Delivery Status Notification (Failure) mailbox not full in CCM 8.6.

[sprintership-il]

From time to time we receive delivery notification even thought mailbox is not full. 

From: <postmaster@>
Date: Wed, Sep 2, 2015 at 1:52 PM
Subject: Delivery Status Notification (Failure)
To:


Message could not be delivered to the following recipient(s):




Final-Recipient: rfc822;
Action: failed
Status: 4.0.2


 

[Terry Cheema]

Was there any changes made to exchange any patches etc.?

The message means CUC is having connectivity issues with SMTP. Are the exchange and CUC in the same location - if not any chance of network issues between the locations?

Ref: http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/connection/8x/troubleshooting/guide/8xcuctsgx/8xcuctsg170.html

•4.0.2—An unknown error (for example, connectivity problems) prevented Connection from communicating with another SMTP server.

-Terry

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[sprintership-il]

Thank You for the reply. No no changes were made to anything. The SMTP that is used, is based on the GMAIL APPS. 

-Thanks again for your response.