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Performance Issue: Office 365 some forwarded mail blocked

Last Updated:
2017-12-06 12:58:57
Event:
2017-12-06 12:53:00
Status:
Open
Brief Description:
Some faculty and staff who have chosen to forward their Cornell email to another destination (for example, Gmail) and who receive a large quantity of spam, have had their forwarding and ability to send mail from Office 365 blocked.
User Impact:
N/A
Workaround:
If this is happening to you:
1. Remove your forwarding settings.
2. Make sure your Office 365 account keeps a copy of your email. This is the default, so unless you changed it, you should be fine.
3. Contact the IT Service Desk at itservicedesk@cornell.edu so CIT can request that Microsoft remove the block.
Current Status:
Cornell Information Technologies staff are investigating options to eliminate this problem, and updates will be provided as soon as a solution is identified.
Services Affected:
Email and Calendar
Subsites Affected:
Faculty/Staff Email (Office 365)
Full Description:
Some faculty and staff who have chosen to forward their Cornell email to another destination (for example, Gmail) and who receive a large quantity of spam, have had their forwarding and ability to send mail from Office 365 blocked.

If this is happening to you:
1. Remove your forwarding settings.
2. Make sure your Office 365 account keeps a copy of your email. This is the default, so unless you changed it, you should be fine.
3. Contact the IT Service Desk at itservicedesk@cornell.edu so CIT can request that Microsoft remove the block.

This problem occurs because the forwarded spam is seen as a threat to the destination where the person is choosing to forward their Cornell email. That can trigger the destination to stop trusting the sources of that email, in this case Microsoft and Cornell. When this happens, the destination may start refusing ALL email from anyone at Cornell.

To head off this possibility, if Microsoft sees too much spam being sent from a Cornell Office 365 account, including spam that's being forwarded, it shuts down that email account's ability to forward and to send.

Why does spam get included when you forward your mail? Office 365 forwarding delivers *all* email to the destination, including junk mail, so people who forward have the same option of reviewing or managing likely spam at the forwarding destination as they have in Office 365. If all mail weren't forwarded, they wouldn't be able to do this.




Timeline of Changes

Description Current Status Date Time
Some faculty and staff who have chosen to forward their Cornell email to another destination (for example, Gmail) and who receive a large quantity of spam, have had their forwarding and ability to send mail from Office 365 blocked. If this is happening to you: 1. Remove your forwarding settings. 2. Make sure your Office 365 account keeps a copy of your email. This is the default, so unless you changed it, you should be fine. 3. Contact the IT Service Desk at itservicedesk@cornell.edu so CIT can request that Microsoft remove the block. This problem occurs because the forwarded spam is seen as a threat to the destination where the person is choosing to forward their Cornell email. That can trigger the destination to stop trusting the sources of that email, in this case Microsoft and Cornell. When this happens, the destination may start refusing ALL email from anyone at Cornell. To head off this possibility, if Microsoft sees too much spam being sent from a Cornell Office 365 account, including spam that's being forwarded, it shuts down that email account's ability to forward and to send. Why does spam get included when you forward your mail? Office 365 forwarding delivers *all* email to the destination, including junk mail, so people who forward have the same option of reviewing or managing likely spam at the forwarding destination as they have in Office 365. If all mail weren't forwarded, they wouldn't be able to do this. Cornell Information Technologies staff are investigating options to eliminate this problem, and updates will be provided as soon as a solution is identified. 2017-12-06 12:57:38