WPO365 | Mail Integration for Office 365 / Outlook

Ver. 1.9.2 – Changed short description
Ver. 1.9.1 – Fixes an XSS vulnerability reported by patchstack in April 2023.
Ver. 1.9.0 – Ownership of the plugin transferred to WPO365 and tested with WordPress 6.1 / PHP 8.0
Ver. 1.8.6 – Corrected typo of atts filter variable to args
Ver. 1.8.5 – Added code to handle empty to, cc, bc and reply to email addresses, as well as adding an admin error if wp_mail is utilised by another plugins
Ver. 1.8.4 – Added Important Updates! notification to alert users to need to re-authenticate with Office 365
Ver. 1.8.3 – Addressed composer dependency issues by using php-scoper to namespace php libraries. Also addressed empty email array bug.
Ver. 1.8.2 – Modified wp_mail plugable function to address various issues with closing SMTP mail events and forwarding to the Graph API
Ver. 1.7.1 – Fixed undefined variable error for $cc, $bcc and $reply_to in older PHP versions
Ver. 1.7.0 – Fixed WooCommerce and HTML issue
Ver. 1.6.0 – Fixed email content type issue, invalid oauth state issue, and reply-to and send as bug
Ver. 1.5.0 – Fixed additional multisite bug and reply-to bug
Ver. 1.4.0 – Fixed bug where multisite options were unsupported
Ver. 1.3.0 – Changed error and OAuth scope handling.
Ver. 1.2.0 – Added support for sending attachments <3MB in size. Fixed session bug with WordPress API.
Ver. 1.1.0 – Added prefix namespace to composer libraries to avoid conflicts with other plugins using Guzzle whilst also updating the oauth2-azure library at the same time.
Ver. 1.0.4 – Fixed issue with code running outside of settings page, leading to error messages on admin backend. Replaced localhost with 127.0.0.1 if present in redirect URI to prevent potential hostname resolution issues. Updated to handle multiple “to” email addresses (either as a comma separated string, or a one dimensional array)
Ver. 1.0.3 – Fixed issue with send as feature, preventing emails being sent on behalf of others.
Ver. 1.0.2 – Updated readme.txt description and tags.
Ver. 1.0.1 – Fixed minor spelling and display issues.
Early November 2022, ownership of the Mail Integration for Office 365 / Outlook plugin transferred to WPO365. We are committed to provide (best-effort based) support for this plugin until the end of 2023.

To ensure, however, that we are able to provide you with long time support, we urge you to download and install the WPO365 | MICROSOFT GRAPH MAILER plugin for WordPress instead (and de-activate the Mail Integration for Office 365 / Outlook plugin and remove it from your WordPress website).

If you have already installed and configured the Mail Integration for Office 365 / Outlook plugin, then please make sure to check out our easy-to-understand online migration guide.

Marco van Wieren | Downloads by van Wieren | https://www.wpo365.com/

About this plugin

Mail Integration for Office 365/Outlook (using OAuth2 and Microsoft’s Graph API rather than SMTP)

This plugin addresses the limitations of current free SMTP plugins, allowing you to send email from WordPress via your Microsoft Account and ensure your email gets delivered reliably, avoiding the spam box! Note, unlike other free SMTP plugins, this one authenticates with the Microsoft Graph API rather than SMTP using OAuth2. This addresses the recent change by Microsoft to disable basic authentication over SMTP (i.e. username and password), preventing other free SMTP plugins from working with Microsoft Accounts. Unfortunately, Microsoft has yet to enable their Graph API to work with the free versions of Outlook, Live, Hotmail etc. The plugin should however work with the paid for personal and business versions of Office 365, Outlook and Microsoft Exchange.

https://youtu.be/EvNajsDenZMVer. 1.9.2 – Changed short description
Ver. 1.9.1 – Fixes an XSS vulnerability reported by patchstack in April 2023.
Ver. 1.9.0 – Ownership of the plugin transferred to WPO365 and tested with WordPress 6.1 / PHP 8.0
Ver. 1.8.6 – Corrected typo of atts filter variable to args
Ver. 1.8.5 – Added code to handle empty to, cc, bc and reply to email addresses, as well as adding an admin error if wp_mail is utilised by another plugins
Ver. 1.8.4 – Added Important Updates! notification to alert users to need to re-authenticate with Office 365
Ver. 1.8.3 – Addressed composer dependency issues by using php-scoper to namespace php libraries. Also addressed empty email array bug.
Ver. 1.8.2 – Modified wp_mail plugable function to address various issues with closing SMTP mail events and forwarding to the Graph API
Ver. 1.7.1 – Fixed undefined variable error for $cc, $bcc and $reply_to in older PHP versions
Ver. 1.7.0 – Fixed WooCommerce and HTML issue
Ver. 1.6.0 – Fixed email content type issue, invalid oauth state issue, and reply-to and send as bug
Ver. 1.5.0 – Fixed additional multisite bug and reply-to bug
Ver. 1.4.0 – Fixed bug where multisite options were unsupported
Ver. 1.3.0 – Changed error and OAuth scope handling.
Ver. 1.2.0 – Added support for sending attachments <3MB in size. Fixed session bug with WordPress API.
Ver. 1.1.0 – Added prefix namespace to composer libraries to avoid conflicts with other plugins using Guzzle whilst also updating the oauth2-azure library at the same time.
Ver. 1.0.4 – Fixed issue with code running outside of settings page, leading to error messages on admin backend. Replaced localhost with 127.0.0.1 if present in redirect URI to prevent potential hostname resolution issues. Updated to handle multiple “to” email addresses (either as a comma separated string, or a one dimensional array)
Ver. 1.0.3 – Fixed issue with send as feature, preventing emails being sent on behalf of others.
Ver. 1.0.2 – Updated readme.txt description and tags.
Ver. 1.0.1 – Fixed minor spelling and display issues.