Post SMTP Pro v1.5.2

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Post SMTP is the most trusted PHP Mailer Plugin for WordPress. It improves email deliverability by routing emails through a reliable SMTP server. It also provides features like email logging, authentication (OAuth), notification, configuration testing, and more.

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Post SMTP Pro v1.4.5
= 1.4.5 - Nov 25, 2025 =
* IMPROVEMENT - Added PHP 8+ compatibility.
* FIX - Added authorization checks related to OAuth token updates for authenticated users.

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Post SMTP Pro Free v3.9.0 + Pro v1.5.1

• 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...

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Post SMTP Pro v1.5.2
== Changelog ==

= 1.5.1 – Mar 12, 2026 =
* FIX – Post SMTP <= 3.8.0 – Missing authorization for Authenticated (Subscriber+) Office 365 OAuth configuration overwrite.
* FIX – Resolved REST error: {"code":"rest_cookie_invalid_nonce","message":"Cookie check failed","data":{"status":403}}.

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