This guide helps you resolve the email error ‘The server you are connected to is using a certificate that cannot be verified'.

Solution

The error message mentioned above appears in your software/email client because you are using IMAP/POP/SMTP server names in the format mail.domaine.xyz while having the SSL option enabled, although the SSL certificate is only valid for the infomaniak.com domain.

Therefore, you should only use mail.infomaniak.com as the incoming and outgoing server to enable SSL on the connection. Learn more