ISSUE :-
I received 4 emails with following subjects.
Certificate for courier-imapd on hostname.domainname will expire in less then 30 days
Certificate for cpanel on hostname.domainname will expire in less then 30 days
Certificate for exim on hostname.domainname will expire in less then 30 days
Certificate for courier-pop3d on hostname.domainname will expire in less then 30 days
The contents in all of the emails is
Certificate for courier-imapd on hostname.domainname will expire in less then 30 days. You should install a new certifcate as soon as possible. You can install a new certificate in WHM under “Manager Service SSL Certificates”, or by clicking this link: https://hostname.domainname:2087/scripts2/manageservicecrts
Fix :-
Exim or the mail server uses self signed certificates for its services and is valid for one year. You need to renew the certificate in every year. You can renew the certificates from WHM as follows.
WHM login >> Main >> Service Configuration >> Manage Service SSL Certificates >> Reset Certificate
