Fatal PHP error on WP version 5.2 and lower (missing wp_timezone function). Weekly Summary Email sending when migration code didn't trigger. Network subsite switcher in WP Multisite installations with subdomain configuration. Debug Events double-entry DB save, because of a bug in is_email_sent method for certain mailers. Added missing is_email_sent filters for Sendinblue, Mailgun, and Gmail mailers. New user registration email template for Email Controls feature. PHP extension mb_strings not polyfilled correctly. Blurry image assets in Weekly Email Summary. Added SSL check for Amazon SES and Outlook mailers in the Setup Wizard. Amazon SES automatic closest region detection (keycdn API request). Email Source detection in Debug Events and Email Log for file paths with backslashes. It now removes all plugin DB data and tables. Improved Email Source detection in Debug Events and Email Log for WP Core sent emails. Improved Weekly Email Summary Setup Wizard control. Support for string attachments (added via PHPMailer object). Email Log: added CC and BCC columns to the table. New transactional mailer: Postmark integration. Early plugin deactivation issue with activity log plugins. Plugin constants integration in Setup Wizard. One-click migration from FluentSMTP plugin. New transactional mailer: SparkPost integration. PHP 8 compatibility when existing Gmail mailer connection is revoked. Debug Events' screen options visible on general Tools page. DB tables row in Site Health Info section is now private. Non-network admin was allowed to change the Debug Event setting, if network-wide setting was enabled.
Email Log: resend issue with incorrectly stored headers. PHP deprecated notices in Sendinblue library (PHP 7.4+). Updated Action Scheduler library to 3.4.0. Improved debug error message for the Other SMTP mailer in Debug Events. Domain verification process for AWS SES mailer (now using DKIM verification instead of the simple TXT record verification). Updated the list of conflicting plugins (added FluentSMTP and WP HTML Mail). Email Log: improved sent status verification accuracy with webhooks for:, Sendiblue, Mailgun, Postmark and SparkPost. Email Log: sent status verification AS tasks for Postmark and SparkPost. Failure to do that will disable WP Mail SMTP functionality. If you are using one of those versions, you MUST upgrade WordPress before installing or upgrading to WP Mail SMTP v3.3. Support for WordPress versions 5.1.x or lower has been discontinued. Demo WP Mail SMTP Pro WordPress Plugin WP Mail SMTP Pro WordPress Plugin Changelog v3.3.0