Connections to the server “poppro.zoho.com” on the default ports timed out.

Connections to the server “poppro.zoho.com” on the default ports timed out.

Hi we are not able to receive or send mail on either outlook or mac mail. Getting this error message, Connections to the server “poppro.zoho.com” on the default ports timed out.

Please look at the error. But can access through webmail. Please correct the technical error.