\"level\";i:2;s:2:\"id\";s:65:\"what-to-look-for-in-a-wordpress-smtp-plugin-to-fix-email-delivery\";s:7:\"content\";s:66:\"What to Look for in a WordPress SMTP Plugin to Fix Email Delivery?\";s:5:\"depth\";i:2;}i:3;a:4:{s:5:\"level\";i:2;s:2:\"id\";s:56:\"how-you-can-troubleshoot-wordpress-email-delivery-issues\";s:7:\"content\";s:56:\"How You Can Troubleshoot WordPress Email Delivery Issues\";s:5:\"depth\";i:2;}i:4;a:4:{s:5:\"level\";i:3;s:2:\"id\";s:53:\"fix-1-install-post-smtp-and-configure-mailer-settings\";s:7:\"content\";s:54:\"Fix 1: Install Post SMTP and Configure Mailer Settings\";s:5:\"depth\";i:3;}i:5;a:4:{s:5:\"level\";i:3;s:2:\"id\";s:40:\"fix-2-validate-recipient-email-addresses\";s:7:\"content\";s:41:\"Fix 2: Validate Recipient Email Addresses\";s:5:\"depth\";i:3;}i:6;a:4:{s:5:\"level\";i:3;s:2:\"id\";s:60:\"fix-3-identify-deliverability-issues-with-a-spam-score-check\";s:7:\"content\";s:61:\"Fix 3: Identify Deliverability Issues with a Spam Score Check\";s:5:\"depth\";i:3;}i:7;a:4:{s:5:\"level\";i:3;s:2:\"id\";s:30:\"fix-4-resolve-api-key-problems\";s:7:\"content\";s:31:\"Fix 4: Resolve API Key Problems\";s:5:\"depth\";i:3;}i:8;a:4:{s:5:\"level\";i:3;s:2:\"id\";s:26:\"fix-5-fix-your-dns-records\";s:7:\"content\";s:27:\"Fix 5: Fix Your DNS Records\";s:5:\"depth\";i:3;}i:9;a:4:{s:5:\"level\";i:3;s:2:\"id\";s:36:\"fix-6-rebuild-your-sender-reputation\";s:7:\"content\";s:37:\"Fix 6: Rebuild Your Sender Reputation\";s:5:\"depth\";i:3;}i:10;a:4:{s:5:\"level\";i:3;s:2:\"id\";s:43:\"fix-7-enable-failed-emails-fallback-feature\";s:7:\"content\";s:44:\"Fix 7: Enable Failed Emails Fallback Feature\";s:5:\"depth\";i:3;}i:11;a:4:{s:5:\"level\";i:3;s:2:\"id\";s:29:\"fix-8-run-a-connectivity-test\";s:7:\"content\";s:30:\"Fix 8: Run a Connectivity Test\";s:5:\"depth\";i:3;}i:12;a:4:{s:5:\"level\";i:3;s:2:\"id\";s:36:\"resend-failed-emails-using-post-smtp\";s:7:\"content\";s:36:\"Resend Failed Emails using Post SMTP\";s:5:\"depth\";i:3;}i:13;a:4:{s:5:\"level\";i:2;s:2:\"id\";s:51:\"how-to-enable-wordpress-debug-mode-for-email-issues\";s:7:\"content\";s:51:\"How to Enable WordPress Debug Mode for Email Issues\";s:5:\"depth\";i:2;}i:14;a:4:{s:5:\"level\";i:2;s:2:\"id\";s:47:\"common-wordpress-email-errors-and-their-meaning\";s:7:\"content\";s:47:\"Common WordPress Email Errors and Their Meaning\";s:5:\"depth\";i:2;}i:15;a:4:{s:5:\"level\";i:2;s:2:\"id\";s:42:\"start-troubleshooting-with-post-smtp-today\";s:7:\"content\";s:42:\"Start Troubleshooting with Post SMTP Today\";s:5:\"depth\";i:2;}i:16;a:4:{s:5:\"level\";i:2;s:2:\"id\";s:29:\"faqs-wordpress-email-delivery\";s:7:\"content\";s:31:\"FAQs - 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\n
Common Causes of WordPress Email Deliverability Issues<\/strong><\/h3>\n\n\n\n
\n
\n
\n
What to Look for in a WordPress SMTP Plugin to Fix Email Delivery?<\/strong><\/h2>\n\n\n\n
\n
How You Can Troubleshoot WordPress Email Delivery Issues<\/strong><\/h2>\n\n\n\n
\n
Fix 1: Install Post SMTP and Configure Mailer Settings<\/strong><\/h3>\n\n\n\n
\n
![\"WordPress](\"https:\/\/postmansmtp-live.s3.amazonaws.com\/wp-content\/uploads\/2026\/04\/go-to-the-plugins-option.webp\")
<\/figure>\n\n\n\n\n
![\"Clicking](\"https:\/\/postmansmtp-live.s3.amazonaws.com\/wp-content\/uploads\/2026\/04\/click-on-install-now-button.webp\")
<\/figure>\n\n\n\n\n
![\"Post](\"https:\/\/postmansmtp-live.s3.amazonaws.com\/wp-content\/uploads\/2026\/04\/redirected-to-the-post-smtp-setup-wizard.webp\")
<\/figure>\n\n\n\n\n
![\"Configure](\"https:\/\/postmansmtp-live.s3.amazonaws.com\/wp-content\/uploads\/2026\/04\/configure-mailer-settings.webp\")
<\/figure>\n\n\n\n\n
Fix 2: Validate Recipient Email Addresses<\/strong><\/h3>\n\n\n\n
![\"Email](\"https:\/\/postmansmtp-live.s3.amazonaws.com\/wp-content\/uploads\/2026\/04\/specific-address-keeps-failing.webp\")
<\/figure>\n\n\n\nFix 3: Identify Deliverability Issues with a Spam Score Check<\/strong><\/h3>\n\n\n\n
![\"Post](\"https:\/\/postmansmtp-live.s3.amazonaws.com\/wp-content\/uploads\/2026\/04\/post-smtp-dashboard.webp\")
<\/figure>\n\n\n\n![\"Redirected](\"https:\/\/postmansmtp-live.s3.amazonaws.com\/wp-content\/uploads\/2026\/04\/redirected-to-spam-score-checker.webp\")
<\/figure>\n\n\n\n![\"Start](\"https:\/\/postmansmtp-live.s3.amazonaws.com\/wp-content\/uploads\/2026\/04\/begin-testing-your-spam-score.webp\")
<\/figure>\n\n\n\n![\"Email](\"https:\/\/postmansmtp-live.s3.amazonaws.com\/wp-content\/uploads\/2026\/04\/email-spam-score-report.webp\")
<\/figure>\n\n\n\nFix 4: Resolve API Key Problems<\/strong><\/h3>\n\n\n\n
Fix 5: Fix Your DNS Records<\/strong><\/h3>\n\n\n\n
![\"Diagnostic](\"https:\/\/postmansmtp-live.s3.amazonaws.com\/wp-content\/uploads\/2026\/04\/diagnostic-test-tool.webp\")
<\/figure>\n\n\n\nFix 6: Rebuild Your Sender Reputation<\/strong><\/h3>\n\n\n\n
![\"Email](\"https:\/\/postmansmtp-live.s3.amazonaws.com\/wp-content\/uploads\/2026\/04\/email-reporting-option.webp\")
<\/figure>\n\n\n\n![\"Weekly](\"https:\/\/postmansmtp-live.s3.amazonaws.com\/wp-content\/uploads\/2026\/04\/weekly-report-covering-emails-sent.webp\")
<\/figure>\n\n\n\n![\"Notification](\"https:\/\/postmansmtp-live.s3.amazonaws.com\/wp-content\/uploads\/2026\/04\/post-smtp-notification-settings.webp\")
<\/figure>\n\n\n\nFix 7: Enable Failed Emails Fallback Feature<\/strong><\/h3>\n\n\n\n
![\"Fallback](\"https:\/\/postmansmtp-live.s3.amazonaws.com\/wp-content\/uploads\/2026\/04\/post-smtp-fallback-settings.webp\")
<\/figure>\n\n\n\n![\"Enable](\"https:\/\/postmansmtp-live.s3.amazonaws.com\/wp-content\/uploads\/2026\/04\/enable-use-fallback.webp\")
<\/figure>\n\n\n\nFix 8: Run a Connectivity Test<\/strong><\/h3>\n\n\n\n
![\"Post](\"https:\/\/postmansmtp-live.s3.amazonaws.com\/wp-content\/uploads\/2026\/04\/post-smtp-connectivity-test.webp\")
<\/figure>\n\n\n\nResend Failed Emails using Post SMTP<\/strong><\/h3>\n\n\n\n
\n
![\"Confirmation](\"https:\/\/postmansmtp-live.s3.amazonaws.com\/wp-content\/uploads\/2026\/04\/post-smtp-is-configured.webp\")
<\/figure>\n\n\n\n\n
![\"Access](\"https:\/\/postmansmtp-live.s3.amazonaws.com\/wp-content\/uploads\/2026\/04\/access-the-entire-email-logs.webp\")
<\/figure>\n\n\n\n\n
How to Enable WordPress Debug Mode for Email Issues<\/strong><\/h2>\n\n\n\n
\n
![\"Open](\"https:\/\/postmansmtp-live.s3.amazonaws.com\/wp-content\/uploads\/2026\/04\/enter-advanced-file-manager.webp\")
<\/figure>\n\n\n\n\n
![\"Locate](\"https:\/\/postmansmtp-live.s3.amazonaws.com\/wp-content\/uploads\/2026\/04\/look-for-wp-config-php.webp\")
<\/figure>\n\n\n\n\n
![\"Select](\"https:\/\/postmansmtp-live.s3.amazonaws.com\/wp-content\/uploads\/2026\/04\/select-code-editor.webp\")
<\/figure>\n\n\n\n\n
![\"Scroll](\"https:\/\/postmansmtp-live.s3.amazonaws.com\/wp-content\/uploads\/2026\/04\/scroll-down-till-you-find-debug-code.webp\")
<\/figure>\n\n\n\n\n
Common WordPress Email Errors and Their Meaning<\/strong><\/h2>\n\n\n\n
Start Troubleshooting with Post SMTP Today<\/strong><\/h2>\n\n\n\n
FAQs – WordPress Email Delivery<\/strong><\/h2>\n\n\n","protected":false},"excerpt":{"rendered":"