When configuring iPhone users put in their mail server as “”, but when iPhone fetches the certificate, it sees the name “” printed in it. Whereas, the certificate of the mail server will be in the format “mail. Many hosting companies provide the mail server name as “mail. A mismatch between Domain name and Server name Of course, there are cases where this error is shown when the certificate is indeed bad (expired, wrong domain, etc.).īut we often see cases where valid certificates are also misclassified as fake by iPhone. What are the causes of Cannot Verify Server Identity error? It even pops up with popular mail servers like, , etc. Unfortunately, the error can appear when using any mail servers. A new account is being setup in iPhone, or.

The mail server’s certificate is changed (eg.If it finds the certificate expired, or not matching the domain name, or not signed by a well-known company, it’ll mark the cert as unreliable.Īt that point, the secure connection fails, and iPhone or the device will show the error “ Cannot Verify Server Identity“. When an iPhone tries to connect to a mail server securely, it’ll fetch the server’s “SSL certificate” and check if it is reliable. What is the error Cannot Verify Server Identity? Here at we see this error almost every day as part of our Outsourced Tech Support services, where we manage the tech support operations of web hosts, digital marketers, and more. It means that device considers the mail server’s certificate is fake. “ Cannot Verify Server Identity” is a common error in iPhone and other iOS devices.

Apple sandbox certificate not trusted