OTRS Academy » Documentation » OTRS Administration Manual » Tutorials » Send Email through Outlook 365

Send Email through Outlook 365

October 13, 2025

Since OTRS 2025.7 release, OAuth authentication support is available for Microsoft services.

There will be an important upcoming change regarding email sending through Outlook 365.

See also

Microsoft has announced the planned shutdown of basic authentication for client submission (SMTP AUTH). Originally scheduled for September 2025, this change has now been postponed to March 1, 2026. Further details can be found in Microsoft’s announcement.

To ensure uninterrupted email sending, we recommend planning your transition well in advance of Microsoft’s cutoff date to avoid any disruption.

To configure the email sending:

  1. Go to the Credentials screen.

  2. Create a credential of type OAuth2::MicrosoftGraphApp.

  3. Go to the System Configuration screen.

  4. Search for the setting SendmailModule and set it to Kernel::System::Email::Outlook365.

  5. Search for the setting SendmailModule::Credential and add the name of the credential created in step #2.

  6. Change Queues mail address to the address used in Microsoft Azure.

FacebookXEmailLinkedIn
Scroll to Top