Turn it off for a minute to see if the mail starts flowing.

If all else fails, delete the email account from your device settings and sign back in. This often clears out corrupted cache files. 🛡️ Security Software Interference

On desktops, aggressive antivirus or firewall settings can view incoming mail as a threat.

Sometimes, updates or accidental clicks can mess with your IMAP or POP settings.

If you use Gmail or Outlook, your email storage is shared with Google Drive or OneDrive. If those are full, you won’t receive new mail. 🔄 App and System Refresh

Software bugs can prevent the syncing process from initiating. Close the app completely and reopen it.