If you have Outlook as part of Microsoft 365, you may want to check your Junk folder. Many users reported their emails were sent directly to the junk folder.

Microsoft said it was caused by an update the company made to the program. Shortly after discovering the error, the company said on social media, “”We’ve reverted the change and observed successful email delivery. We’re now reprocessing any emails that were incorrectly delivered as junk.”

Many users also reported they were not able to forward emails as well.

The company said the issue was a new spam rule designed to protect users from unwanted junk mail. One drawback of spam filters is that these security settings can sometimes incorrectly label legitimate messages as junk or spam.