21.0.6 Emails not sending | 554 Transaction failed: Domain contains illegal character (in reply to end of DATA command))

Products

• CA Automic One Automation
• CA Automic Workload Automation - Automation Engine

Issue/Introduction

Post upgrade to version 21.0.6 - Emails are not being sent - Below error can be seen in the mail logs

554 Transaction failed: Domain contains an illegal character (in reply to end of DATA command))

Environment

Release: 21.0.6

Component: Automation Engine

Functional Area: Notification (Mail)

Cause

Defect.

Resolution

Update to a fixed version listed below or a newer version if available.

Fix version:
Component(s): Automation Engine 21.0.7 HF1 - Available

Component(s): Automation Engine 21.0.8 - Available

Additional Information

Bug ID: AE-32764

Bug Title: 554 Transaction failed: Domain contains illegal character (in reply to end of DATA com