Some or most of email messages are not being delivered properly when using Symantec Brightmail Gateway 8.x or later.
- Under the queue status page you see the message:
"450 4.4.1 [internal] Connection Timed Out"
This message indicates that the connection is either timing out or being interrupted while the message is being transferred to its destination which can be a local message or a non-local message.
If you have a firewall between the Symantec Brightmail Gateway appliance and the destination SMTP server which can be a local or non-local mailbox server, make sure SMTP/ESMTP features are disabled.
Please consult with the firewall vendor for information on how to disable these features.
Firewalls that are known to have such features are:
For other issues that might be caused by these features, please check the following link http://www.symantec.com/docs/TECH85536
Symantec Brightmail Gateway 8.x or later
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