Exchange
Online Protection
Exchange Online Protection (EOP) is the
cloud-based filtering service that protects your organization against spam,
malware, and other email threats. EOP is included in all Microsoft 365
organizations with Exchange Online mailboxes.
How
EOP works
To understand how EOP works, it helps to
see how it processes incoming email:
·
When
an incoming message enters EOP, it initially passes through connection
filtering, which checks the sender's reputation. Most spam is stopped at this
point and rejected by EOP.
·
Then
the message is inspected for malware. If malware is found in the message or a
message attachment, the message is delivered to quarantine. By default, only
admins can view and interact with malware quarantined messages. But, admins can
create and use quarantine policies to specify what users are allowed
to do to quarantined messages.
·
The
message continues through policy filtering, where it's evaluated against any
mail flow rules (also known as transport rules) that you've created. For
example, a rule can send a notification to a manager when a message arrives
from a specific sender.
·
In
on-premises organization with Exchange Enterprise CAL with Services
licenses, Microsoft Purview Data Loss Prevention (DLP) checks in EOP
also happen at this point.
·
The
message passes through content filtering (anti-spam and anti-spoofing) where
harmful messages are identified as spam, high confidence spam, phishing, high
confidence phishing, or bulk (anti-spam policies) or spoofing (spoof settings
in anti-phishing policies). You can configure the action to take on the message
based on the filtering verdict (quarantine, move to the Junk Email folder,
etc.), and what users can do to the quarantined messages using quarantine
policies.
A message that successfully passes all
of these protection layers is delivered to the recipients.
EOP
Features:
·
EOP
uses several URL block lists that help detect known malicious links within
messages.
·
EOP
uses a vast list of domains that are known to send spam.
·
EOP
uses multiple anti-malware engines help to automatically protect our customers.
·
EOP
inspects the active payload in the message body and all message attachments for
malware.
·
For
recommended values for protection policies.
·
For
quick instructions to configure protection policies.
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