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Emails from Salesforce are rejected when Direct Send is enabled/disabled in Office365

Julkaisupäivä: Mar 5, 2026
Kuvaus

When an email is sent from Salesforce, where both the sender and recipient share the same email domain and their mailboxes are hosted in Outlook (Exchange Online) with Direct Send disabled, the message is rejected. 

The user who triggered the email receives a bounce-back notification (or) flagged as a Permanent failure in Salesforce email logs with the following error :

< 550 5.7.68 TenantInboundAttribution; Direct Send not allowed for this organization from unauthorized sources  >

Ratkaisu
  • This is not a Salesforce issue. User's Exchange is rejecting the emails due to the Direct Send feature, which is flagging Salesforce as an Un-authorized source

  • Direct Send is a Microsoft Office 365 feature that controls how email is routed.

  • Contact your Internal IT and Microsoft Support team in order to review and change the settings in Office 365.
  • Related Article from Microsoft : Direct Send

 

Knowledge-artikkelin numero

005133045

 
Ladataan
Salesforce Help | Article