Office 365 Pro Extension

Office 365 Pro extension gives you the power to connect PostSMTP with your Outlook and Microsoft 365 accounts to improve email deliverability for your WordPress site. The extension comes equipped with advanced features like email logs, OAuth 2.0 protocol, fallback mailing, and more.

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The Post SMTP plugin makes Microsoft 365 WordPress integration a Breeze!

Whether you need to sell your products, share some big news, or tell a story, Post SMTP makes it super easy to configure and understand the internals of your email delivery.

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.

Slack Integration

Get updated about your email delivery issues and receive all your WordPress email failure alerts directly into your slack channels.

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Monitor your Microsoft 365 email delivery with our New Mobile App

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 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 plugin for many years and so glad it’s now a commercial product with continuous development and improvements! Thanks!

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 PRO or Add-Ons you will be completely support.

K Taylor

Sending Emails Made Easy with Office 365 Extension

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