POP3 downloads email from a server to a single device, then deletes it from the server. Because your messages get downloaded to a single computer or device and then deleted from the server, it can appear that mail is missing or disappearing from your Inbox if you try to check your mail from a different computer.
You can check on the mail server settings trough your Webmail account or trough cPanel account


Our suggestion is to manually set the email account on your device, you will find configuration options within your cPanel or Webmail account.
Please open a support ticket if you need any further assistance.