Worry-Free Business
Security can send
notifications in the form of email messages to various alerts.
You can configure notifications to apply only to internal email
messages by using Custom Internal Email Definitions. This is useful
if your company has two or more domains and you would like to treat
email messages from both domains as internal email messages. For
example, example.com and example.net.
The recipients on your Internal Email Definitions list will receive
messages for notifications when you select the Do not
notify external recipients check box under the Notification
settings for Antivirus, Content
Filtering, and Attachment Blocking.
Do not confuse the Internal Email Definitions list with the Approved
Senders list.
To prevent all email from addresses with external domains from
being labeled as spam, add the external email addresses to the Approved
Senders lists for Anti-Spam.
About Custom Internal Email Definitions
The
Messaging Security Agent divides email traffic into two network
categories: internal and external. The agent queries the Microsoft
Exchange server to learn how the internal and external addresses
are defined. All internal addresses share a common domain and all
external addresses do not belong to that domain.
For example,
if the internal domain address is “@trend_1.com”, then the Messaging
Security Agent classifies addresses such as “abc@trend_1.com” and “xyz@trend_1.com”
as internal addresses. The agent classifies all other addresses,
such as “abc@trend_2.com” and “jondoe@123.com” as external.
You
can only define one domain as the internal address for the Messaging
Security Agent. If you use Microsoft Exchange System Manager to
change your primary address on a server, Messaging Security Agent
does not recognize the new address as an internal address because
Messaging Security Agent cannot detect that the recipient policy
has changed.
For example, you have two domain addresses for
your company: @example_1.com and @example2.com. You set @example_1.com
as the primary address. Messaging Security Agent considers email
messages with the primary address to be internal (that is, abc@example_1.com,
or xyz@example_1.com are internal). Later, you use Microsoft Exchange
System Manager to change the primary address to @example_2.com.
This means that Microsoft Exchange now recognizes addresses such
as abc@example_2.com and xyz@example_2.com to be internal addresses.