Exim unknown protocol

Dear Cpanel Support What is the cause of this error? Why do all Cpanel servers eximmainlog have this error? Please solve this problem immediately, Many of our emails are in trouble , We have 13 Cpanel server and All have this problem cpanel version : v68.0.28 (SSL_accept): error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol