The #1 WordPress SMTP plugin to Improve WordPress Email Deliverability

Post SMTP is the most powerful and easy-to-use SMTP plugin for WordPress to enhance WordPress email deliverability. Supports all popular SMTP service providers, with features like email logs, failure notifications, a dedicated mobile app, and much more.

Email Failure Alerts

Connect with any SMTP Mailer

Email Logs & Reports

Easy Setup Wizard

Dedicated Mobile App

Auto Resend Failed Emails

Chrome & Slack Support

Trusted by 400K + website owners

4.7/5 stars on wordpress.org

14-day money back guarantee

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Key Post SMTP Features to Improve WordPress Email Deliverability

Post SMTP ensures your WordPress emails reach the recipient’s inbox every time! Find out what makes Post SMTP the most advanced and easy-to-use SMTP plugin for WordPress.

Detailed Email Logs

Keep track of every email sent from your WordPress site with precise information like status, subject, recipient, and error message.

Secure SMTP Authentication

Authenticate your SMTP mailer account securely via OAuth 2.0 protocol without storing your login credentials in WordPress.

Back-Up SMTP Mailer

Never miss an email delivery by setting up a secondary SMTP mailer to send your WordPress emails when the primary one fails.

Email Failure Alerts

Get notified instantly when an email fails to deliver. You can choose how you want to receive alerts via email, SMS, or Slack.

Post SMTP Mobile App NEW

A dedicated Mobile App to monitor email logs, connect multiple sites, identify errors, and resend any failed email with a single tap.

Chrome Extension Alerts

Stay on top of your email delivery issues by receiving real-time notifications of any email delivery failures directly in your browser.

Auto-Retry Failed Emails

If the SMTP connection fails to send an email, Post SMTP automatically resends any failed emails to ensure optimal email deliverability.

Email Health Report

Receive a daily, weekly, or monthly email health report featuring an overview of your email sending, viewing, and failing statistics.

Resend Email Attachments

Save time and bandwidth by easily viewing and resending any email with attachments directly from the log screen.

Struggling with WordPress Not Sending Emails Issues?

Join 400,000+ website owners who already use Post SMTP to fix their WordPress email deliverability issues.
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OAuth 2.0

Set up SMTP for WordPress with OAuth 2.0 protocol without storing your email password in the WordPress database.

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WordPress Email Logging

You can easily read, filter, and check the status of WordPress email logs and error messages.

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Instant Notification

For any reason, if one of your WordPress emails is not sent, Post SMTP will let you know by Email, Pushover, or Slack

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Chrome Extension

The only WordPress SMTP mailer plugin you can get notified about issues inside your chrome.

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Fallback Mailing

Besides the notifications, with simple WordPress email settings, you can define a backup WordPress SMTP to send an email when the main one fails.

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Unparalleled Customer Support

The only free WordPress SMTP plugin with multiple support options, including WordPress forum, Post SMTP forum, email, and Slack

Go Pro with Post SMTP WordPress Plugin

Visit our Post SMTP add-ons and extension store
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Introducing Mobile App for Post SMTP

PostSMTP Mobile App is the only app for WordPress email delivery monitoring which helps you notify regarding email failures, show error details, preview content of emails, resend failed emails, track multiple WP sites and more. The Post SMTP Mobile App works seamlessly with the Post SMTP plugin.

Why WordPress Community testimonials POST SMTP

Where was this Plugin Yesterday??

What a plugin. The diagnostics and Connectivity Tests gave me the answers I was looking for for so long.. FINALLY got email to work on my site.. Nothing I have about my site seems to be ‘in the box’, and same with Email delivery.. Well, Post SMTP Mailer understood my sites needs over any other similar plugin, so I am happy to tick the BIG LOVE ‘box’ for the plugin

Rick M New Zealand

Very Easy to setup

I’ve been using I tried and tried to manually setup SMTP authentication with my Office365/Exchange server. I thought I dotted every “i” and crossed every “t” but I obviously missed something. Using the Office365 Addon was so much faster and easier…saved me a lot of precious time fiddling with settings and researching a solution. I’ve been using the Post SMTP…


MHCA Admin

Great Plugin, BEST Support

I use this plugin as part of a bundle for all of my new website builds because it works so well. For the first time, I purchased the Add-On for Office 365. I ran into a couple of issues with setup and support worked quickly and efficiently (even did a zoom call) to resolve the problems. HIGHLY recommend and you can feel comfortable that if you purchase…


K Taylor


Have a question regarding Post SMTP? Check out our frequently asked questions below. If you can’t find your question here, feel free to contact us directly.

Trusted by 400K+

website owners

Rated 4.7/5

by customers

14-day money-

back guarantee

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.
Post SMTP is ideal for anyone who wants to improve the deliverability and reliability of their WordPress emails. Whether you are a blogger, a business owner, a developer, or an agency, Post SMTP can help you send emails with confidence and ease.
Absolutely not! You do not need any coding knowledge to use Post SMTP. The plugin has a unique user-friendly interface called “Start the Wizard” that guides you through the setup process and helps you configure the best settings for your email service provider.
To use the Post SMTP Plugin, you need a WordPress site and an account with an SMTP service provider such as Brevo (formerly Sendinblue), Amazon SES, Microsoft 365, SendGrid, Mandrill, Postmark, SparkPost, Mailgun, etc.
No, Post SMTP will not make your website load slower. The plugin uses a background process to send emails asynchronously, which means it does not affect the performance of your website or the user experience of your visitors.
Post SMTP (aka WordPress mail plugin) supports some of the most popular email service providers, including Gmail, Gmail API, Brevo (formerly Sendinblue), SendGrid, Mailgun, Mandrill, SparkPost, Postmark, Elastic Email (Coming Soon), and some additional email service providers for pro extension users such as Zoho Mail, Office365, and Amazon SES.
Yes, Post SMTP is compatible with WordPress Multisite. You can either network activate the plugin and use the same settings for all sites in your network or activate it individually on each site and configure it separately.
No, Post SMTP will not work on websites that don’t use WordPress because it is a WordPress-specific plugin that only works with WordPress sites.
Yes, Post SMTP is your go-to WordPress mail SMTP plugin with the “Other SMTP” server option. If you want to send emails using an SMTP server instead of an email service provider, all you need to do is configure the SMTP server connection details and send emails via the SMTP server instead of an email provider.

Looking for a reliable WordPress SMTP plugin?
Post SMTP is the answer!

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