WPO365 Mail Integration for Office 365 Outlook is a plugin designed for WordPress users needing reliable email delivery through Microsoft's services. Utilizing OAuth2 and Microsoft's Graph API, it addresses the shortcomings of traditional SMTP plugins by ensuring secure and efficient email sending without being prone to spam issues. This plugin is particularly useful for users with paid Microsoft accounts, as it does not support free versions of Outlook or Hotmail.

The plugin requires WordPress versionor higher and PHP versionto function properly. However, users are advised to transition to the WPO365 Microsoft Graph Mailer plugin due to the discontinuation of support for this version. A comprehensive online migration guide is available for those who have already installed and configured the plugin, ensuring a smooth transition.