MIME Message Is Missing 'From' Header Error With Passwordless Email Login

Overview

This article explains an error that prevents users from receiving emails when attempting to log in with the Passwordless Email feature. The system logs display the following error message:

Error sending email: Message failed: 550 MIME message is missing ‘From’ header

Applies To

  • Passwordless Email

Cause

This error occurs because the From field in the Passwordless Email template is not populated with an email address.

Solution

  1. Navigate to Authentication > Passwordless > Email.
  2. Enter an appropriate email address in the From field.