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Download Post SMTP v3.9.1

Plugins > Plugins Premium
Automatic updates Yes
Version 3.9.1
Updated on
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Post SMTP
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Post SMTP is a WordPress plugin, ensuring your emails are delivered, not lost. It replaces the default WordPress SMTP library, offering advanced features like OAuth 2.0, and detailed email logs. With its intuitive interface, it simplifies email configuration, providing reliability, and peace of mind. Enhance your email deliverability, effortlessly, with Post SMTP.

How to download Post SMTP

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Core Features of Post SMTP

  • Email Logging: Keeps a record of all emails sent from your WordPress site.
  • SMTP Support: Provides support for sending emails via SMTP, ensuring reliable email delivery.
  • OAuth 2.0 Support: Allows secure authentication with email providers using OAuth 2.0.
  • API Integrations: Supports integration with popular email APIs like SendGrid, Mailgun, and more.
  • Fallback Mailing: Offers a fallback mailing option if the primary method fails.
  • Notifications: Sends notifications when emails fail to send, helping you troubleshoot issues.
  • Multisite Support: Compatible with WordPress multisite installations.
  • Easy Setup Wizard: Provides a step-by-step setup wizard for easy configuration.
  • Debugging Tools: Includes tools to help diagnose and fix email delivery issues.
  • Secure Connection: Supports SSL/TLS encryption for secure email transmission.

List of improvements in Post SMTP version 3.9.1

  • = 3.9.1 – April 01, 2026 =
  • TWEAK – Updated Emailit API to v2.
  • FIX – Added Header support in Maileroo.
  • FIX – Resolved qrstr class conflict.
  • FIX – Emailit API status handling (status code 201 was incorrectly marked as failed instead of pending/successful).
  • FIX – Resolved fatal error: Class “HTMLPurifier_Config” not found.
  • FIX – Fixed SMTP2GO false positive response.
  • = 3.9.0 – Mar 17, 2026 =
  • TWEAK – Updated the Setup Wizard UI for Mailers and improved related content.
  • FIX – Resolved REST error: rest_cookie_invalid_nonce (Cookie check failed – 403).
  • FIX – Added support for the pre_wp_mail function for custom implementations via functions.php.
  • FIX – Corrected an issue where submitted notification URLs were passed through esc_url, which escaped HTML entities (such as &) intended only for display.
  • FIX – Resolved an issue where the Post SMTP email logger did not display all recipients.
  • FIX – Fixed missing line breaks in the mail log content.
  • FIX – Resolved the Initial Setup Wizard issue that allowed incorrect email acceptance on the wizard screen.
  • FIX – Addressed missing authorization for Authenticated (Subscriber+) Office 365 OAuth configuration overwrite.
  • = 3.8.0 – Jan 20, 2026 =
  • NEW – Added [Sweego]( as an email service provider.
  • NEW – Introduced the “Send Test Notification” feature for Post SMTP failure alerts.
  • TWEAK – Added a hide option for wp_mail conflict notice.
  • FIX – PHPMailer with “Log Only” mode was sending emails.
  • FIX – Corrected improper call to the function _load_textdomain_just_in_time.
  • FIX – Fixed redirection issue that incorrectly navigated users to the Post SMTP settings page.
  • = 3.7.0 Dec 24, 2025 =
  • NEW – Added Mailtrap.io as an email service provider.
  • FIX – The PHPMailerException already exist.
  • FIX – Call to undefined method QRcode.
  • FIX – Emailit API Emails were going without From name
  • = 3.6.3 Dec 17, 2025 =
  • FIX Escape email content.
  • = 3.6.2 Nov 24, 2025 =
  • IMPROVEMENT Added PHP 8+ compatibility.
  • FIX Added authorization checks related to OAuth token updates for authenticated users.
  • = 3.6.1 – Oct 29, 2025 =
  • IMPROVEMENT: Removed GIF from the plugin to enhance performance and reduce load time.
  • IMPROVEMENT: Increased the request timeout for email sending to improve reliability and prevent timeouts.
  • FIX: Resolved a missing authorization vulnerability.
  • FIX: Addressed a WordPress error triggered when accessing the plugin settings page due to conflict with another theme/ plugin.
  • = 3.6.0 – Oct 14, 2025 =
  • NEW – Added [Maileroo]( as an email service provider.
  • TWEAK – Enhanced Setup Wizard content for better user guidance.
  • TWEAK – Added a “Notify” button on the WordPress dashboard.
  • IMPROVEMENT – Updated multiple recipient view in email logs for better clarity.
  • FIX – Resolved undefined property issue in Post SMTP report after update.
  • FIX – Fixed “Limit Exceeded” error during Email DNS test.
  • FIX – Corrected failed message entries in logs.
  • FIX – Resolved issue with “Save Password” reappearing unexpectedly.
  • FIX – Fixed changelog display issue in Post SMTP.
  • FIX – Addressed PHPMailer BCC and CC handling issues.
  • FIX – Fixed host impersonation domain name issue.
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