Export (0) Print
Expand All

Anti-Spam and Anti-Malware Protection

Office 365
 

Applies to: Office 365

Topic Last Modified: 2014-05-21

Microsoft Exchange Online provides built-in malware and spam filtering capabilities that help protect inbound and outbound messages from malicious software and help protect your network from spam transferred through email. Administrators do not need to set up or maintain the filtering technologies, which are enabled by default. However, administrators can make company-specific filtering customizations in the Exchange admin center (EAC).

Using multiple anti-malware engines, Exchange Online offers multilayered protection that’s designed to catch all known malware. All messages transported through the service are scanned for malware (viruses and spyware). If malware is detected, the message is deleted. Notifications may also be sent to senders or administrators when an infected message is deleted and not delivered. You can also choose to replace infected attachments with either default or custom messages that notify the recipients of the malware detection.

For more information about anti-malware protection, see Anti-Malware Protection.

Exchange Online uses proprietary anti-spam technology to help achieve high accuracy rates. The service provides strong connection filtering and content filtering on all inbound messages. Outbound spam filtering is also always enabled if you use the service for sending outbound email, thereby helping to protect organizations using the service and their intended recipients.

For more information about anti-spam protection, see Anti-Spam Protection.

Messages identified as spam and messages that match a transport rule can be sent to the administrator quarantine. Administrators can search for and view details about quarantined email messages in the EAC. After locating the email message, you can release it to specific users and optionally report it as a false positive (not junk) message to the Microsoft Spam Analysis Team if it was misidentified as spam.

There is also a spam quarantine for end users, which lets them manage their own spam-quarantined messages. End user management of spam-quarantined messages can also be performed via end-user spam notification messages (if they are enabled by an administrator).

For more information about the quarantine feature, see Quarantine.

 

Feature

Exchange Server 2013

Office 365 Small Business

Office 365 Small Business Premium

Office 365 Midsize Business

Office 365 Enterprise E1

Office 365 Education A2

Office 365 Government G1

Office 365 Enterprise E3

Office 365 Education A3

Office 365 Government G3

Office 365 Enterprise E4

Office 365 Education A4

Office 365 Government G4

Office 365 Enterprise K1

Office 365 Government K1

Built-In Anti-Spam Protection

Yes 2

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Customize Anti-Spam Policies

Yes but only through Windows PowerShell

Yes

Yes

Yes 3

Yes

Yes

Yes

Yes 3

Built-In Anti-Malware Protection

Yes 1

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Customize Anti-Malware Policies

Yes

Yes 3

Yes 3

Yes 3

Yes

Yes

Yes

Yes 3

Quarantine - administrator management

Yes

Yes 3

Yes 3

Yes 3

Yes

Yes

Yes

Yes 3

Quarantine – end-user self-management

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

NoteNote:
1 Exchange Server 2013 uses only the Microsoft anti-malware engine. Exchange Online uses multiple anti-malware engines to scan inbound, outbound, and internal messages for malware.
2 Microsoft Exchange Server 2013 has most of the same built-in anti-spam capabilities as Exchange Server 2010. For information about the benefits of Exchange hosted spam filtering over the on-premises offerings, see Benefits of Anti-Spam Features in Exchange Online Protection Over Exchange Server 2013.
3 Only accessible via direct access to the Exchange admin center (EAC) management interface.

 

Feature

Exchange Server 2013

Exchange Online Plan 1

Exchange Online Plan 2

Exchange Online Kiosk

Built-In Anti-Spam Protection

Yes 1

Yes

Yes

Yes

Customize Anti-Spam Policies

Yes, but only via PowerShell

Yes

Yes

Yes 3

Built-In Anti-Malware Protection

Yes 2

Yes

Yes

Yes

Customize Anti-Malware Policies

Yes

Yes

Yes

Yes 3

Quarantine - administrator management

Yes

Yes

Yes

Yes 3

Quarantine – end-user self-management

No

Yes

Yes

Yes

NoteNote:
1   Microsoft Exchange Server 2013 has most of the same built-in anti-spam capabilities as Exchange Server 2010. For information about the benefits of Exchange hosted spam filtering over the on-premises offerings, see Benefits of Anti-Spam Features in Exchange Online Protection Over Exchange Server 2013.
2   Exchange Server 2013 uses only the Microsoft anti-malware engine. Exchange Online uses multiple anti-malware engines to scan inbound, outbound, and internal messages for malware.
3   Only accessible via direct access to the Exchange admin center (EAC) management interface.

If you have comments or questions about this topic, we'd love to hear from you. Just send your feedback to Office 365 Service Description Feedback. Your comments will help us provide the most accurate and concise content.

 
Was this page helpful?
(1500 characters remaining)
Thank you for your feedback
Show:
© 2014 Microsoft