Am 04.08.2017 um 18:21 schrieb Terry Jones:
(1) /var/lib/dovecot/ssl-parameters.dat*DOES* exist. and (2) If I delete it and restart dovecot, it successully re-creates it, as per Aug 4 17:02:32 bbb dovecot: ssl-params: Generating SSL parameters Aug 4 17:06:58 bbb dovecot: ssl-params: SSL parameters regeneration completed
The file has a non-zero size? Check "ausearch -m avc" whether SELinux is preventing access. Alexander