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Web357 Mail Connect for Microsoft Outlook 365
Web357 Mail Connect for Microsoft Outlook 365

Web357 Mail Connect for Microsoft Outlook 365

0/5 (0 ratings) 30 active installs Updated Nov 6, 2026
emailMicrosoft 365microsoft graphoffice 365outlook
Download v1.0.3 Plugin Website
Configuration tab: connect your Microsoft 365 / Outlook account with one click using OAuth 2.0.

Configuration tab: connect your Microsoft 365 / Outlook account with one click using OAuth 2.0.

The Web357’s Mail Connect for Microsoft Outlook 365 lets you send all your WordPress emails (WooCommerce notifications, Contact Form 7 / WPForms / Fluent Forms / Gravity Forms submissions, password resets, and any wp_mail() call) through Microsoft 365, Outlook, or Exchange Online, using the secure Microsoft Graph API and modern OAuth 2.0 authentication. No SMTP passwords, no fragile basic auth. Just connect your Microsoft account once and your transactional emails will be sent reliably from your real mailbox, dramatically improving deliverability and helping you stay compliant with Microsoft’s modern authentication requirements (after the deprecation of basic auth / SMTP AUTH). If you want a simple, secure way to fix WordPress email delivery using your Microsoft 365 / Outlook mailbox, Web357 Mail Connect for Microsoft Outlook 365 is for you.

Full setup, Azure app registration, and troubleshooting steps are in the official documentation.

How it works

  1. Open Settings > MS 365 Mail Connect and paste the Application ID and Client Secret of your Azure app registration.
  2. Click Save Settings, then Sign in with Microsoft, and accept the requested permissions.
  3. The page shows a Connected status. Send a test email with Send Test Email. From then on, every email WordPress sends goes out through your Microsoft 365 mailbox.

Registering the app in the Azure Portal is covered step by step in the configuration guide.

External services

This plugin connects to Microsoft’s identity and mail services so it can send WordPress emails through your Microsoft 365 / Outlook / Exchange Online mailbox using OAuth 2.0 and the Microsoft Graph API. It requires an Azure / Microsoft Entra ID app registration that you create and control.

Microsoft identity platform (login.microsoftonline.com) is used to authorize the plugin against your Microsoft account and to exchange/refresh the resulting access token. When you click “Connect” in the Configuration tab, and again automatically whenever a stored access token expires, the plugin sends your app’s Client ID, Client Secret, Tenant ID, redirect URI, and the OAuth authorization code or refresh token, and receives back an access token and refresh token in return.
Terms of use: https://www.microsoft.com/en-us/servicesagreement/. Privacy statement: https://privacy.microsoft.com/en-us/privacystatement

Microsoft Graph API (graph.microsoft.com) is used to (1) read the connected account’s email address right after you authorize, and (2) send every outgoing email (the message subject, HTML/text body, recipient addresses, headers, and attachments) using your connected mailbox’s identity. This happens every time WordPress (or any plugin using wp_mail()) sends an email, and when you use the built-in Test Email tool.
Terms of use: https://learn.microsoft.com/en-us/legal/microsoft-apis/terms-of-use. Privacy statement: https://privacy.microsoft.com/en-us/privacystatement

No data is sent to Microsoft until you complete the OAuth connection yourself.

Free features

  • OAuth 2.0 authentication via Microsoft Graph: connect your Microsoft 365 / Outlook / Exchange Online account in one click, no app passwords required.
  • Reroute every wp_mail() call through the Microsoft Graph API for reliable delivery and improved inbox placement.
  • Compatible with Microsoft’s modern authentication: works after the deprecation of basic auth / SMTP AUTH for Exchange Online.
  • Multi-tenant support: connect a Private-only tenant via Tenant ID, or leave it blank for Multi-tenant apps.
  • Test Email tool: send a real test email from the WordPress admin to verify your setup before going live.
  • One-click revoke: disconnect and delete the stored access key whenever you want.
  • Compatible with WooCommerce, Contact Form 7, WPForms, Fluent Forms, Gravity Forms, MemberPress, LearnDash, and any plugin that uses wp_mail().
  • Translation-ready and works on any modern WordPress theme.

PRO Features

Upgrade to the PRO version for a mail log, shared mailboxes and more control over what leaves your site. Plans cover 1, 3, 5 or unlimited sites and include 1 year of updates and support, with a 30-day money-back guarantee.

  • Mail Log: view every sent, failed, and staged email with full headers, content preview, status, and timestamps. See the Mail Log documentation.
  • Mail Staging Mode: log emails to the database instead of sending them, perfect for staging and development environments.
  • Mail Throttle: limit how many emails per minute leave your site to avoid hitting Microsoft Graph rate limits.
  • Send BCC: automatically send a blind copy of every outgoing email to an internal address (great for record-keeping and compliance).
  • Default Reply-To: set a global reply-to address for all outgoing emails when one isn’t already specified by the form or plugin.
  • Send from a shared mailbox: override the From address with a shared mailbox or a mailbox you have “Send As” permission on, plus an allow-list of additional From addresses. See the Send As guide.
  • 1 year of updates and support from the Web357 team.

Staging, throttle, BCC, Reply-To, and allowed From addresses are covered in the Advanced Configuration documentation.

Documentation