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PluginUpdated

Post SMTP (Free Activated)

by Post SMTPv4.0.2Unlimited sites

Post SMTP is a WordPress plugin from Post SMTP that sends your site's email through an authenticated SMTP connection instead of the default PHP mail function.

Product facts

Version
4.0.2
Released
23 October 2026
Type
Plugin
Licence
GPL
Included in
Every plan

Overview

WordPress sends email with the PHP mail function by default, and those messages often land in spam or never arrive. Post SMTP swaps that for a properly authenticated SMTP connection. Form submissions, notifications and newsletters then go out through a service you choose, such as Gmail, Microsoft 365, Amazon SES or SendGrid.

Setup runs through a guided wizard that walks you through connecting your SMTP account, so you do not need much technical background. After that, detailed logs and error tracking show what was sent and what failed, and backup SMTP servers can take over if your main service goes down. It fits sites that depend on email reaching people reliably.

Features

  • Authenticated SMTP sending: Replaces the default PHP mail function with a properly authenticated SMTP connection, which helps your messages reach inboxes instead of spam folders.
  • Major SMTP providers: Works with services such as Gmail, Microsoft 365, Amazon SES and SendGrid, so you can pick the sending service that suits your site.
  • Guided setup wizard: A step-by-step assistant helps you connect your SMTP account and configure settings, which keeps setup manageable for users with little technical knowledge.
  • Detailed email logs: Logs record the emails your site sends so you can check delivery status, troubleshoot problems and keep track of your communications.
  • Real-time error tracking: Error reporting and notifications point out email sending problems so you can find and fix them before they affect your visitors or customers.
  • Backup SMTP servers: Switch to an alternate SMTP server when your main service has downtime, so email delivery can continue without interruption.
  • OAuth 2.0 authentication: Supports modern OAuth protocols for secure authentication with providers like Gmail, which keeps your connection secure.
  • Customizable email headers: Personalize email headers to match your branding or technical needs, which can improve how your messages are recognized.

Best for

  • WordPress sites that rely on form submission emails
  • Site owners who want to track email delivery problems
  • Users with minimal technical knowledge setting up SMTP

Changelog

Version 4.0.2 — 24 September 2026

  • Security Resolved Stored DOM-Based Cross-Site Scripting (XSS) vulnerability in failed email logs on WordPress Multisite.
  • Fixed Resolved fatal error during All-In-One Security (AIOS) unlock email requests.
  • Fixed Prevented redundant wp_posts database queries on AJAX requests to improve performance.
  • Fixed Resolved infinite and duplicate email log generation during mailer and fallback failures.
  • Fixed Corrected email tracking status assignment between primary and fallback mailer logs.
  • Fixed Fixed issue where attachments were missing from fallback mailer logs.
  • Fixed Prevented duplicate failed email log entries from being created on email failures.
  • Fixed Fixed button alignment and cut-off issues in the Bulk Resend popup modal.
  • Fixed Fixed numeric metric alignment and spacing in the Email Reporting section.

Earlier versions

  • 4.0.1 (25 August 2026): 1 fixed
  • 3.9.5 (24 June 2026): 1 improved
  • 3.9.1 (1 April 2026): 1 improved, 5 fixed

FAQ

Is Post SMTP (Free Activated) free?

The code of Post SMTP (Free Activated) is licensed under the GPL, so anyone may use, change and share it. Buy GPL is a paid service: a plan gives you the download and its updates. The developer's own support, licence key and online services are not included.

Which version of Post SMTP (Free Activated) is this?

Version 4.0.2, released 23 October 2026. New versions appear here when the developer publishes them.

How do I update Post SMTP (Free Activated)?

Install Buy GPL Updater on your site and paste your key from My Account. It installs new versions of Post SMTP (Free Activated) for you.