Hosted Exchange - “550 5.7.60 smtp, client does not have permissions to send as this sender”

Incident Report for Zix | AppRiver

Update

We are continuing to work on a fix for this issue.

Posted Feb 20, 2025 - 16:20 CST

Identified

The issue has been identified and a fix is being implemented.

Posted Feb 20, 2025 - 10:49 CST

Update

Our Engineering team is continuing to investigate this issue

Posted Feb 19, 2025 - 15:35 CST

Investigating

We are aware of an issue with IMAP and POP clients receiving “550 5.7.60 smtp, client does not have permissions to send as this sender” error when sending from outlook.

We are investigating this for resolution.

As a work around users can use OWA - http://exg7.exghost.com to send and receive emails

Posted Feb 19, 2025 - 09:56 CST

This incident affects: Secure Hosted Exchange (Exchange 2013/2016+ (EXG7)).