Post SMTP · Version history
Post SMTP changelog and version history
- Latest version
- 4.0.2
- Sep 24, 2026 (1 month ago)
- Releases
- 179
- since 2018
- In the last year
- 13
- about one every 24 days
- Tested up to
- WordPress 7.1.4
- PHP 7.1 or later
Releases each year
- 201811 releases
- 201910 releases
- 202010 releases
- 20217 releases
- 202231 releases
- 202357 releases
- 202421 releases
- 202522 releases
- 202610 releases
202610 releases
Post SMTP 4.0.2Latest
- Security – Resolved Stored DOM-Based Cross-Site Scripting (XSS) vulnerability in failed email logs on WordPress Multisite.
- Fix – Resolved fatal error during All-In-One Security (AIOS) unlock email requests.
- Fix – Prevented redundant wp_posts database queries on AJAX requests to improve performance.
- Fix – Resolved infinite and duplicate email log generation during mailer and fallback failures.
- Fix – Corrected email tracking status assignment between primary and fallback mailer logs.
- Fix – Fixed issue where attachments were missing from fallback mailer logs.
- Fix – Prevented duplicate failed email log entries from being created on email failures.
- Fix – Fixed button alignment and cut-off issues in the Bulk Resend popup modal.
- Fix – Fixed numeric metric alignment and spacing in the Email Reporting section.
Post SMTP 4.0.1
- Rolled back from 4.0.0-beta.1
Post SMTP 3.9.5
- TWEAK – Updated dashboard banners and removed the Extensions screen from the plugin menu.
Post SMTP 4.0.0-beta.1
Post SMTP 3.9.4
- FIX – Resolved failed builds reported by Plugintests.com
- FIX – Addressed PHP deprecation notices related to using null as an array offset
- FIX – Fixed compatibility issues with the Google Site Kit plugin
- FIX – Resolved Elastic Email API errors causing Code: 400, Message: Bad Request due to missing required parameters
- FIX – Addressed PHP 8 deprecation warnings for improved compatibility
- FIX – Resolved a fatal error occurring when accessing Post SMTP → Settings
- FIX – Improved compatibility with WordPress 7.0 & resolve issues of 3.9.2 version
Post SMTP 3.9.3
- TWEAK – Rolled back to version 3.9.1 due to socket-related errors.
Post SMTP 3.9.2
- TWEAK – Added WordPress 7.0 compatibility.
- FIX – Addressed PHP deprecation notices related to using null as an array offset.
- FIX – Fixed compatibility issues with the Google Site Kit plugin.
Post SMTP 3.9.1
- 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.
Post SMTP 3.9.0
- 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.
Post SMTP 3.8.0
- 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.
202522 releases
Post SMTP 3.7.0
- 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
Post SMTP 3.6.3
- FIX – Escape email content.
Post SMTP 3.6.2
- IMPROVEMENT – Added PHP 8+ compatibility.
- FIX – Added authorization checks related to OAuth token updates for authenticated users.
Post SMTP 3.6.1
- 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.
Post SMTP 3.6.0
- 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.
- FIX – Removed unnecessary console logs from the admin dashboard.
Post SMTP 3.5.0
- NEW – Added Emailit email service providers.
- TWEAK – Wizard Send Test Email disble button till the email is being sent.
- TWEAK – Limited the scope of Gmail.
- IMPROVEMENT – PHP 8+ compatibility added.
- IMPROVEMENT – Dashboard widget UI improvement.
- FIX – Fallback mailer was not working.
- FIX – SendGrid attachments were not working in some cases.
- FIX – Resending emails to multiple recipients was not working in some cases.
- FIX – PHP warning was appearing in some cases.
- FIX – PHP error was appearing in some cases Uncaught Error: Call to a member function getFromEmailAddress().
Post SMTP 3.4.2
- Enhancement – Improved AJAX call security.
- Improvement – PHP 8+ version compatibility.
Post SMTP 3.4.1
- TWEAK – Updated Plugin URI in header
Post SMTP 3.4.0
- NEW – Added Resend email service providers.
- UPDATED: Feedback SDK to the latest version.
- TWEAK – Removed irrelevant notices from Post SMTP Wizard.
- FIX – BCC/ CC fails with Sparkpost.
- FIX – reply-to was not working with Gravit Forms notifications with SMTP2GO.
Post SMTP 3.3.0
- NEW – WP Dashboard Widget
- NEW – Diagnostic Report Send Form
- NEW – Mailersend Mailer Integration
- FIX – Added Validation In Domain Checker DNS, SPF, DMARC
- FIX – LOCO Translate Issue
- FIX – Email Summary Improvement
- FIX – Vulnerability Fix.
Post SMTP 3.2.0
- New – Introducing Email Tester to test your email deliverability.
- Fix – Removed id duplication in the Wizard.
Post SMTP 3.1.4
- FIX – To column in email logs was empty in some cases.
Post SMTP 3.1.3
- Enhancement: Email logs security enhancement.
Post SMTP 3.1.2
- Enhancement: Email logs security enhancement.
Post SMTP 3.1.1
- Fix: Raw HTML was sent when resending emails from the log section.
- Fix: AJAX error with some Form plugins.
Post SMTP 3.1.0
- New: Added SendGrid EU support.
- Optimization: Improved email reporting.
- Fix: Translation warning was appearing in some cases.
- Fix: Security enhancement.
- Fix: Prevent From Name was not working, if Prevent From Email was not enabled.
- Fix: Send Test was not appearing in Log Only mode.
Post SMTP 3.0.2
Post SMTP 3.0.2-beta.1
Post SMTP 3.0.1
Post SMTP 3.0.1-beta.1
Post SMTP 3.0.0
Post SMTP 3.0.0-rc.1
202421 releases
Post SMTP 2.9.14
Post SMTP 2.9.13
Post SMTP 2.9.12
Post SMTP 2.9.11
Post SMTP 2.9.10
Post SMTP 2.9.9
Post SMTP 3.0.0-beta.1
Post SMTP 2.9.8
Post SMTP 2.9.7
Post SMTP 2.9.6
Post SMTP 2.9.5
Post SMTP 2.9.4
Post SMTP 2.9.3
Post SMTP 2.9.2
Post SMTP 2.9.1
Post SMTP 2.9.0
Post SMTP 2.8.12
Post SMTP 2.8.11
Post SMTP 2.8.10
Post SMTP 2.8.9
Post SMTP 2.8.8
202357 releases
Post SMTP 2.8.7
Post SMTP 2.8.6
Post SMTP 2.8.5
Post SMTP 2.8.4
Post SMTP 2.8.3
Post SMTP 2.8.2
Post SMTP 2.8.1
Post SMTP 2.8.0
Post SMTP 2.7.3
Post SMTP 2.8.0-beta.1
Post SMTP 2.7.2
Post SMTP 2.7.1
Post SMTP 2.7.0
Post SMTP 2.6.2
Post SMTP 2.6.1
Post SMTP 2.6.0
Post SMTP 2.5.9.4
Post SMTP 2.5.9.3
Post SMTP 2.5.9.2
Post SMTP 2.5.9.1
Post SMTP 2.5.9.1-beta.1
Post SMTP 2.5.9
Post SMTP 2.5.9-beta.1
Post SMTP 2.5.8
Post SMTP 2.5.8-beta.1
Post SMTP 2.5.7
Post SMTP 2.5.6
Post SMTP 2.5.5
Post SMTP 2.5.4
Post SMTP 2.5.3
Post SMTP 2.5.2
Post SMTP 2.5.1
Post SMTP 2.5.0
Post SMTP 2.5-rc.4
Post SMTP 2.4.9
Post SMTP 2.4.8
Post SMTP 2.5-rc.3
Post SMTP 2.4.7
Post SMTP 2.5-rc.2
Post SMTP 2.4.6
Post SMTP 2.5-rc.1
Post SMTP 2.4.5
Post SMTP 2.5-beta.1
Post SMTP 2.4.4
Post SMTP 2.4.4-Beta.2
Post SMTP 2.4.4-Beta.1
Post SMTP 2.4.3
Post SMTP 2.4.2
Post SMTP 2.4.2-beta.2
Post SMTP 2.4.1
Post SMTP 2.4.2-beta.1
Post SMTP 2.4
Post SMTP 2.4-beta.1
Post SMTP 2.3.2
Post SMTP 2.3.2-beta.1
Post SMTP 2.3.1
Post SMTP 2.3
202231 releases
Post SMTP 2.2.3
Post SMTP 2.2.2
Post SMTP 2.2.1
Post SMTP 2.2
Post SMTP 2.2-beta.2
Post SMTP 2.1.10
Post SMTP 2.2-beta.1
Post SMTP 2.1.9
Post SMTP 2.1.8
Post SMTP 2.1.8-beta.1
Post SMTP 2.1.7
Post SMTP 2.1.6
Post SMTP 2.1.5
Post SMTP 2.1.4
Post SMTP 2.1.3
Post SMTP 2.1.4-rc.2
Post SMTP 2.1.4-rc.1
Post SMTP 2.1.4-beta.1
Post SMTP 2.1.2
Post SMTP 2.1.2-rc.2
Post SMTP 2.1.1.1
Post SMTP 2.1.2-rc.1
Post SMTP 2.1.2-beta.1
Post SMTP 2.1.1
Post SMTP 2.1
Post SMTP 2.1-beta.1
Post SMTP 2.0.27
Post SMTP 2.0.26
Post SMTP 2.0.25
Post SMTP 2.0.25-beta.1
Post SMTP 2.0.24
20217 releases
Post SMTP 2.0.23
Post SMTP 2.0.22
Post SMTP 2.0.21
Post SMTP 2.0.20
Post SMTP 2.0.19
Post SMTP 2.0.18
Post SMTP 2.0.17
202010 releases
Post SMTP 2.0.16
Post SMTP 2.0.15
Post SMTP 2.0.14
Post SMTP 2.0.13
Post SMTP 2.0.12
Post SMTP 2.0.11
Post SMTP 2.0.10
Post SMTP 2.0.9
Post SMTP 2.0.8
Post SMTP 2.0.7
201910 releases
Post SMTP 2.0.6
Post SMTP 2.0.5
Post SMTP 2.0.4
Post SMTP 2.0.3
Post SMTP 2.0.2
Post SMTP 2.0.1
Post SMTP 2.0
Post SMTP 1.9.8
Post SMTP 1.9.7
Post SMTP 1.9.6
201811 releases
Post SMTP 1.9.5
Post SMTP 1.9.4
Post SMTP 1.9.3
Post SMTP 1.9.2
Post SMTP 1.9.1
Post SMTP 1.9.0
Post SMTP 1.8.9
Post SMTP 1.8.8
Post SMTP 1.8.7
Post SMTP 1.8.6
Post SMTP 1.8.5
Questions about Post SMTP’s releases
What is the latest version of Post SMTP?
4.0.2, released on Sep 24, 2026 (1 month ago). It’s tested up to WordPress 7.1.4 and needs PHP 7.1 or later.
How often is Post SMTP updated?
13 releases in the last year, about one every 24 days. Its first release on WordPress.org dates from April 2018.
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Start freeRelease dates come from the day each version’s folder was made in Post SMTP’s WordPress.org SVN repository; the notes from its readme’s changelog, as its authors wrote it.