Here are the most prevalent causes for Outlook Not Receiving Emails issue. Your machine may be experiencing a network connectivity issue. Incoming emails are sometimes blocked by system components such as antivirus and firewall. One reason is that incoming emails are sent to the spam folder rather than the inbox.
A problem with Outlook synchronization could possibly be the cause. This error is caused by incorrect email credentials or configuration information. Malware has attacked the machine, causing Outlook data to be corrupted.