
Managing Spam and Junk E-mail in Office 365
Refer to the information below for information about spam and junk mail filtering in Office 365.
How to Report Spam
Please use the steps below to report spam to ACNS so that it can sent to Microsoft for future inclusion in spam filtering definitions:
Messages automatically routed to Junk were successfully processed and need not be reported.
- Click "New Email" in Outlook to compose a new message. Address the e-mail to abuse@colostate.edu and enter a subject (ex: "Report as Spam")
- Find the suspect e-mail message(s) in your mailbox to be added as an attachment in Outlook.
- Drag and drop the spam e-mail from your Inbox into the new e-mail (from step 1) so that it is included as an attachment.
- Send the e-mail.
How Office 365 handles SPAM:
"High confidence spam," which is spam that is marked as very high probability as spam, is automatically quarantined and not delivered to user mailboxes. All other e-mail noted as possible spam is delivered to a user's Junk Email folder in Office 365. Users will no longer receive End User Digest e-mails alerting them of e-mail marked as possible spam and should check the Junk Email folder for e-mails they were expecting to receive but did not.
User's can use the options below to add safe senders and manage junk e-mail settings in Office 365. A user's safe sender list takes precedence over e-mail that would otherwise be marked as High Confidence Spam.
- Manage Safe, Trusted and Blocked email settings
Note: Safe Sender lists are limited to 1000 entries and must be specified as full e-mail addresses because adding Safe Sending domains is not supported. Blocked Sender lists are limited to 500 entries, which can be full email addresses and/or email domains. - Blocked and Allowed maximum entries are approximate and have a cumulative maximum. Keeping these lists as short as possible are ideal.
- Update Junk Mail Level of Protection
Blocked Attachments In Office 365
Exchange Online Protection is configured to block attachments with executable content as well as certain file types, including the following:
- b64
- bat
- bhx
- cmd
- cpl
- dll
- exe
- hqx
- mim
- pif
- ps1
- scr
- shs
- uu
- vbe
- vbs
- wsh
- xxe