Marco Fioretti skrev den 2018-12-08 11:03:
I have had to reinstall my email server on another Linux (centos 7.6)
reinstalls often helps make the same problems with precompiled distros :=)
is openssl installed or what ssl api is in use ? did you create a bug report to centos mantainers ? its not a postfix/dovecot problem that ssl is not working lets encrypt is irrelevant