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Your mails and attachments are the safest in Exchange Online

Microsoft Exchange Online Protection (EOP) is a cloud-based email filtering service that helps protect an organization against spam and malware, and includes features to safeguard the organization from messaging-policy violations. EOP can simplify the management of the company’s messaging environment and alleviate many of the burdens that come with maintaining on-premises hardware and software.

The following are the primary ways organizations can use EOP for messaging protection:

  • In a standalone scenario.   EOP provides cloud-based email protection for the organization’s on-premises Exchange Server 2013 environment, legacy Exchange Server versions, or for any other on-premises SMTP email solution.

  • As a part of Microsoft Exchange Online.   By default, EOP protects Exchange Online cloud-hosted mailboxes.

  • In a hybrid deployment.   EOP can be configured to protect the messaging environment and control mail routing when the company have a mix of on-premises and cloud mailboxes.


Anti-malware protection

  • Using multiple anti-malware engines, EOP offers multilayered protection that’s designed to catch all known malware

  • 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.

  • Office 365 Admins Customize anti-malware policies in the EAC. They can configure the default policy for company-wide settings.

  • Admins can create custom content filter policies and apply them to specified users, groups, or domains in the organization

Anti-spam protection

  • Uses proprietary anti-spam technology to help achieve high accuracy rates.

  • Provides strong connection filtering and content filtering on all inbound messages.

  • Outbound spam filtering is also always enabled if the service is used for sending outbound email.

  • Spam filtering cannot be completely disabled, but certain company-wide settings can be modified by editing the default anti-spam policies

  • Admins can create custom content filter policies and apply them to specified users, groups, or domains in the organization.


  • 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, Admins 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.

  • Spam quarantine for end users lets them manage their own spam-quarantined messages.

Junk Email Reporting

  • From Office Outlook or Outlook Web Access, EOP lets users easily report junk (spam) email to Microsoft for analysis to help reduce the number and impact of future junk email messages filtered by the service.