Guidance on spam processing and junk mail

If you find a message that is not junk you can mark the item as not junk and the message will be moved to your Inbox and the sender will be added to your Safe senders and recipients list.

Outlook on the Web users can find out more about junk email and phishing and the actions they can take to manage their junk email.

Outlook desktop users can manage their junk mail using its junk email filter.

Junk email reporting lets you report junk email to Microsoft for analysis to help improve the effectiveness of the junk email filtering technologies.

This can only be reported using Outlook on the Web. When you mark a message as junk or not junk, you will see a dialog box that asks you if you want to send a copy of the message to Microsoft to improve the accuracy of the junk email filter.

If you still find that some persistent spam or unwanted personal messages continue to arrive in your junk email folder you can either create a rule to delete certain emails immediately or use Blocked Senders.

Outlook clients have an additional junk mail filter that can be used in addition to the central Exchange Online Protection service (EOP).

By default, the junk email filter protection level on the Outlook application is set to No Automatic Filtering. However, you can make the filter more aggressive so that it catches more junk messages.

The higher you set the protection level, the greater the risk that some legitimate messages will be incorrectly filtered as junk.

There are a few scenarios where internal Oxford email originates outside of Nexus365.

•    Units that run their own mail service
•    Third party mail distribution tools and systems
•    Individual users with clients configured to send via an unauthenticated SMTP service

Email sent from any of the above scenarios will be scanned by Exchange Online Protection (EOP) along with all the other email coming into Nexus365.

The contents of Outlook's junk email folder are deleted automatically after 90 days.

In some cases, an incoming email may be perceived as a greater threat by Exchange Online Protection (EOP) and be sent to your Nexus365 email quarantine rather than your junk email folder. 

You can check you Nexus365 email quarantine by going directly to https://security.microsoft.com/quarantine.

For further information on the email quarantine, please check Nexus365 email quarantine.