We're seeing blocked emails by our clients, both inbound and outbound. I've sent three examples to CLOUDfeedback@feedback-87.brightmail.com.
Just wanted to post in here to increase visibility on this issue.
Example 1:
From: Mail Delivery Subsystem <mailer-daemon@googlemail.com>
Date: Tue, Oct 11, 2016 at 10:13 AM
Subject: Delivery Status Notification (Failure)
To: XXXXXXXX@boxed.com
Delivery to the following recipient failed permanently:
XXXXXXXXXXXX@diageo.com
Technical details of permanent failure:
Google tried to deliver your message, but it was rejected by the server for the recipient domain diageo.com by cluster3.eu.messagelabs.com. [85.158.136.3].
The error that the other server returned was:
553-Message filtered. Refer to the Troubleshooting page at
553-http://www.symanteccloud.com/troubleshooting for more
553 information. (#5.7.1)
Example 2:
From: Mail Delivery Subsystem <mailer-daemon@googlemail.com>
Date: Wed, Oct 12, 2016 at 10:08 AM
Subject: Delivery Status Notification (Failure)
To: XXXXXXX@boxed.com
Delivery to the following recipient failed permanently:
XXXXXXXXXX@jpmorgan.com
Technical details of permanent failure:
Google tried to deliver your message, but it was rejected by the server for the recipient domain jpmorgan.com by cluster14.us.messagelabs.com.[216.82.248.67].
The error that the other server returned was:
553-Message filtered. Refer to the Troubleshooting page at
553-http://www.symanteccloud.com/troubleshooting for more
553 information. (#5.7.1)
Example 3:
Not sure of time, but was sent Wednesday October 12.
rb.com -> boxed.com
The following organization rejected your message: server-12.tower-38.messagelabs.com.