Install Post SMTP (WordPress SMTP Plugin) to fix WordPress email delivery. Connect Gmail SMTP, Microsoft 365, Brevo, SendGrid, Zoho, Amazon SES, etc.
| Last updated | September 24, 2026Updated in the last 3 months |
|---|---|
| Tested up to | WordPress 7.1.4Covers WordPress 7.1.4, the current release |
| Needs WordPress | 5.6.0 or newer |
| Needs PHP | 7.1 or newer |
| First published | October 15, 2017 |
| Support, last two months | 9 of 16 threads resolved (56%) |
4.7 / 5 from 528 reviews
| 5 stars | 478 |
|---|---|
| 4 stars | 6 |
| 3 stars | 6 |
| 2 stars | 3 |
| 1 star | 35 |
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WordPress SMTP Plugin
Are you dealing with the WordPress not sending emails problem? Post SMTP helps you fix WordPress email delivery by connecting your site to a reliable SMTP or API mailer.
Post SMTP is a free WordPress SMTP plugin that helps you send WordPress emails securely and reliably through Gmail, Microsoft 365, Outlook, Amazon SES, Brevo, Mailgun, SendGrid, Postmark, Zoho Mail, and other supported email service providers.
Beyond SMTP, Post SMTP gives you the tools to monitor WordPress email delivery. Track sent and failed emails with email logs, inspect delivery errors, and get failure alerts when something goes wrong. You can also configure backup SMTP connections to keep your site’s emails moving if your primary mailer becomes unavailable.
With 20+ SMTP and API mailer options, Post SMTP works with the email service you already use. Its monitoring and notification tools help you troubleshoot delivery problems faster and keep important WordPress emails on track.
What is SMTP, and Why Do You Need It?
SMTP, short for Simple Mail Transfer Protocol, is the most widely used protocol for online email transmission. SMTP configuration with proper authentication for your WordPress site ensures that your WordPress emails do not end up in spam.
The opening of the plugin's own description. The full text, installation notes and changelog are on its WordPress.org page.
WordPress uses the PHP mail() function by default, which may not provide reliable email delivery. Post SMTP routes your WordPress emails through a trusted SMTP or API mailer such as Gmail, Microsoft 365, Amazon SES, Brevo, SendGrid, Mailgun, Postmark, etc. This can help fix failed or missing WordPress emails and improve email delivery.
Post SMTP connects your WordPress site to a dedicated SMTP or API mailer instead of relying on your web server’s default email function. It also provides email logs, delivery error details, backup connections, failure alerts, and even a dedicated mobile app to help you monitor and troubleshoot WordPress email delivery.
Yes. Post SMTP supports Gmail and Google Workspace. You can connect your account using Google’s supported authentication method, such as OAuth 2.0, and send WordPress emails through your Gmail or Google Workspace account. Post SMTP also offers Gmail One-Click Setup.
Yes. Post SMTP supports Microsoft 365 and Outlook. You can connect your account using Microsoft’s supported authentication method, such as an Application (Client) ID and Client Secret, or use Post SMTP’s Microsoft One-Click Setup to connect your account and send WordPress emails through Microsoft 365.
Yes. Post SMTP works with WooCommerce and can deliver transactional emails generated by your store, including order notifications, customer emails, password resets, and other WordPress emails.
Yes. Post SMTP works with Contact Form 7 and other WordPress form plugins. Once you configure a supported SMTP or API mailer, Contact Form 7 emails can use that connection instead of your site’s default email function.
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Read from the WordPress.org plugin API on , when WordPress 7.1.4 was the current release. WordPress.org rounds active installs into buckets. These are the directory's figures, not my verdict, and I haven't tested this plugin.