Just to test a theory, can you look at dovecot.conf, and see if you have any ssl_ca directives set, and if so, remove them and restart Dovecot? (You may have to kill dovecot services with kill -9.)
Just to test a theory, can you look at dovecot.conf, and see if you have any ssl_ca directives set, and if so, remove them and restart Dovecot? (You may have to kill dovecot services with kill -9.)