Our system generated emails are all starting with "Auth Failed"

Summary

This morning all of the email messages from the system are starting with "Auth Failed" then the subject line of the email message.

Content

Hello Everybody!

This morning all of the email messages from the system are starting with "Auth Failed" then the subject line of the email message.

For example a report email this morning had this in the subject: Auth FailedJB-Enrollment EIP Report_edited is available and a LP notification email had the: Auth FailedYou have been added to the following Learning Plan: 2021-2022 NERC CIP Cyber Security Training

It just started happening today 

I have already entered a ticket with support but I thought I'd see if anyone else was having the same issue.