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WP Mail SMTP Pro Changelog

Every recorded version, newest first, with what changed in each one.

Latest 4.10.3 · Oct 20, 202615 versionsSince Aug 2024

2026 · 6 versions

  1. 4.10.3

    Latest
    1 improvement
    Improved
    • Improved the Setup Wizard steps.

  2. 4.10.2

    1 improvement2 changes
    Improved
    • Improved translations across the admin area and the emails the plugin sends.
    Changes
    • Setup Wizard now returns to the Dashboard page instead of Settings when it is finished or closed.
    • A "Class not found" fatal error could occur right after updating the plugin on sites with PHP OPcache enabled.

  3. 4.10.1

    1 improvement3 changes
    Improved
    • Improved security and privacy across the plugin, including temporary file storage and requests to external services.
    Changes
    • Some Setup Wizard labels and the Lite install date in Site Health could not be translated.
    • The Posts, Pages and post editor screens failed with a fatal error on hosts without the PHP intl extension when another plugin, such as All in One SEO, used the intl IDN functions while the Gmail mailer was in use.
    • SMTP2GO webhooks showed "Subscription is broken" after a successful subscribe, and subscribing again failed.

  4. 4.10.0

    1 new1 improvement11 changes
    New
    • New Dashboard page, now the default screen for WP Mail SMTP, with email statistics, a setup overview, connection status, and recommended next steps.
    Improved
    • Updated Action Scheduler library to 4.1.0.
    Changes
    • Setup Checklist: a new page that guides you through connecting a mailer, sending a test email, and the rest of your email setup, with progress tracked automatically.
    • Email Detective: a new tab on the Tools page that sends a test email through your primary connection and emails you a free deliverability report covering authentication, blocklists, and spam filter scoring.
    • Setup Wizard now verifies your mailer settings with your email provider before saving them, and guides you through each mailer's required settings as numbered steps.
    • Setup Wizard's email test now reports the exact sending error with the fix steps for it, names the setting at fault where it can be identified, and shows the domain checker results.
    • Email Reports failed with a fatal error when the page was opened with a malformed custom date range.
    • A database error was logged and the Dashboard widget's email error alert never appeared on sites whose MySQL server treats double quotes as identifiers (ANSI_QUOTES mode).
    • Queued emails stopped being sent, with no notice, when Action Scheduler reported its setup as incomplete.
    • The Setup Wizard's test email did not send while the "Do Not Send" option was enabled.
    • The Pro update notice reappeared after the plugin had already been updated.
    • PHP deprecation notices were logged when exporting email logs to CSV on PHP 8.4 and newer.
    • Hardened permission checks and request handling across several admin features to address potential security issues.

  5. 4.9.0

    2 improvements12 changes
    Improved
    • Improved error handling and troubleshooting guidance when an email fails to send.
    • Updated Action Scheduler library to 4.0.0.
    Changes
    • WP-CLI commands to configure WP Mail SMTP from the command line, including SMTP and API-key mailer setup, individual setting management, and alert provider configuration.
    • Code Snippets tab on the Tools page to browse, preview, and install WP Mail SMTP's WPCode snippets.
    • Support for the WordPress Abilities API (WordPress 6.9), letting connected tools and AI assistants securely read your email logs, sending statistics, and debug events.
    • Confirmation prompt before enabling the "Hide Email Delivery Errors" option, so the setting is not turned on by accident.
    • The WPMS_LOG_BLOCKED_EMAILS constant in wp-config.php did not affect the Log Blocked Emails setting; defining the constant now correctly enforces the value, disables the option in the admin area, and shows a notice indicating it is set by a constant.
    • AWS SES mailer triggered a PHP `is_readable` warning when reading AWS config files on servers with an `open_basedir` restriction.
    • Failed email alerts linked to the wrong Email Log entry when a backup mailer succeeded after the primary failed; the alert now links to the failed primary's Email Log entry instead of the backup's success entry.
    • Hosts using database read replicas could show duplicate Email Log entries and missing error details.
    • Alert notifications flooded scheduled actions and external channels during provider outages; automatic alerts are now limited to one notification every 5 minutes.
    • The "Last week" stat in the Lite weekly summary email showed the just-started current week's count instead of the actual previous week's total, because the email is sent on Monday at 2pm.
    • Connecting the Zoho mailer could trigger a fatal error when Zoho returned an unexpected account response.
    • Hardened permission checks and request handling across several admin and alert features to address potential security issues.

  6. 4.8.0

    1 improvement3 changes
    Improved
    • Improved plugin security.
    Changes
    • SendLayer Quick Connect - allows connecting to SendLayer without DNS setup in 2 minutes.
    • Fatal TypeError on PHP 8.x when Outlook One-Click OAuth token expires.
    • JavaScript error when adding the 10th or more smart routes.

2025 · 6 versions

  1. 4.7.1

    2 changes
    Changes
    • Text domain in a couple of strings.
    • Switched Return-Path option to enabled by default to align with WordPress core.

  2. 4.7.0

    1 new2 changes
    New
    • New transactional mailer: Resend integration.
    Changes
    • Recurring task filling up task meta table.
    • Outlook one-click setup redirection after authentication.

  3. 4.6.0

    1 new2 changes
    New
    • New transactional mailer: Mandrill integration.
    Changes
    • Incorrect deliverability verification webhook status for SMTP.com mailer.
    • References and In-Reply-To email headers are now correctly preserved for API-based mailers.

  4. 4.5.0

    1 new1 improvement6 changes
    New
    • New transactional mailer: MailerSend integration.
    Improved
    • Updated the list of conflicting plugins (added Site Mailer, SureMail, Gravity SMTP).
    Changes
    • IMPORTANT
    • Support for PHP 7.2 has been discontinued. If you are running this version, you MUST upgrade PHP before installing or upgrading to WP Mail SMTP v4.5. Failure to do that will disable WP Mail SMTP functionality.
    • WhatsApp integration for the Alerts feature.
    • Filter that allows to change Amazon SES mailer email sending request arguments.
    • Ability to store email logs if "Do Not Send" option is enabled.
    • Microsoft Outlook basic auth deprecation notice dismissal.

  5. 4.4.0

    4 changes
    Changes
    • Push notifications channel for the Alerts feature.
    • SMTP.com emails delivery status verification via webhooks.
    • Emails queue runner Action Scheduler task deadlock issue.
    • Rate limiting for the emails resend feature.

  6. 4.3.1

    2 changes
    Changes
    • Email Log and Reports search if subject contains special characters like ampersand.
    • Undefined array key "wp_mail_smtp_reports_widget_pro" warning in the dashboard widget.

2024 · 3 versions

  1. 4.3.0

    1 new3 changes
    New
    • New transactional mailer: Elastic Email integration.
    Changes
    • One-click setup for Outlook mailer (the easiest way to set up Outlook mailer).
    • The "Tools -> Scheduled Actions" menu is now always visible when WooCommerce or the Action Scheduler plugin is active.
    • SMTP password and username fields ignored `WPMS_SMTP_AUTH` constant.

  2. 4.2.0

    2 new2 improvements4 changes
    New
    • New transactional mailer: Mailjet integration.
    • New Zoho region: Canada.
    Improved
    • Improved security for sensitive data (API keys).
    • Improved performance of Email Logs and Email Reports queries.
    Changes
    • Discord integration for the Alerts feature.
    • Fatal error on the Alerts screen when alert title translation are missing.
    • SMTP2GO mailer special characters handling in from name.
    • Incomplete CSV and XLSX email log export.

  3. 4.1.1

    1 improvement4 changes
    Improved
    • Improved Weekly Summary Email sending.
    Changes
    • Delete `wp-mail-smtp` uploads folder on plugin uninstall, if the "Misc > Uninstall" option is enabled.
    • Decreased `PHPMailer` timeout value to 30 seconds from 5 minutes.
    • Missing Reply-To support in SMTP2GO mailer.
    • Setup Wizard translations not working correctly.

Changelog published by the developer, in their original language.