Normally, once a year, we need to renew the SSL certificates of the Server. When that occurs, it's possible that by accessing your hosting control panel (cPanel), the Webmail or read and send mail from a mail client such as Mozilla Thunderbird, Outlook, etc., a message could appear informing that the SSL security certificate is invalid.
Please simply add an exception and accept the SSL certificate as valid. This occurs because the security certificate for the email and FTP server is a shared certificate under auralsolutions.net domain, but provides the same security and protection as if it were under the domain of our email accounts.
Of course it is important that the certificate is for your domain or an AuralSolutions domain name.
If you have any doubt, please contact the technical support from the client area.