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Probleme email dupa update de la CentOS 8.1 la CentOS 8.2

Dupa update la server utilizatorii nu se mai pot conecta la serverul de email

Jun 21 17:55:00 mail dovecot[37409]: imap-login: Disconnected: TLS initialization failed. (no auth attempts in 0 secs): user=<>, rip=IP, lip=IP, session=
Jun 21 17:55:36 mail dovecot[37409]: imap-login: Error: Failed to initialize SSL server context: Can't load DH parameters: error:1408518A:SSL routines:ssl3_ctx_ctrl:dh key too small: user=<>, rip=IP, lip=IP, session=


Rezolvarea
Generam dh.pem

cd /etc/dovecot
openssl dhparam 2048 > dh.pem

Editam /etc/dovecot/10-ssl.conf

adaugam
ssl_dh= </etc/dovecot/dh.pem

restartam dovecot
service dovecot restart