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Post SMTP is a WordPress plugin that replaces the default PHP mail system with a fully configured SMTP solution, ensuring your site’s emails are delivered reliably and avoid spam folders. It includes a setup wizard, detailed email logs, fallback mailing options, and support for all major SMTP services. Ideal for contact forms, WooCommerce notifications, membership emails, and other transactional messages, it provides peace of mind by giving you control over email delivery and tracking, while improving overall site reliability and user communication.

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  • We Purchased And Downloaded From Original Authors
  • 100% Clean & Original File
  • Product Version: 3.9.0
  • Last Updated: 2026-03-19
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What is Post SMTP?

WordPress uses the wp_mail() function by default, which relies on PHP mail and is often unreliable or blocked by hosts. Post SMTP replaces this with a proper SMTP configuration, using secure authentication and trusted mail services. This ensures that all transactional emails—order confirmations, notifications, password resets—are sent successfully and logged for monitoring.

Key Features

  • Setup Wizard: Walks you through selecting an SMTP provider, entering credentials, and testing the connection.
  • SMTP Mailer Support: Compatible with Gmail, Microsoft 365/Office 365, Amazon SES, Mailgun, SendGrid, Zoho Mail, and other SMTP providers.
  • Email Logs & Retrying: Records all outgoing emails with details such as recipient, subject, status, and errors; allows resending failed messages.
  • Fallback Mailer & Redundancy: Configurable secondary mailer to ensure emails are sent if the primary fails.
  • OAuth 2.0 Authentication: Supports API-based authentication without storing plain passwords.
  • Performance-Friendly Implementation: Replaces PHP mail in the background with minimal impact on site speed.

Typical Use Cases

  • WooCommerce stores sending order confirmations and shipping notifications.
  • Membership sites ensuring password reset and registration emails reach inboxes.
  • Blogs or business sites using contact forms, requiring monitoring and retrying of failed emails.
  • Multi-site WordPress networks needing a consistent SMTP solution with logging and reliability.

Setup & Workflow

  1. Install and activate the plugin in the WordPress Dashboard.
  2. Launch the setup wizard: enter your “From” email and name, select your mailer provider, and authenticate via API or credentials.
  3. Test the connection by sending a test email.
  4. Optionally configure a fallback mailer for additional reliability.
  5. Use the email log to monitor sent messages, filter by status, and resend if necessary.
  6. Periodically check logs and ensure API credentials remain valid.

Benefits

  • Ensures better email deliverability and fewer messages lost to spam.
  • Full visibility into outgoing emails through logs and retry options.
  • Enhanced reliability with fallback options.
  • Secure authentication and support for modern SMTP standards.
  • Ideal for e-commerce, membership sites, blogs, and any WordPress site relying on transactional emails.

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