Junk Mail Filter in Primary Mail Service
In Primary Mail Service, email messages judged as junk messages are sorted to the [Junk Email] folder on the server and deleted in 30 days. Since normal messages may be misjudged as junk messages (false positives), users must check the folder periodically.
The [Junk Email] folder is not visible through POP access, and in some cases, it is not even visible through IMAP access. When you cannot view the Junk Email folder, you cannot receive and read misjudged messages.
The [Junk Email] folder can be viewed using webmail (Outlook on the web), so make sure you regularly check your webmail for misjudged emails and click the “Not Junk” button to report false positives to Microsoft. There is a “Junk email” section in your webmail settings where you can register “Safe senders and domains”. This allows you to bypass junk mail filtering by the sender’s email address and domain. The junk email filtering function is enforced, and you cannot disable it.