Emails Missing When Checking Email from Multiple Devices
If you're using more than one device to access your email, make sure you're using the proper IMAP settings.
Note: Using both IMAP and POP simultaneously or using POP across multiple devices can cause error messages when trying to send, receive or access new email such as the following: "The mail server denied access to your account because another mail client was using it." To avoid these errors, we recommend using IMAP on all devices. Learn more about switching from POP to IMAP.
Still you have facing any trouble then just contact our USA Toll Free Number 1-800-721-0104 and click here; Charter Email Technical support